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# Merge requests API
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Every API call to merge requests must be authenticated.

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## List merge requests

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> [Introduced][ce-13060] in GitLab 9.5.

Get all merge requests the authenticated user has access to. By
default it returns only merge requests created by the current user. To
get all merge requests, use parameter `scope=all`.

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The `state` parameter can be used to get only merge requests with a
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given state (`opened`, `closed`, `locked`, or `merged`) or all of them (`all`). It should be noted that when searching by `locked` it will mostly return no results as it is a short-lived, transitional state.
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The pagination parameters `page` and `per_page` can be used to
restrict the list of merge requests.

```
GET /merge_requests
GET /merge_requests?state=opened
GET /merge_requests?state=all
GET /merge_requests?milestone=release
GET /merge_requests?labels=bug,reproduced
GET /merge_requests?author_id=5
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GET /merge_requests?my_reaction_emoji=star
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GET /merge_requests?scope=assigned_to_me
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GET /merge_requests?search=foo&in=title
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```

Parameters:

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| Attribute           | Type     | Required | Description                                                                                                            |
| ------------------- | -------- | -------- | ---------------------------------------------------------------------------------------------------------------------- |
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| `state`             | string   | no       | Return all merge requests or just those that are `opened`, `closed`, `locked`, or `merged`                             |
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| `order_by`          | string   | no       | Return requests ordered by `created_at` or `updated_at` fields. Default is `created_at`                                |
| `sort`              | string   | no       | Return requests sorted in `asc` or `desc` order. Default is `desc`                                                     |
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| `milestone`         | string   | no       | Return merge requests for a specific milestone. `None` returns merge requests with no milestone. `Any` returns merge requests that have an assigned milestone. |
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| `view`              | string   | no       | If `simple`, returns the `iid`, URL, title, description, and basic state of merge request                              |
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| `labels`            | string   | no       | Return merge requests matching a comma separated list of labels. `None` lists all merge requests with no labels. `Any` lists all merge requests with at least one label. `No+Label` (Deprecated) lists all merge requests with no labels. Predefined names are case-insensitive. |
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| `created_after`     | datetime | no       | Return merge requests created on or after the given time                                                               |
| `created_before`    | datetime | no       | Return merge requests created on or before the given time                                                              |
| `updated_after`     | datetime | no       | Return merge requests updated on or after the given time                                                               |
| `updated_before`    | datetime | no       | Return merge requests updated on or before the given time                                                              |
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| `scope`             | string   | no       | Return merge requests for the given scope: `created_by_me`, `assigned_to_me` or `all`. Defaults to `created_by_me`<br> For versions before 11.0, use the now deprecated `created-by-me` or `assigned-to-me` scopes instead. |
| `author_id`         | integer  | no       | Returns merge requests created by the given user `id`. Combine with `scope=all` or `scope=assigned_to_me`              |
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| `assignee_id`       | integer  | no       | Returns merge requests assigned to the given user `id`. `None` returns unassigned merge requests. `Any` returns merge requests with an assignee. |
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| `my_reaction_emoji` | string   | no       | Return merge requests reacted by the authenticated user by the given `emoji`. `None` returns issues not given a reaction. `Any` returns issues given at least one reaction. _([Introduced][ce-14016] in GitLab 10.0)_ |
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| `source_branch`     | string   | no       | Return merge requests with the given source branch                                                                     |
| `target_branch`     | string   | no       | Return merge requests with the given target branch                                                                     |
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| `search`            | string   | no       | Search merge requests against their `title` and `description`                                                          |
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| `in`                | string   | no       | Modify the scope of the `search` attribute. `title`, `description`, or a string joined them with comma. Default is `title,description` |
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| `wip`               | string   | no       | Filter merge requests against their `wip` status. `yes` to return *only* WIP merge requests, `no` to return *non* WIP merge requests |
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```json
[
  {
    "id": 1,
    "iid": 1,
    "project_id": 3,
    "title": "test1",
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    "description": "fixed login page css paddings",
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    "state": "merged",
    "merged_by": {
      "id": 87854,
      "name": "Douwe Maan",
      "username": "DouweM",
      "state": "active",
      "avatar_url": "https://gitlab.example.com/uploads/-/system/user/avatar/87854/avatar.png",
      "web_url": "https://gitlab.com/DouweM"
    },
    "merged_at": "2018-09-07T11:16:17.520Z",
    "closed_by": null,
    "closed_at": null,
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    "created_at": "2017-04-29T08:46:00Z",
    "updated_at": "2017-04-29T08:46:00Z",
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    "target_branch": "master",
    "source_branch": "test1",
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    "upvotes": 0,
    "downvotes": 0,
    "author": {
      "id": 1,
      "name": "Administrator",
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      "username": "admin",
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      "state": "active",
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      "avatar_url": null,
      "web_url" : "https://gitlab.example.com/admin"
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    },
    "assignee": {
      "id": 1,
      "name": "Administrator",
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      "username": "admin",
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      "state": "active",
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      "avatar_url": null,
      "web_url" : "https://gitlab.example.com/admin"
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    },
    "source_project_id": 2,
    "target_project_id": 3,
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    "labels": [
      "Community contribution",
      "Manage"
    ],
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    "work_in_progress": false,
    "milestone": {
      "id": 5,
      "iid": 1,
      "project_id": 3,
      "title": "v2.0",
      "description": "Assumenda aut placeat expedita exercitationem labore sunt enim earum.",
      "state": "closed",
      "created_at": "2015-02-02T19:49:26.013Z",
      "updated_at": "2015-02-02T19:49:26.013Z",
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      "due_date": "2018-09-22",
      "start_date": "2018-08-08",
      "web_url": "https://gitlab.example.com/my-group/my-project/milestones/1"
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    },
    "merge_when_pipeline_succeeds": true,
    "merge_status": "can_be_merged",
    "sha": "8888888888888888888888888888888888888888",
    "merge_commit_sha": null,
    "user_notes_count": 1,
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    "discussion_locked": null,
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    "should_remove_source_branch": true,
    "force_remove_source_branch": false,
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    "allow_collaboration": false,
    "allow_maintainer_to_push": false,
    "web_url": "http://gitlab.example.com/my-group/my-project/merge_requests/1",
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    "time_stats": {
      "time_estimate": 0,
      "total_time_spent": 0,
      "human_time_estimate": null,
      "human_total_time_spent": null
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    },
    "squash": false
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  }
]
```

