# Merge requests

## List merge requests

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

```
GET /projects/:id/merge_requests
GET /projects/:id/merge_requests?state=opened
GET /projects/:id/merge_requests?state=all
GET /projects/:id/merge_requests?iids[]=42&iids[]=43
```

Parameters:

- `id` (required) - The ID of a project
- `iid` (optional) - Return the request having the given `iid`
- `state` (optional) - Return `all` requests or just those that are `merged`, `opened` or `closed`
- `order_by` (optional) - Return requests ordered by `created_at` or `updated_at` fields. Default is `created_at`
- `sort` (optional) - Return requests sorted in `asc` or `desc` order. Default is `desc`

```json
[
  {
    "id": 1,
    "iid": 1,
    "target_branch": "master",
    "source_branch": "test1",
    "project_id": 3,
    "title": "test1",
    "state": "opened",
    "upvotes": 0,
    "downvotes": 0,
    "author": {
      "id": 1,
      "username": "admin",
      "email": "admin@example.com",
      "name": "Administrator",
      "state": "active",
      "created_at": "2012-04-29T08:46:00Z"
    },
    "assignee": {
      "id": 1,
      "username": "admin",
      "email": "admin@example.com",
      "name": "Administrator",
      "state": "active",
      "created_at": "2012-04-29T08:46:00Z"
    },
    "source_project_id": 2,
    "target_project_id": 3,
    "labels": [ ],
    "description": "fixed login page css paddings",
    "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",
      "due_date": null
    },
    "merge_when_build_succeeds": true,
    "merge_status": "can_be_merged",
    "subscribed" : false,
    "sha": "8888888888888888888888888888888888888888",
    "merge_commit_sha": null,
    "user_notes_count": 1,
    "should_remove_source_branch": true,
    "force_remove_source_branch": false,
    "web_url": "http://example.com/example/example/merge_requests/1"
  }
]
```

## Get single MR

Shows information about a single merge request.

```
GET /projects/:id/merge_requests/:merge_request_id
```

Parameters:

- `id` (required) - The ID of a project
- `merge_request_id` (required) - The ID of MR

```json
{
  "id": 1,
  "iid": 1,
  "target_branch": "master",
  "source_branch": "test1",
  "project_id": 3,
  "title": "test1",
  "state": "merged",
  "upvotes": 0,
  "downvotes": 0,
  "author": {
    "id": 1,
    "username": "admin",
    "email": "admin@example.com",
    "name": "Administrator",
    "state": "active",
    "created_at": "2012-04-29T08:46:00Z"
  },
  "assignee": {
    "id": 1,
    "username": "admin",
    "email": "admin@example.com",
    "name": "Administrator",
    "state": "active",
    "created_at": "2012-04-29T08:46:00Z"
  },
  "source_project_id": 2,
  "target_project_id": 3,
  "labels": [ ],
  "description": "fixed login page css paddings",
  "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",
    "due_date": null
  },
  "merge_when_build_succeeds": true,
  "merge_status": "can_be_merged",
  "subscribed" : true,
  "sha": "8888888888888888888888888888888888888888",
  "merge_commit_sha": "9999999999999999999999999999999999999999",
  "user_notes_count": 1,
  "should_remove_source_branch": true,
  "force_remove_source_branch": false,
  "web_url": "http://example.com/example/example/merge_requests/1"
}
```

## Get single MR commits

Get a list of merge request commits.

```
GET /projects/:id/merge_requests/:merge_request_id/commits
```

Parameters:

- `id` (required) - The ID of a project
- `merge_request_id` (required) - The ID of MR


```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",
    "message": "Replace sanitize with escape once"
  },
  {
    "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",
    "message": "Sanitize for network graph"
  }
]
```

## Get single MR changes

Shows information about the merge request including its files and changes.

```
GET /projects/:id/merge_requests/:merge_request_id/changes
```

Parameters:

- `id` (required) - The ID of a project
- `merge_request_id` (required) - The ID of MR

```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",
    "avatar_url": "http://www.gravatar.com/avatar/b95567800f828948baf5f4160ebb2473?s=40&d=identicon"
  },
  "assignee": {
    "name": "Administrator",
    "username": "root",
    "id": 1,
    "state": "active",
    "avatar_url": "http://www.gravatar.com/avatar/e64c7d89f26bd1972efa854d13d7dd61?s=40&d=identicon"
  },
  "source_project_id": 4,
  "target_project_id": 4,
  "labels": [ ],
  "description": "Qui voluptatibus placeat ipsa alias quasi. Deleniti rem ut sint. Optio velit qui distinctio.",
  "work_in_progress": false,
  "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
  },
  "merge_when_build_succeeds": true,
  "merge_status": "can_be_merged",
  "subscribed" : true,
  "sha": "8888888888888888888888888888888888888888",
  "merge_commit_sha": null,
  "user_notes_count": 1,
  "should_remove_source_branch": true,
  "force_remove_source_branch": false,
  "web_url": "http://example.com/example/example/merge_requests/1",
  "changes": [
    {
    "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
    }
  ]
}
```

## Create MR

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

| Attribute | Type | Required | Description |
| --------- | ---- | -------- | ----------- |
| `id`            | string  | yes | The ID of a project |
| `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 |
| `milestone_id` | integer  | no | The ID of a milestone |
| `remove_source_branch` | boolean  | no | Flag indicating if a merge request should remove the source branch when merging |

```json
{
  "id": 1,
  "iid": 1,
  "target_branch": "master",
  "source_branch": "test1",
  "project_id": 3,
  "title": "test1",
  "state": "opened",
  "upvotes": 0,
  "downvotes": 0,
  "author": {
    "id": 1,
    "username": "admin",
    "email": "admin@example.com",
    "name": "Administrator",
    "state": "active",
    "created_at": "2012-04-29T08:46:00Z"
  },
  "assignee": {
    "id": 1,
    "username": "admin",
    "email": "admin@example.com",
    "name": "Administrator",
    "state": "active",
    "created_at": "2012-04-29T08:46:00Z"
  },
  "source_project_id": 4,
  "target_project_id": 4,
  "labels": [ ],
  "description": "fixed login page css paddings",
  "work_in_progress": false,
  "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
  },
  "merge_when_build_succeeds": true,
  "merge_status": "can_be_merged",
  "subscribed" : true,
  "sha": "8888888888888888888888888888888888888888",
  "merge_commit_sha": null,
  "user_notes_count": 0,
  "should_remove_source_branch": true,
  "force_remove_source_branch": false,
  "web_url": "http://example.com/example/example/merge_requests/1"
}
```

## Update MR

Updates an existing merge request. You can change the target branch, title, or even close the MR.

```
PUT /projects/:id/merge_requests/:merge_request_id
```

| Attribute | Type | Required | Description |
| --------- | ---- | -------- | ----------- |
| `id`            | string  | yes | The ID of a project |
| `merge_request_id` | 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  | Assignee user ID |
| `description`   | string  | no  | Description of MR |
| `state_event` | string  | no | New state (close/reopen) |
| `labels` | string  | no | Labels for MR as a comma-separated list |
| `milestone_id` | integer  | no | The ID of a milestone |
| `remove_source_branch` | boolean  | no | Flag indicating if a merge request should remove the source branch when merging |