## List project merge requests

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Get all merge requests for this project.
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The `state` parameter can be used to get only merge requests with a given state (`opened`, `closed`, `locked`, or `merged`) or all of them (`all`).
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The pagination parameters `page` and `per_page` can be used to restrict the list of merge requests.
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```
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GET /projects/:id/merge_requests
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GET /projects/:id/merge_requests?state=opened
GET /projects/:id/merge_requests?state=all
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GET /projects/:id/merge_requests?iids[]=42&iids[]=43
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GET /projects/:id/merge_requests?milestone=release
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GET /projects/:id/merge_requests?labels=bug,reproduced
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GET /projects/:id/merge_requests?my_reaction_emoji=star
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```

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`project_id` represents the ID of the project where the MR resides.
`project_id` will always equal `target_project_id`.

In the case of a merge request from the same project,
`source_project_id`, `target_project_id` and `project_id`
will be the same. In the case of a merge request from a fork,
`target_project_id` and `project_id` will be the same and
`source_project_id` will be the fork project's ID.

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Parameters:

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| Attribute           | Type           | Required | Description                                                                                                                    |
| ------------------- | -------------- | -------- | ------------------------------------------------------------------------------------------------------------------------------ |
| `id`                | integer        | yes      | The ID of a project                                                                                                            |
| `iids[]`            | Array[integer] | no       | Return the request having the given `iid`                                                                                      |
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| `state`             | string         | no       | Return all merge requests or just those that are `opened`, `closed`, `locked`, or `merged`                                     |
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| `order_by`          | string         | no       | Return requests ordered by `created_at` or `updated_at` fields. Default is `created_at`                                        |
| `sort`              | string         | no       | Return requests sorted in `asc` or `desc` order. Default is `desc`                                                             |
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| `milestone`         | string         | no       | Return merge requests for a specific milestone. `None` returns merge requests with no milestone. `Any` returns merge requests that have an assigned milestone. |
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| `view`              | string         | no       | If `simple`, returns the `iid`, URL, title, description, and basic state of merge request                                      |
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| `labels`            | string         | no       | Return merge requests matching a comma separated list of labels. `None` lists all merge requests with no labels. `Any` lists all merge requests with at least one label. `No+Label` (Deprecated) lists all merge requests with no labels. Predefined names are case-insensitive. |
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| `created_after`     | datetime       | no       | Return merge requests created on or after the given time                                                                       |
| `created_before`    | datetime       | no       | Return merge requests created on or before the given time                                                                      |
| `updated_after`     | datetime       | no       | Return merge requests updated on or after the given time                                                                       |
| `updated_before`    | datetime       | no       | Return merge requests updated on or before the given time                                                                      |
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| `scope`             | string         | no       | Return merge requests for the given scope: `created_by_me`, `assigned_to_me` or `all`.<br> For versions before 11.0, use the now deprecated `created-by-me` or `assigned-to-me` scopes instead.<br> _([Introduced][ce-13060] in GitLab 9.5. [Changed to snake_case][ce-18935] in GitLab 11.0)_ |
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| `author_id`         | integer        | no       | Returns merge requests created by the given user `id` _([Introduced][ce-13060] in GitLab 9.5)_                                 |
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| `assignee_id`       | integer        | no       | Returns merge requests assigned to the given user `id`. `None` returns unassigned merge requests. `Any` returns merge requests with an assignee. _([Introduced][ce-13060] in GitLab 9.5)_ |
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| `my_reaction_emoji` | string         | no       | Return merge requests reacted by the authenticated user by the given `emoji`. `None` returns issues not given a reaction. `Any` returns issues given at least one reaction. _([Introduced][ce-14016] in GitLab 10.0)_ |
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| `source_branch`     | string         | no       | Return merge requests with the given source branch                                                                             |
| `target_branch`     | string         | no       | Return merge requests with the given target branch                                                                             |
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| `search`            | string         | no       | Search merge requests against their `title` and `description`                                                                  |
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```json
[
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  {
    "id": 1,
    "iid": 1,
    "project_id": 3,
    "title": "test1",
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    "description": "fixed login page css paddings",
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    "state": "merged",
    "merged_by": {
      "id": 87854,
      "name": "Douwe Maan",
      "username": "DouweM",
      "state": "active",
      "avatar_url": "https://gitlab.example.com/uploads/-/system/user/avatar/87854/avatar.png",
      "web_url": "https://gitlab.com/DouweM"
    },
    "merged_at": "2018-09-07T11:16:17.520Z",
    "closed_by": null,
    "closed_at": null,
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    "created_at": "2017-04-29T08:46:00Z",
    "updated_at": "2017-04-29T08:46:00Z",
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    "target_branch": "master",
    "source_branch": "test1",
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    "upvotes": 0,
    "downvotes": 0,
    "author": {
      "id": 1,
      "name": "Administrator",
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      "username": "admin",
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      "state": "active",
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      "avatar_url": null,
      "web_url" : "https://gitlab.example.com/admin"
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    },
    "assignee": {
      "id": 1,
      "name": "Administrator",
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      "username": "admin",
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      "state": "active",
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      "avatar_url": null,
      "web_url" : "https://gitlab.example.com/admin"
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    },
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    "source_project_id": 2,
    "target_project_id": 3,
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    "labels": [
      "Community contribution",
      "Manage"
    ],
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    "work_in_progress": false,
    "milestone": {
      "id": 5,
      "iid": 1,
      "project_id": 3,
      "title": "v2.0",
      "description": "Assumenda aut placeat expedita exercitationem labore sunt enim earum.",
      "state": "closed",
      "created_at": "2015-02-02T19:49:26.013Z",
      "updated_at": "2015-02-02T19:49:26.013Z",
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      "due_date": "2018-09-22",
      "start_date": "2018-08-08",
      "web_url": "https://gitlab.example.com/my-group/my-project/milestones/1"
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    },
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    "merge_when_pipeline_succeeds": true,
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    "merge_status": "can_be_merged",
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    "sha": "8888888888888888888888888888888888888888",
    "merge_commit_sha": null,
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    "user_notes_count": 1,
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    "discussion_locked": null,
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    "should_remove_source_branch": true,
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    "force_remove_source_branch": false,
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    "allow_collaboration": false,
    "allow_maintainer_to_push": false,
    "web_url": "http://gitlab.example.com/my-group/my-project/merge_requests/1",
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    "time_stats": {
      "time_estimate": 0,
      "total_time_spent": 0,
      "human_time_estimate": null,
      "human_total_time_spent": null
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    },
    "squash": false
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  }
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]
```

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## List group merge requests

Get all merge requests for this group and its subgroups.
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The `state` parameter can be used to get only merge requests with a given state (`opened`, `closed`, `locked`, or `merged`) or all of them (`all`).
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The pagination parameters `page` and `per_page` can be used to restrict the list of merge requests.

```
GET /groups/:id/merge_requests
GET /groups/:id/merge_requests?state=opened
GET /groups/:id/merge_requests?state=all
GET /groups/:id/merge_requests?milestone=release
GET /groups/:id/merge_requests?labels=bug,reproduced
GET /groups/:id/merge_requests?my_reaction_emoji=star
```

`group_id` represents the ID of the group which contains the project where the MR resides.

Parameters:

| Attribute           | Type           | Required | Description                                                                                                                    |
| ------------------- | -------------- | -------- | ------------------------------------------------------------------------------------------------------------------------------ |
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| `id`                | integer        | yes      | The ID of a group                                                                                                              |
| `state`             | string         | no       | Return all merge requests or just those that are `opened`, `closed`, `locked`, or `merged`                                     |
| `order_by`          | string         | no       | Return merge requests ordered by `created_at` or `updated_at` fields. Default is `created_at`                                  |
| `sort`              | string         | no       | Return merge requests sorted in `asc` or `desc` order. Default is `desc`                                                       |
| `milestone`         | string         | no       | Return merge requests for a specific milestone. `None` returns merge requests with no milestone. `Any` returns merge requests that have an assigned milestone. |
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| `view`              | string         | no       | If `simple`, returns the `iid`, URL, title, description, and basic state of merge request                                      |
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| `labels`            | string         | no       | Return merge requests matching a comma separated list of labels. `None` lists all merge requests with no labels. `Any` lists all merge requests with at least one label. `No+Label` (Deprecated) lists all merge requests with no labels. Predefined names are case-insensitive. |
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| `created_after`     | datetime       | no       | Return merge requests created on or after the given time                                                                       |
| `created_before`    | datetime       | no       | Return merge requests created on or before the given time                                                                      |
| `updated_after`     | datetime       | no       | Return merge requests updated on or after the given time                                                                       |
| `updated_before`    | datetime       | no       | Return merge requests updated on or before the given time                                                                      |
| `scope`             | string         | no       | Return merge requests for the given scope: `created_by_me`, `assigned_to_me` or `all`.<br>                                     |
| `author_id`         | integer        | no       | Returns merge requests created by the given user `id` _([Introduced][ce-13060] in GitLab 9.5)_                                 |
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| `assignee_id`       | integer        | no       | Returns merge requests assigned to the given user `id`. `None` returns unassigned merge requests. `Any` returns merge requests with an assignee. _([Introduced][ce-13060] in GitLab 9.5)_ |
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| `my_reaction_emoji` | string         | no       | Return merge requests reacted by the authenticated user by the given `emoji`. `None` returns issues not given a reaction. `Any` returns issues given at least one reaction. _([Introduced][ce-14016] in GitLab 10.0)_ |
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| `source_branch`     | string         | no       | Return merge requests with the given source branch                                                                             |
| `target_branch`     | string         | no       | Return merge requests with the given target branch                                                                             |
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| `search`            | string         | no       | Search merge requests against their `title` and `description`                                                                  |