Must include at least one non-required attribute from above.

```json
{
  "id": 1,
  "iid": 1,
  "target_branch": "master",
  "project_id": 3,
  "title": "test1",
  "state": "opened",
  "upvotes": 0,
  "downvotes": 0,
  "author": {
    "id": 1,
    "username": "admin",
    "email": "admin@example.com",
    "name": "Administrator",
    "state": "active",
    "created_at": "2012-04-29T08:46:00Z"
  },
  "assignee": {
    "id": 1,
    "username": "admin",
    "email": "admin@example.com",
    "name": "Administrator",
    "state": "active",
    "created_at": "2012-04-29T08:46:00Z"
  },
  "source_project_id": 4,
  "target_project_id": 4,
  "labels": [ ],
  "description": "description1",
  "work_in_progress": false,
  "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
  },
  "merge_when_build_succeeds": true,
  "merge_status": "can_be_merged",
  "subscribed" : true,
  "sha": "8888888888888888888888888888888888888888",
  "merge_commit_sha": null,
  "user_notes_count": 1,
  "should_remove_source_branch": true,
  "force_remove_source_branch": false,
  "web_url": "http://example.com/example/example/merge_requests/1"
}
```

## Delete a merge request

Only for admins and project owners. Soft deletes the merge request in question.

```
DELETE /projects/:id/merge_requests/:merge_request_id
```

| Attribute | Type | Required | Description |
| --------- | ---- | -------- | ----------- |
| `id`            | integer | yes | The ID of a project |
| `merge_request_id` | integer | yes | The ID of a project's merge request |

```bash
curl --request DELETE --header "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" https://gitlab.example.com/api/v3/projects/4/merge_requests/85
```

## Accept MR

Merge changes submitted with MR using this API.


If it has some conflicts and can not be merged - you'll get a `405` and the error message 'Branch cannot be merged'

If merge request is already merged or closed - you'll get a `406` and the error message 'Method Not Allowed'

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'

If you don't have permissions to accept this merge request - you'll get a `401`

```
PUT /projects/:id/merge_requests/:merge_request_id/merge
```

Parameters:

- `id` (required)                           - The ID of a project
- `merge_request_id` (required)             - ID of MR
- `merge_commit_message` (optional)         - Custom merge commit message
- `should_remove_source_branch` (optional)  - if `true` removes the source branch
- `merge_when_build_succeeds` (optional)    - if `true` the MR is merged when the build succeeds
- `sha` (optional)                          - if present, then this SHA must match the HEAD of the source branch, otherwise the merge will fail

```json
{
  "id": 1,
  "iid": 1,
  "target_branch": "master",
  "source_branch": "test1",
  "project_id": 3,
  "title": "test1",
  "state": "merged",
  "upvotes": 0,
  "downvotes": 0,
  "author": {
    "id": 1,
    "username": "admin",
    "email": "admin@example.com",
    "name": "Administrator",
    "state": "active",
    "created_at": "2012-04-29T08:46:00Z"
  },
  "assignee": {
    "id": 1,
    "username": "admin",
    "email": "admin@example.com",
    "name": "Administrator",
    "state": "active",
    "created_at": "2012-04-29T08:46:00Z"
  },
  "source_project_id": 4,
  "target_project_id": 4,
  "labels": [ ],
  "description": "fixed login page css paddings",
  "work_in_progress": false,
  "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
  },
  "merge_when_build_succeeds": true,
  "merge_status": "can_be_merged",
  "subscribed" : true,
  "sha": "8888888888888888888888888888888888888888",
  "merge_commit_sha": "9999999999999999999999999999999999999999",
  "user_notes_count": 1,
  "should_remove_source_branch": true,
  "force_remove_source_branch": false,
  "web_url": "http://example.com/example/example/merge_requests/1"
}
```

## Cancel Merge When Pipeline Succeeds

If you don't have permissions to accept this merge request - you'll get a `401`

If the merge request is already merged or closed - you get `405` and error message 'Method Not Allowed'

In case the merge request is not set to be merged when the build succeeds, you'll also get a `406` error.
```
PUT /projects/:id/merge_requests/:merge_request_id/cancel_merge_when_build_succeeds
```
Parameters:

- `id` (required)                           - The ID of a project
- `merge_request_id` (required)             - ID of MR

```json
{
  "id": 1,
  "iid": 1,
  "target_branch": "master",
  "source_branch": "test1",
  "project_id": 3,
  "title": "test1",
  "state": "opened",
  "upvotes": 0,
  "downvotes": 0,
  "author": {
    "id": 1,
    "username": "admin",
    "email": "admin@example.com",
    "name": "Administrator",
    "state": "active",
    "created_at": "2012-04-29T08:46:00Z"
  },
  "assignee": {
    "id": 1,
    "username": "admin",
    "email": "admin@example.com",
    "name": "Administrator",
    "state": "active",
    "created_at": "2012-04-29T08:46:00Z"
  },
  "source_project_id": 4,
  "target_project_id": 4,
  "labels": [ ],
  "description": "fixed login page css paddings",
  "work_in_progress": false,
  "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
  },
  "merge_when_build_succeeds": true,
  "merge_status": "can_be_merged",
  "subscribed" : true,
  "sha": "8888888888888888888888888888888888888888",
  "merge_commit_sha": null,
  "user_notes_count": 1,
  "should_remove_source_branch": true,
  "force_remove_source_branch": false,
  "web_url": "http://example.com/example/example/merge_requests/1"
}
```

## Comments on merge requests

Comments are done via the [notes](notes.md) resource.

## List issues that will close on merge

Get all the issues that would be closed by merging the provided merge request.

```
GET /projects/:id/merge_requests/:merge_request_id/closes_issues
```

| Attribute | Type | Required | Description |
| --------- | ---- | -------- | ----------- |
| `id`      | integer | yes   | The ID of a project |
| `merge_request_id` | integer | yes   | The ID of the merge request |

```bash
curl --header "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" https://gitlab.example.com/api/v3/projects/76/merge_requests/1/closes_issues
```

Example response when the GitLab issue tracker is used:

```json
[
   {
      "state" : "opened",
      "description" : "Ratione dolores corrupti mollitia soluta quia.",
      "author" : {
         "state" : "active",
         "id" : 18,
         "web_url" : "https://gitlab.example.com/eileen.lowe",
         "name" : "Alexandra Bashirian",
         "avatar_url" : null,
         "username" : "eileen.lowe"
      },
      "milestone" : {
         "project_id" : 1,
         "description" : "Ducimus nam enim ex consequatur cumque ratione.",
         "state" : "closed",
         "due_date" : null,
         "iid" : 2,
         "created_at" : "2016-01-04T15:31:39.996Z",
         "title" : "v4.0",
         "id" : 17,
         "updated_at" : "2016-01-04T15:31:39.996Z"
      },
      "project_id" : 1,
      "assignee" : {
         "state" : "active",
         "id" : 1,
         "name" : "Administrator",
         "web_url" : "https://gitlab.example.com/root",
         "avatar_url" : null,
         "username" : "root"
      },
      "updated_at" : "2016-01-04T15:31:51.081Z",
      "id" : 76,
      "title" : "Consequatur vero maxime deserunt laboriosam est voluptas dolorem.",
      "created_at" : "2016-01-04T15:31:51.081Z",
      "iid" : 6,
      "labels" : [],
      "user_notes_count": 1
   },
]
```

Example response when an external issue tracker (e.g. JIRA) is used:

```json
[
   {
       "id" : "PROJECT-123",
       "title" : "Title of this issue"
   }
]
```

## Subscribe to a merge request

Subscribes the authenticated user to a merge request to receive notification. If the user is already subscribed to the merge request, the
status code `304` is returned.

```
POST /projects/:id/merge_requests/:merge_request_id/subscription
```

| Attribute | Type | Required | Description |
| --------- | ---- | -------- | ----------- |
| `id` | integer | yes | The ID of a project |
| `merge_request_id` | integer | yes   | The ID of the merge request |

```bash
curl --request POST --header "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" https://gitlab.example.com/api/v3/projects/5/merge_requests/17/subscription
```

Example response:

```json
{
  "id": 17,
  "iid": 1,
  "project_id": 5,
  "title": "Et et sequi est impedit nulla ut rem et voluptatem.",
  "description": "Consequatur velit eos rerum optio autem. Quia id officia quaerat dolorum optio. Illo laudantium aut ipsum dolorem.",
  "state": "opened",
  "created_at": "2016-04-05T21:42:23.233Z",
  "updated_at": "2016-04-05T22:11:52.900Z",
  "target_branch": "ui-dev-kit",
  "source_branch": "version-1-9",
  "upvotes": 0,
  "downvotes": 0,
  "author": {
    "name": "Eileen Skiles",
    "username": "leila",
    "id": 19,
    "state": "active",
    "avatar_url": "http://www.gravatar.com/avatar/39ce4a2822cc896933ffbd68c1470e55?s=80&d=identicon",
    "web_url": "https://gitlab.example.com/leila"
  },
  "assignee": {
    "name": "Celine Wehner",
    "username": "carli",
    "id": 16,
    "state": "active",
    "avatar_url": "http://www.gravatar.com/avatar/f4cd5605b769dd2ce405a27c6e6f2684?s=80&d=identicon",
    "web_url": "https://gitlab.example.com/carli"
  },
  "source_project_id": 5,
  "target_project_id": 5,
  "labels": [],
  "work_in_progress": false,
  "milestone": {
    "id": 7,
    "iid": 1,
    "project_id": 5,
    "title": "v2.0",
    "description": "Corrupti eveniet et velit occaecati dolorem est rerum aut.",
    "state": "closed",
    "created_at": "2016-04-05T21:41:40.905Z",
    "updated_at": "2016-04-05T21:41:40.905Z",
    "due_date": null
  },
  "merge_when_build_succeeds": false,
  "merge_status": "cannot_be_merged",
  "subscribed": true,
  "sha": "8888888888888888888888888888888888888888",
  "merge_commit_sha": null
}
```

## Unsubscribe from a merge request

Unsubscribes the authenticated user from a merge request to not receive
notifications from that merge request. If the user is
not subscribed to the merge request, the status code `304` is returned.

```
DELETE /projects/:id/merge_requests/:merge_request_id/subscription
```

| Attribute | Type | Required | Description |
| --------- | ---- | -------- | ----------- |
| `id` | integer | yes | The ID of a project |
| `merge_request_id` | integer | yes   | The ID of the merge request |

```bash
curl --request DELETE --header "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" https://gitlab.example.com/api/v3/projects/5/merge_requests/17/subscription
```

Example response:

```json
{
  "id": 17,
  "iid": 1,
  "project_id": 5,
  "title": "Et et sequi est impedit nulla ut rem et voluptatem.",
  "description": "Consequatur velit eos rerum optio autem. Quia id officia quaerat dolorum optio. Illo laudantium aut ipsum dolorem.",
  "state": "opened",
  "created_at": "2016-04-05T21:42:23.233Z",
  "updated_at": "2016-04-05T22:11:52.900Z",
  "target_branch": "ui-dev-kit",
  "source_branch": "version-1-9",
  "upvotes": 0,
  "downvotes": 0,
  "author": {
    "name": "Eileen Skiles",
    "username": "leila",
    "id": 19,
    "state": "active",
    "avatar_url": "http://www.gravatar.com/avatar/39ce4a2822cc896933ffbd68c1470e55?s=80&d=identicon",
    "web_url": "https://gitlab.example.com/leila"
  },
  "assignee": {
    "name": "Celine Wehner",
    "username": "carli",
    "id": 16,
    "state": "active",
    "avatar_url": "http://www.gravatar.com/avatar/f4cd5605b769dd2ce405a27c6e6f2684?s=80&d=identicon",
    "web_url": "https://gitlab.example.com/carli"
  },
  "source_project_id": 5,
  "target_project_id": 5,
  "labels": [],
  "work_in_progress": false,
  "milestone": {
    "id": 7,
    "iid": 1,
    "project_id": 5,
    "title": "v2.0",
    "description": "Corrupti eveniet et velit occaecati dolorem est rerum aut.",
    "state": "closed",
    "created_at": "2016-04-05T21:41:40.905Z",
    "updated_at": "2016-04-05T21:41:40.905Z",
    "due_date": null
  },
  "merge_when_build_succeeds": false,
  "merge_status": "cannot_be_merged",
  "subscribed": false,
  "sha": "8888888888888888888888888888888888888888",
  "merge_commit_sha": null
}
```