```json
[
  {
    "id": 1,
    "iid": 1,
    "project_id": 3,
    "title": "test1",
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    "description": "fixed login page css paddings",
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    "state": "merged",
    "merged_by": {
      "id": 87854,
      "name": "Douwe Maan",
      "username": "DouweM",
      "state": "active",
      "avatar_url": "https://gitlab.example.com/uploads/-/system/user/avatar/87854/avatar.png",
      "web_url": "https://gitlab.com/DouweM"
    },
    "merged_at": "2018-09-07T11:16:17.520Z",
    "closed_by": null,
    "closed_at": null,
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    "created_at": "2017-04-29T08:46:00Z",
    "updated_at": "2017-04-29T08:46:00Z",
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    "target_branch": "master",
    "source_branch": "test1",
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    "upvotes": 0,
    "downvotes": 0,
    "author": {
      "id": 1,
      "name": "Administrator",
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      "username": "admin",
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      "state": "active",
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      "avatar_url": null,
      "web_url" : "https://gitlab.example.com/admin"
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    },
    "assignee": {
      "id": 1,
      "name": "Administrator",
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      "username": "admin",
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      "state": "active",
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      "avatar_url": null,
      "web_url" : "https://gitlab.example.com/admin"
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    },
    "source_project_id": 2,
    "target_project_id": 3,
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    "labels": [
      "Community contribution",
      "Manage"
    ],
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    "work_in_progress": false,
    "milestone": {
      "id": 5,
      "iid": 1,
      "project_id": 3,
      "title": "v2.0",
      "description": "Assumenda aut placeat expedita exercitationem labore sunt enim earum.",
      "state": "closed",
      "created_at": "2015-02-02T19:49:26.013Z",
      "updated_at": "2015-02-02T19:49:26.013Z",
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      "due_date": "2018-10-22",
      "start_date": "2018-09-08",
      "web_url": "gitlab.example.com/my-group/my-project/milestones/1"
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    },
    "merge_when_pipeline_succeeds": true,
    "merge_status": "can_be_merged",
    "sha": "8888888888888888888888888888888888888888",
    "merge_commit_sha": null,
    "user_notes_count": 1,
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    "discussion_locked": null,
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    "should_remove_source_branch": true,
    "force_remove_source_branch": false,
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    "web_url": "http://gitlab.example.com/my-group/my-project/merge_requests/1",
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    "time_stats": {
      "time_estimate": 0,
      "total_time_spent": 0,
      "human_time_estimate": null,
      "human_total_time_spent": null
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    },
    "squash": false
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  }
]
```

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## Get single MR

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Shows information about a single merge request.
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**Note**: the `changes_count` value in the response is a string, not an
integer. This is because when an MR has too many changes to display and store,
it will be capped at 1,000. In that case, the API will return the string
`"1000+"` for the changes count.

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```
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GET /projects/:id/merge_requests/:merge_request_iid
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```

Parameters:

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- `id` (required) - The ID or [URL-encoded path of the project](README.md#namespaced-path-encoding) owned by the authenticated user
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- `merge_request_iid` (required) - The internal ID of the merge request
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- `render_html` (optional) - If `true` response includes rendered HTML for title and description
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- `include_diverged_commits_count` (optional) - If `true` response includes the commits behind the target branch
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- `include_rebase_in_progress` (optional) - If `true` response includes whether a rebase operation is in progress
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```json
{
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  "id": 1,
  "iid": 1,
  "project_id": 3,
  "title": "test1",
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  "description": "fixed login page css paddings",
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  "state": "merged",
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  "created_at": "2017-04-29T08:46:00Z",
  "updated_at": "2017-04-29T08:46:00Z",
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  "target_branch": "master",
  "source_branch": "test1",
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  "upvotes": 0,
  "downvotes": 0,
  "author": {
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    "id": 1,
    "name": "Administrator",
    "username": "admin",
    "state": "active",
    "avatar_url": null,
    "web_url" : "https://gitlab.example.com/admin"
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  },
  "assignee": {
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    "id": 1,
    "name": "Administrator",
    "username": "admin",
    "state": "active",
    "avatar_url": null,
    "web_url" : "https://gitlab.example.com/admin"
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  },
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  "source_project_id": 2,
  "target_project_id": 3,
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  "labels": [
    "Community contribution",
    "Manage"
  ],
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  "work_in_progress": false,
  "milestone": {
    "id": 5,
    "iid": 1,
    "project_id": 3,
    "title": "v2.0",
    "description": "Assumenda aut placeat expedita exercitationem labore sunt enim earum.",
    "state": "closed",
    "created_at": "2015-02-02T19:49:26.013Z",
    "updated_at": "2015-02-02T19:49:26.013Z",
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    "due_date": "2018-09-22",
    "start_date": "2018-08-08",
    "web_url": "https://gitlab.example.com/my-group/my-project/milestones/1"
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  },
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  "merge_when_pipeline_succeeds": true,
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  "merge_status": "can_be_merged",
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  "merge_error": null,
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  "sha": "8888888888888888888888888888888888888888",
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  "merge_commit_sha": null,
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  "user_notes_count": 1,
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  "discussion_locked": null,
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  "should_remove_source_branch": true,
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  "force_remove_source_branch": false,
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  "allow_collaboration": false,
  "allow_maintainer_to_push": false,
  "web_url": "http://gitlab.example.com/my-group/my-project/merge_requests/1",
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  "time_stats": {
    "time_estimate": 0,
    "total_time_spent": 0,
    "human_time_estimate": null,
    "human_total_time_spent": null
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  },
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  "squash": false,
  "subscribed": false,
  "changes_count": "1",
  "merged_by": {
    "id": 87854,
    "name": "Douwe Maan",
    "username": "DouweM",
    "state": "active",
    "avatar_url": "https://gitlab.example.com/uploads/-/system/user/avatar/87854/avatar.png",
    "web_url": "https://gitlab.com/DouweM"
  },
  "merged_at": "2018-09-07T11:16:17.520Z",
  "closed_by": null,
  "closed_at": null,
  "latest_build_started_at": "2018-09-07T07:27:38.472Z",
  "latest_build_finished_at": "2018-09-07T08:07:06.012Z",
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  "first_deployed_to_production_at": null,
  "pipeline": {
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    "id": 29626725,
    "sha": "2be7ddb704c7b6b83732fdd5b9f09d5a397b5f8f",
    "ref": "patch-28",
    "status": "success",
    "web_url": "https://gitlab.example.com/my-group/my-project/pipelines/29626725"
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  },
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  "diff_refs": {
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    "base_sha": "c380d3acebd181f13629a25d2e2acca46ffe1e00",
    "head_sha": "2be7ddb704c7b6b83732fdd5b9f09d5a397b5f8f",
    "start_sha": "c380d3acebd181f13629a25d2e2acca46ffe1e00"
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  },
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  "diverged_commits_count": 2,
  "rebase_in_progress": false
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}
```

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## Get single MR participants

Get a list of merge request participants.

```
GET /projects/:id/merge_requests/:merge_request_iid/participants
```

Parameters:

- `id` (required) - The ID or [URL-encoded path of the project](README.md#namespaced-path-encoding) owned by the authenticated user
- `merge_request_iid` (required) - The internal ID of the merge request


```json
[
  {
    "id": 1,
    "name": "John Doe1",
    "username": "user1",
    "state": "active",
    "avatar_url": "http://www.gravatar.com/avatar/c922747a93b40d1ea88262bf1aebee62?s=80&d=identicon",
    "web_url": "http://localhost/user1"
  },
  {
    "id": 2,
    "name": "John Doe2",
    "username": "user2",
    "state": "active",
    "avatar_url": "http://www.gravatar.com/avatar/10fc7f102be8de7657fb4d80898bbfe3?s=80&d=identicon",
    "web_url": "http://localhost/user2"
  },
]
```

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## Get single MR commits

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Get a list of merge request commits.
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```
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GET /projects/:id/merge_requests/:merge_request_iid/commits
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```

Parameters:

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- `id` (required) - The ID or [URL-encoded path of the project](README.md#namespaced-path-encoding) owned by the authenticated user
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- `merge_request_iid` (required) - The internal ID of the merge request
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```json
[
  {
    "id": "ed899a2f4b50b4370feeea94676502b42383c746",
    "short_id": "ed899a2f4b5",
    "title": "Replace sanitize with escape once",
    "author_name": "Dmitriy Zaporozhets",
    "author_email": "dzaporozhets@sphereconsultinginc.com",
    "created_at": "2012-09-20T11:50:22+03:00",
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    "message": "Replace sanitize with escape once"
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  },
  {
    "id": "6104942438c14ec7bd21c6cd5bd995272b3faff6",
    "short_id": "6104942438c",
    "title": "Sanitize for network graph",
    "author_name": "randx",
    "author_email": "dmitriy.zaporozhets@gmail.com",
    "created_at": "2012-09-20T09:06:12+03:00",
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    "message": "Sanitize for network graph"
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  }
]
```

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## Get single MR changes

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Shows information about the merge request including its files and changes.
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```
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GET /projects/:id/merge_requests/:merge_request_iid/changes
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```

Parameters:

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- `id` (required) - The ID or [URL-encoded path of the project](README.md#namespaced-path-encoding) owned by the authenticated user
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- `merge_request_iid` (required) - The internal ID of the merge request
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```json
{
  "id": 21,
  "iid": 1,
  "project_id": 4,
  "title": "Blanditiis beatae suscipit hic assumenda et molestias nisi asperiores repellat et.",
  "state": "reopened",
  "created_at": "2015-02-02T19:49:39.159Z",
  "updated_at": "2015-02-02T20:08:49.959Z",
  "target_branch": "secret_token",
  "source_branch": "version-1-9",
  "upvotes": 0,
  "downvotes": 0,
  "author": {
    "name": "Chad Hamill",
    "username": "jarrett",
    "id": 5,
    "state": "active",
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    "avatar_url": "http://www.gravatar.com/avatar/b95567800f828948baf5f4160ebb2473?s=40&d=identicon",
    "web_url" : "https://gitlab.example.com/jarrett"
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  },
  "assignee": {
    "name": "Administrator",
    "username": "root",
    "id": 1,
    "state": "active",
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    "avatar_url": "http://www.gravatar.com/avatar/e64c7d89f26bd1972efa854d13d7dd61?s=40&d=identicon",
    "web_url" : "https://gitlab.example.com/root"
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  },
  "source_project_id": 4,
  "target_project_id": 4,
  "labels": [ ],
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  "description": "Qui voluptatibus placeat ipsa alias quasi. Deleniti rem ut sint. Optio velit qui distinctio.",
  "work_in_progress": false,
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  "milestone": {
    "id": 5,
    "iid": 1,
    "project_id": 4,
    "title": "v2.0",
    "description": "Assumenda aut placeat expedita exercitationem labore sunt enim earum.",
    "state": "closed",
    "created_at": "2015-02-02T19:49:26.013Z",
    "updated_at": "2015-02-02T19:49:26.013Z",
    "due_date": null
  },
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  "merge_when_pipeline_succeeds": true,
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  "merge_status": "can_be_merged",
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  "subscribed" : true,
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  "sha": "8888888888888888888888888888888888888888",
  "merge_commit_sha": null,
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  "user_notes_count": 1,
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  "changes_count": "1",
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  "should_remove_source_branch": true,
  "force_remove_source_branch": false,
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  "squash": false,
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  "web_url": "http://example.com/example/example/merge_requests/1",
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  "discussion_locked": false,
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  "time_stats": {
    "time_estimate": 0,
    "total_time_spent": 0,
    "human_time_estimate": null,
    "human_total_time_spent": null
  }
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  "changes": [
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    {
    "old_path": "VERSION",
    "new_path": "VERSION",
    "a_mode": "100644",
    "b_mode": "100644",
    "diff": "--- a/VERSION\ +++ b/VERSION\ @@ -1 +1 @@\ -1.9.7\ +1.9.8",
    "new_file": false,
    "renamed_file": false,
    "deleted_file": false
    }
  ]
}
```

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## List MR pipelines

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> [Introduced][ce-15454] in GitLab 10.5.0.