## Create a todo

Manually creates a todo for the current user on a merge request.
If there already exists a todo for the user on that merge request,
status code `304` is returned.

```
POST /projects/:id/merge_requests/:merge_request_id/todo
```

| Attribute | Type | Required | Description |
| --------- | ---- | -------- | ----------- |
| `id` | integer | yes | The ID of a project |
| `merge_request_id` | integer | yes   | The ID of the merge request |

```bash
curl --request POST --header "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" https://gitlab.example.com/api/v3/projects/5/merge_requests/27/todo
```

Example response:

```json
{
  "id": 113,
  "project": {
    "id": 3,
    "name": "Gitlab Ci",
    "name_with_namespace": "Gitlab Org / Gitlab Ci",
    "path": "gitlab-ci",
    "path_with_namespace": "gitlab-org/gitlab-ci"
  },
  "author": {
    "name": "Administrator",
    "username": "root",
    "id": 1,
    "state": "active",
    "avatar_url": "http://www.gravatar.com/avatar/e64c7d89f26bd1972efa854d13d7dd61?s=80&d=identicon",
    "web_url": "https://gitlab.example.com/root"
  },
  "action_name": "marked",
  "target_type": "MergeRequest",
  "target": {
    "id": 27,
    "iid": 7,
    "project_id": 3,
    "title": "Et voluptas laudantium minus nihil recusandae ut accusamus earum aut non.",
    "description": "Veniam sunt nihil modi earum cumque illum delectus. Nihil ad quis distinctio quia. Autem eligendi at quibusdam repellendus.",
    "state": "opened",
    "created_at": "2016-06-17T07:48:04.330Z",
    "updated_at": "2016-07-01T11:14:15.537Z",
    "target_branch": "allow_regex_for_project_skip_ref",
    "source_branch": "backup",
    "upvotes": 0,
    "downvotes": 0,
    "author": {
      "name": "Jarret O'Keefe",
      "username": "francisca",
      "id": 14,
      "state": "active",
      "avatar_url": "http://www.gravatar.com/avatar/a7fa515d53450023c83d62986d0658a8?s=80&d=identicon",
      "web_url": "https://gitlab.example.com/francisca"
    },
    "assignee": {
      "name": "Dr. Gabrielle Strosin",
      "username": "barrett.krajcik",
      "id": 4,
      "state": "active",
      "avatar_url": "http://www.gravatar.com/avatar/733005fcd7e6df12d2d8580171ccb966?s=80&d=identicon",
      "web_url": "https://gitlab.example.com/barrett.krajcik"
    },
    "source_project_id": 3,
    "target_project_id": 3,
    "labels": [],
    "work_in_progress": false,
    "milestone": {
      "id": 27,
      "iid": 2,
      "project_id": 3,
      "title": "v1.0",
      "description": "Quis ea accusantium animi hic fuga assumenda.",
      "state": "active",
      "created_at": "2016-06-17T07:47:33.840Z",
      "updated_at": "2016-06-17T07:47:33.840Z",
      "due_date": null
    },
    "merge_when_build_succeeds": false,
    "merge_status": "unchecked",
    "subscribed": true,
    "sha": "8888888888888888888888888888888888888888",
    "merge_commit_sha": null,
    "user_notes_count": 7,
    "should_remove_source_branch": true,
    "force_remove_source_branch": false,
    "web_url": "http://example.com/example/example/merge_requests/1"
  },
  "target_url": "https://gitlab.example.com/gitlab-org/gitlab-ci/merge_requests/7",
  "body": "Et voluptas laudantium minus nihil recusandae ut accusamus earum aut non.",
  "state": "pending",
  "created_at": "2016-07-01T11:14:15.530Z"
}
```