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Get a list of merge request pipelines.

```
GET /projects/:id/merge_requests/:merge_request_iid/pipelines
```

Parameters:

- `id` (required) - The ID or [URL-encoded path of the project](README.md#namespaced-path-encoding) owned by the authenticated user
- `merge_request_iid` (required) - The internal ID of the merge request

```json
[
  {
    "id": 77,
    "sha": "959e04d7c7a30600c894bd3c0cd0e1ce7f42c11d",
    "ref": "master",
    "status": "success"
  }
]
```

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## Create MR

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Creates a new merge request.
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```
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POST /projects/:id/merge_requests
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```

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| Attribute                  | Type    | Required | Description                                                                     |
| ---------                  | ----    | -------- | -----------                                                                     |
| `id`                       | integer/string  | yes      | The ID or [URL-encoded path of the project](README.md#namespaced-path-encoding) owned by the authenticated user |
| `source_branch`            | string  | yes      | The source branch                                                               |
| `target_branch`            | string  | yes      | The target branch                                                               |
| `title`                    | string  | yes      | Title of MR                                                                     |
| `assignee_id`              | integer | no       | Assignee user ID                                                                |
| `description`              | string  | no       | Description of MR                                                               |
| `target_project_id`        | integer | no       | The target project (numeric id)                                                 |
| `labels`                   | string  | no       | Labels for MR as a comma-separated list                                         |
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| `milestone_id`             | integer | no       | The global ID of a milestone                                                           |
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| `remove_source_branch`     | boolean | no       | Flag indicating if a merge request should remove the source branch when merging |
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| `allow_collaboration`      | boolean | no       | Allow commits from members who can merge to the target branch                   |
| `allow_maintainer_to_push` | boolean | no       | Deprecated, see allow_collaboration                                             |
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| `squash`                   | boolean | no       | Squash commits into a single commit when merging                                |
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```json
{
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  "id": 1,
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  "iid": 1,
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  "project_id": 3,
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  "title": "test1",
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  "description": "fixed login page css paddings",
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  "state": "merged",
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  "created_at": "2017-04-29T08:46:00Z",
  "updated_at": "2017-04-29T08:46:00Z",
  "target_branch": "master",
  "source_branch": "test1",
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  "upvotes": 0,
  "downvotes": 0,
  "author": {
    "id": 1,
    "name": "Administrator",
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    "username": "admin",
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    "state": "active",
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    "avatar_url": null,
    "web_url" : "https://gitlab.example.com/admin"
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  },
  "assignee": {
    "id": 1,
    "name": "Administrator",
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    "username": "admin",
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    "state": "active",
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    "avatar_url": null,
    "web_url" : "https://gitlab.example.com/admin"
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  },
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  "source_project_id": 2,
  "target_project_id": 3,
  "labels": [
    "Community contribution",
    "Manage"
  ],
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  "work_in_progress": false,
  "milestone": {
    "id": 5,
    "iid": 1,
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    "project_id": 3,
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    "title": "v2.0",
    "description": "Assumenda aut placeat expedita exercitationem labore sunt enim earum.",
    "state": "closed",
    "created_at": "2015-02-02T19:49:26.013Z",
    "updated_at": "2015-02-02T19:49:26.013Z",
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    "due_date": "2018-09-22",
    "start_date": "2018-08-08",
    "web_url": "https://gitlab.example.com/my-group/my-project/milestones/1"
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  },
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  "merge_when_pipeline_succeeds": true,
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  "merge_status": "can_be_merged",
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  "merge_error": null,
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  "sha": "8888888888888888888888888888888888888888",
  "merge_commit_sha": null,
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  "user_notes_count": 1,
  "discussion_locked": null,
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  "should_remove_source_branch": true,
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  "force_remove_source_branch": false,
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  "allow_collaboration": false,
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  "allow_maintainer_to_push": false,
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  "web_url": "http://gitlab.example.com/my-group/my-project/merge_requests/1",
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  "time_stats": {
    "time_estimate": 0,
    "total_time_spent": 0,
    "human_time_estimate": null,
    "human_total_time_spent": null
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  },
  "squash": false,
  "subscribed": false,
  "changes_count": "1",
  "merged_by": {
    "id": 87854,
    "name": "Douwe Maan",
    "username": "DouweM",
    "state": "active",
    "avatar_url": "https://gitlab.example.com/uploads/-/system/user/avatar/87854/avatar.png",
    "web_url": "https://gitlab.com/DouweM"
  },
  "merged_at": "2018-09-07T11:16:17.520Z",
  "closed_by": null,
  "closed_at": null,
  "latest_build_started_at": "2018-09-07T07:27:38.472Z",
  "latest_build_finished_at": "2018-09-07T08:07:06.012Z",
  "first_deployed_to_production_at": null,
  "pipeline": {
    "id": 29626725,
    "sha": "2be7ddb704c7b6b83732fdd5b9f09d5a397b5f8f",
    "ref": "patch-28",
    "status": "success",
    "web_url": "https://gitlab.example.com/my-group/my-project/pipelines/29626725"
  },
  "diff_refs": {
    "base_sha": "c380d3acebd181f13629a25d2e2acca46ffe1e00",
    "head_sha": "2be7ddb704c7b6b83732fdd5b9f09d5a397b5f8f",
    "start_sha": "c380d3acebd181f13629a25d2e2acca46ffe1e00"
  },
  "diverged_commits_count": 2
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}
```

## Update MR

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Updates an existing merge request. You can change the target branch, title, or even close the MR.
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```
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PUT /projects/:id/merge_requests/:merge_request_iid
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```

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| Attribute                  | Type    | Required | Description                                                                     |
| ---------                  | ----    | -------- | -----------                                                                     |
| `id`                       | integer/string | yes  | The ID or [URL-encoded path of the project](README.md#namespaced-path-encoding) owned by the authenticated user |
| `merge_request_iid`        | integer | yes      | The ID of a merge request                                                       |
| `target_branch`            | string  | no       | The target branch                                                               |
| `title`                    | string  | no       | Title of MR                                                                     |
| `assignee_id`              | integer | no       | The ID of the user to assign the merge request to. Set to `0` or provide an empty value to unassign all assignees.  |
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| `milestone_id`             | integer | no       | The global ID of a milestone to assign the merge request to. Set to `0` or provide an empty value to unassign a milestone.|
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| `labels`                   | string  | no       | Comma-separated label names for a merge request. Set to an empty string to unassign all labels.                    |
| `description`              | string  | no       | Description of MR                                                               |
| `state_event`              | string  | no       | New state (close/reopen)                                                        |
| `remove_source_branch`     | boolean | no       | Flag indicating if a merge request should remove the source branch when merging |
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| `squash`                   | boolean | no       | Squash commits into a single commit when merging |
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| `discussion_locked`        | boolean | no       | Flag indicating if the merge request's discussion is locked. If the discussion is locked only project members can add, edit or resolve comments. |
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| `allow_collaboration`      | boolean | no       | Allow commits from members who can merge to the target branch                   |
| `allow_maintainer_to_push` | boolean | no       | Deprecated, see allow_collaboration                                             |
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Must include at least one non-required attribute from above.

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```json
{
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  "id": 1,
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  "iid": 1,
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  "project_id": 3,
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  "title": "test1",
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  "description": "fixed login page css paddings",
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  "state": "merged",
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  "created_at": "2017-04-29T08:46:00Z",
  "updated_at": "2017-04-29T08:46:00Z",
  "target_branch": "master",
  "source_branch": "test1",
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  "upvotes": 0,
  "downvotes": 0,
  "author": {
    "id": 1,
    "name": "Administrator",
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    "username": "admin",
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    "state": "active",
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    "avatar_url": null,
    "web_url" : "https://gitlab.example.com/admin"
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  },
  "assignee": {
    "id": 1,
    "name": "Administrator",
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    "username": "admin",
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    "state": "active",
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    "avatar_url": null,
    "web_url" : "https://gitlab.example.com/admin"
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  },
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  "source_project_id": 2,
  "target_project_id": 3,
  "labels": [
    "Community contribution",
    "Manage"
  ],
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  "work_in_progress": false,
  "milestone": {
    "id": 5,
    "iid": 1,
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    "project_id": 3,
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    "title": "v2.0",
    "description": "Assumenda aut placeat expedita exercitationem labore sunt enim earum.",
    "state": "closed",
    "created_at": "2015-02-02T19:49:26.013Z",
    "updated_at": "2015-02-02T19:49:26.013Z",
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    "due_date": "2018-09-22",
    "start_date": "2018-08-08",
    "web_url": "https://gitlab.example.com/my-group/my-project/milestones/1"
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  },
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  "merge_when_pipeline_succeeds": true,
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  "merge_status": "can_be_merged",
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  "merge_error": null,
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  "sha": "8888888888888888888888888888888888888888",
  "merge_commit_sha": null,
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  "user_notes_count": 1,
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  "discussion_locked": null,
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  "should_remove_source_branch": true,
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  "force_remove_source_branch": false,
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  "allow_collaboration": false,
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  "allow_maintainer_to_push": false,
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  "web_url": "http://gitlab.example.com/my-group/my-project/merge_requests/1",
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  "time_stats": {
    "time_estimate": 0,
    "total_time_spent": 0,
    "human_time_estimate": null,
    "human_total_time_spent": null
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  },
  "squash": false,
  "subscribed": false,
  "changes_count": "1",
  "merged_by": {
    "id": 87854,
    "name": "Douwe Maan",
    "username": "DouweM",
    "state": "active",
    "avatar_url": "https://gitlab.example.com/uploads/-/system/user/avatar/87854/avatar.png",
    "web_url": "https://gitlab.com/DouweM"
  },
  "merged_at": "2018-09-07T11:16:17.520Z",
  "closed_by": null,
  "closed_at": null,
  "latest_build_started_at": "2018-09-07T07:27:38.472Z",
  "latest_build_finished_at": "2018-09-07T08:07:06.012Z",
  "first_deployed_to_production_at": null,
  "pipeline": {
    "id": 29626725,
    "sha": "2be7ddb704c7b6b83732fdd5b9f09d5a397b5f8f",
    "ref": "patch-28",
    "status": "success",
    "web_url": "https://gitlab.example.com/my-group/my-project/pipelines/29626725"
  },
  "diff_refs": {
    "base_sha": "c380d3acebd181f13629a25d2e2acca46ffe1e00",
    "head_sha": "2be7ddb704c7b6b83732fdd5b9f09d5a397b5f8f",
    "start_sha": "c380d3acebd181f13629a25d2e2acca46ffe1e00"
  },
  "diverged_commits_count": 2
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}
```
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## Delete a merge request