## Get MR diff versions

Get a list of merge request diff versions.

```
GET /projects/:id/merge_requests/:merge_request_id/versions
```

| Attribute | Type    | Required | Description           |
| --------- | ------- | -------- | --------------------- |
| `id`      | String  | yes      | The ID of the project |
| `merge_request_id` | integer | yes | The ID of the merge request |

```bash
curl --header "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" https://gitlab.example.com/api/v3/projects/1/merge_requests/1/versions
```

Example response:

```json
[{
  "id": 110,
  "head_commit_sha": "33e2ee8579fda5bc36accc9c6fbd0b4fefda9e30",
  "base_commit_sha": "eeb57dffe83deb686a60a71c16c32f71046868fd",
  "start_commit_sha": "eeb57dffe83deb686a60a71c16c32f71046868fd",
  "created_at": "2016-07-26T14:44:48.926Z",
  "merge_request_id": 105,
  "state": "collected",
  "real_size": "1"
}, {
  "id": 108,
  "head_commit_sha": "3eed087b29835c48015768f839d76e5ea8f07a24",
  "base_commit_sha": "eeb57dffe83deb686a60a71c16c32f71046868fd",
  "start_commit_sha": "eeb57dffe83deb686a60a71c16c32f71046868fd",
  "created_at": "2016-07-25T14:21:33.028Z",
  "merge_request_id": 105,
  "state": "collected",
  "real_size": "1"
}]
```

## Get a single MR diff version

Get a single merge request diff version.

```
GET /projects/:id/merge_requests/:merge_request_id/versions/:version_id
```

| Attribute | Type    | Required | Description           |
| --------- | ------- | -------- | --------------------- |
| `id`      | String  | yes      | The ID of the project |
| `merge_request_id` | integer | yes | The ID of the merge request |
| `version_id` | integer | yes | The ID of the merge request diff version |

```bash
curl --header "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" https://gitlab.example.com/api/v3/projects/1/merge_requests/1/versions/1
```

Example response:

```json
{
  "id": 110,
  "head_commit_sha": "33e2ee8579fda5bc36accc9c6fbd0b4fefda9e30",
  "base_commit_sha": "eeb57dffe83deb686a60a71c16c32f71046868fd",
  "start_commit_sha": "eeb57dffe83deb686a60a71c16c32f71046868fd",
  "created_at": "2016-07-26T14:44:48.926Z",
  "merge_request_id": 105,
  "state": "collected",
  "real_size": "1",
  "commits": [{
    "id": "33e2ee8579fda5bc36accc9c6fbd0b4fefda9e30",
    "short_id": "33e2ee85",
    "title": "Change year to 2018",
    "author_name": "Administrator",
    "author_email": "admin@example.com",
    "created_at": "2016-07-26T17:44:29.000+03:00",
    "message": "Change year to 2018"
  }, {
    "id": "aa24655de48b36335556ac8a3cd8bb521f977cbd",
    "short_id": "aa24655d",
    "title": "Update LICENSE",
    "author_name": "Administrator",
    "author_email": "admin@example.com",
    "created_at": "2016-07-25T17:21:53.000+03:00",
    "message": "Update LICENSE"
  }, {
    "id": "3eed087b29835c48015768f839d76e5ea8f07a24",
    "short_id": "3eed087b",
    "title": "Add license",
    "author_name": "Administrator",
    "author_email": "admin@example.com",
    "created_at": "2016-07-25T17:21:20.000+03:00",
    "message": "Add license"
  }],
  "diffs": [{
    "old_path": "LICENSE",
    "new_path": "LICENSE",
    "a_mode": "0",
    "b_mode": "100644",
    "diff": "--- /dev/null\n+++ b/LICENSE\n@@ -0,0 +1,21 @@\n+The MIT License (MIT)\n+\n+Copyright (c) 2018 Administrator\n+\n+Permission is hereby granted, free of charge, to any person obtaining a copy\n+of this software and associated documentation files (the \"Software\"), to deal\n+in the Software without restriction, including without limitation the rights\n+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n+copies of the Software, and to permit persons to whom the Software is\n+furnished to do so, subject to the following conditions:\n+\n+The above copyright notice and this permission notice shall be included in all\n+copies or substantial portions of the Software.\n+\n+THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\n+SOFTWARE.\n",
    "new_file": true,
    "renamed_file": false,
    "deleted_file": false
  }]
}
```
## Set a time estimate for a merge request