Only for admins and project owners. Soft deletes the merge request in question.
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```
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DELETE /projects/:id/merge_requests/:merge_request_iid
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```

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| Attribute | Type    | Required | Description                          |
| --------- | ----    | -------- | -----------                          |
| `id`      | integer/string  | yes      | The ID or [URL-encoded path of the project](README.md#namespaced-path-encoding) owned by the authenticated user |
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| `merge_request_iid` | integer | yes      | The internal ID of the merge request |
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```bash
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curl --request DELETE --header "PRIVATE-TOKEN: <your_access_token>" https://gitlab.example.com/api/v4/projects/4/merge_requests/85
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```

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## Accept MR

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Merge changes submitted with MR using this API.
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If merge request is unable to be accepted (ie: Work in Progress, Closed, Pipeline Pending Completion, or Failed while requiring Success) - you'll get a `405` and the error message 'Method Not Allowed'
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If it has some conflicts and can not be merged - you'll get a `406` and the error message 'Branch cannot be merged'
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If the `sha` parameter is passed and does not match the HEAD of the source - you'll get a `409` and the error message 'SHA does not match HEAD of source branch'
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If you don't have permissions to accept this merge request - you'll get a `401`
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```
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PUT /projects/:id/merge_requests/:merge_request_iid/merge
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```

Parameters:

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- `id` (required) - The ID or [URL-encoded path of the project](README.md#namespaced-path-encoding) owned by the authenticated user
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- `merge_request_iid` (required)            - Internal ID of MR
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- `merge_commit_message` (optional)         - Custom merge commit message
- `should_remove_source_branch` (optional)  - if `true` removes the source branch
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- `merge_when_pipeline_succeeds` (optional) - if `true` the MR is merged when the pipeline succeeds
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- `sha` (optional)                          - if present, then this SHA must match the HEAD of the source branch, otherwise the merge will fail
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```json
{
  "id": 1,
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  "iid": 1,
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  "project_id": 3,
  "title": "test1",
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  "description": "fixed login page css paddings",
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  "state": "merged",
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  "created_at": "2017-04-29T08:46:00Z",
  "updated_at": "2017-04-29T08:46:00Z",
  "target_branch": "master",
  "source_branch": "test1",
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  "upvotes": 0,
  "downvotes": 0,
  "author": {
    "id": 1,
    "name": "Administrator",
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    "username": "admin",
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    "state": "active",
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    "avatar_url": null,
    "web_url" : "https://gitlab.example.com/admin"
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  },
  "assignee": {
    "id": 1,
    "name": "Administrator",
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    "username": "admin",
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    "state": "active",
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    "avatar_url": null,
    "web_url" : "https://gitlab.example.com/admin"
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  },
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  "source_project_id": 2,
  "target_project_id": 3,
  "labels": [
    "Community contribution",
    "Manage"
  ],
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  "work_in_progress": false,
  "milestone": {
    "id": 5,
    "iid": 1,
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    "project_id": 3,
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    "title": "v2.0",
    "description": "Assumenda aut placeat expedita exercitationem labore sunt enim earum.",
    "state": "closed",
    "created_at": "2015-02-02T19:49:26.013Z",
    "updated_at": "2015-02-02T19:49:26.013Z",
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    "due_date": "2018-09-22",
    "start_date": "2018-08-08",
    "web_url": "https://gitlab.example.com/my-group/my-project/milestones/1"
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  },
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  "merge_when_pipeline_succeeds": true,
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  "merge_status": "can_be_merged",
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  "merge_error": null,
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  "sha": "8888888888888888888888888888888888888888",
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  "merge_commit_sha": null,
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  "user_notes_count": 1,
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  "discussion_locked": null,
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  "should_remove_source_branch": true,
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  "force_remove_source_branch": false,
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  "allow_collaboration": false,
  "allow_maintainer_to_push": false,
  "web_url": "http://gitlab.example.com/my-group/my-project/merge_requests/1",
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  "time_stats": {
    "time_estimate": 0,
    "total_time_spent": 0,
    "human_time_estimate": null,
    "human_total_time_spent": null
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  },
  "squash": false,
  "subscribed": false,
  "changes_count": "1",
  "merged_by": {
    "id": 87854,
    "name": "Douwe Maan",
    "username": "DouweM",
    "state": "active",
    "avatar_url": "https://gitlab.example.com/uploads/-/system/user/avatar/87854/avatar.png",
    "web_url": "https://gitlab.com/DouweM"
  },
  "merged_at": "2018-09-07T11:16:17.520Z",
  "closed_by": null,
  "closed_at": null,
  "latest_build_started_at": "2018-09-07T07:27:38.472Z",
  "latest_build_finished_at": "2018-09-07T08:07:06.012Z",
  "first_deployed_to_production_at": null,
  "pipeline": {
    "id": 29626725,
    "sha": "2be7ddb704c7b6b83732fdd5b9f09d5a397b5f8f",
    "ref": "patch-28",
    "status": "success",
    "web_url": "https://gitlab.example.com/my-group/my-project/pipelines/29626725"
  },
  "diff_refs": {
    "base_sha": "c380d3acebd181f13629a25d2e2acca46ffe1e00",
    "head_sha": "2be7ddb704c7b6b83732fdd5b9f09d5a397b5f8f",
    "start_sha": "c380d3acebd181f13629a25d2e2acca46ffe1e00"
  },
  "diverged_commits_count": 2
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}
```

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## Cancel Merge When Pipeline Succeeds
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If you don't have permissions to accept this merge request - you'll get a `401`
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If the merge request is already merged or closed - you get `405` and error message 'Method Not Allowed'
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In case the merge request is not set to be merged when the pipeline succeeds, you'll also get a `406` error.
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```
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PUT /projects/:id/merge_requests/:merge_request_iid/cancel_merge_when_pipeline_succeeds
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```
Parameters:

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- `id` (required) - The ID or [URL-encoded path of the project](README.md#namespaced-path-encoding) owned by the authenticated user
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- `merge_request_iid` (required) - Internal ID of MR
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```json
{
  "id": 1,
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  "iid": 1,
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  "project_id": 3,
  "title": "test1",
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  "description": "fixed login page css paddings",
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  "state": "merged",
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  "created_at": "2017-04-29T08:46:00Z",
  "updated_at": "2017-04-29T08:46:00Z",
  "target_branch": "master",
  "source_branch": "test1",
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  "upvotes": 0,
  "downvotes": 0,
  "author": {
    "id": 1,
    "name": "Administrator",
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    "username": "admin",
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    "state": "active",
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    "avatar_url": null,
    "web_url" : "https://gitlab.example.com/admin"
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  },
  "assignee": {
    "id": 1,
    "name": "Administrator",
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    "username": "admin",
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    "state": "active",
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    "avatar_url": null,
    "web_url" : "https://gitlab.example.com/admin"
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  },
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  "source_project_id": 2,
  "target_project_id": 3,
  "labels": [
    "Community contribution",
    "Manage"
  ],
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  "work_in_progress": false,
  "milestone": {
    "id": 5,
    "iid": 1,
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    "project_id": 3,
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    "title": "v2.0",
    "description": "Assumenda aut placeat expedita exercitationem labore sunt enim earum.",
    "state": "closed",
    "created_at": "2015-02-02T19:49:26.013Z",
    "updated_at": "2015-02-02T19:49:26.013Z",
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    "due_date": "2018-09-22",
    "start_date": "2018-08-08",
    "web_url": "https://gitlab.example.com/my-group/my-project/milestones/1"
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  },
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  "merge_when_pipeline_succeeds": false,