Sets an estimated time of work for this merge request.

```
POST /projects/:id/merge_requests/:merge_request_id/time_estimate
```

| Attribute | Type | Required | Description |
| --------- | ---- | -------- | ----------- |
| `id`      | integer | yes   | The ID of a project |
| `merge_request_id` | integer | yes | The ID of a project's merge request |
| `duration` | string | yes | The duration in human format. e.g: 3h30m |

```bash
curl --request POST --header "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" https://gitlab.example.com/api/v3/projects/5/merge_requests/93/time_estimate?duration=3h30m
```

Example response:

```json
{
  "human_time_estimate": "3h 30m",
  "human_total_time_spent": null,
  "time_estimate": 12600,
  "total_time_spent": 0
}
```

## Reset the time estimate for a merge request

Resets the estimated time for this merge request to 0 seconds.

```
POST /projects/:id/merge_requests/:merge_request_id/reset_time_estimate
```

| Attribute | Type | Required | Description |
| --------- | ---- | -------- | ----------- |
| `id`      | integer | yes   | The ID of a project |
| `merge_request_id` | integer | yes | The ID of a project's merge_request |

```bash
curl --request POST --header "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" https://gitlab.example.com/api/v3/projects/5/merge_requests/93/reset_time_estimate
```

Example response:

```json
{
  "human_time_estimate": null,
  "human_total_time_spent": null,
  "time_estimate": 0,
  "total_time_spent": 0
}
```

## Add spent time for a merge request

Adds spent time for this merge request

```
POST /projects/:id/merge_requests/:merge_request_id/add_spent_time
```

| Attribute | Type | Required | Description |
| --------- | ---- | -------- | ----------- |
| `id`      | integer | yes   | The ID of a project |
| `merge_request_id` | integer | yes | The ID of a project's merge request |
| `duration` | string | yes | The duration in human format. e.g: 3h30m |

```bash
curl --request POST --header "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" https://gitlab.example.com/api/v3/projects/5/merge_requests/93/add_spent_time?duration=1h
```

Example response:

```json
{
  "human_time_estimate": null,
  "human_total_time_spent": "1h",
  "time_estimate": 0,
  "total_time_spent": 3600
}
```

## Reset spent time for a merge request

Resets the total spent time for this merge request to 0 seconds.

```
POST /projects/:id/merge_requests/:merge_request_id/reset_spent_time
```

| Attribute | Type | Required | Description |
| --------- | ---- | -------- | ----------- |
| `id`      | integer | yes   | The ID of a project |
| `merge_request_id` | integer | yes | The ID of a project's merge_request |

```bash
curl --request POST --header "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" https://gitlab.example.com/api/v3/projects/5/merge_requests/93/reset_spent_time
```

Example response:

```json
{
  "human_time_estimate": null,
  "human_total_time_spent": null,
  "time_estimate": 0,
  "total_time_spent": 0
}
```

## Get time tracking stats

```
GET /projects/:id/merge_requests/:merge_request_id/time_stats
```

| Attribute | Type | Required | Description |
| --------- | ---- | -------- | ----------- |
| `id`      | integer | yes   | The ID of a project |
| `merge_request_id` | integer | yes | The ID of a project's merge request |

```bash
curl --request GET --header "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" https://gitlab.example.com/api/v3/projects/5/merge_requests/93/time_stats
```

Example response:

```json
{
  "human_time_estimate": "2h",
  "human_total_time_spent": "1h",
  "time_estimate": 7200,
  "total_time_spent": 3600
}
```