Merge Trains API

Tier: Premium, Ultimate
Offering: GitLab.com, GitLab Self-Managed, GitLab Dedicated

Every API call for merge train must be authenticated with at least the Developer role.

If a user is not a member of a project and the project is private, a GET request on that project returns a 404 status code.

If Merge Trains is not available for the project, a 403 status code is returned.

Merge Trains API pagination

By default, GET requests return 20 results at a time because the API results are paginated.

For more information, see pagination.

List Merge Trains for a project

Get all Merge Trains of the requested project:

GET /projects/:id/merge_trains
GET /projects/:id/merge_trains?scope=complete

Attribute	Type	Required	Description
`id`	integer/string	Yes	The ID or URL-encoded path of the project.
`scope`	string	No	Return Merge Trains filtered by the given scope. Available scopes are `active` (to be merged) and `complete` (have been merged).
`sort`	string	No	Return Merge Trains sorted in `asc` or `desc` order. Default: `desc`.

curl --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/projects/1/merge_trains"

Example response:

[
  {
    "id": 110,
    "merge_request": {
      "id": 126,
      "iid": 59,
      "project_id": 20,
      "title": "Test MR 1580978354",
      "description": "",
      "state": "merged",
      "created_at": "2020-02-06T08:39:14.883Z",
      "updated_at": "2020-02-06T08:40:57.038Z",
      "web_url": "http://local.gitlab.test:8181/root/merge-train-race-condition/-/merge_requests/59"
    },
    "user": {
      "id": 1,
      "name": "Administrator",
      "username": "root",
      "state": "active",
      "avatar_url": "https://www.gravatar.com/avatar/e64c7d89f26bd1972efa854d13d7dd61?s=80&d=identicon",
      "web_url": "http://local.gitlab.test:8181/root"
    },
    "pipeline": {
      "id": 246,
      "sha": "bcc17a8ffd51be1afe45605e714085df28b80b13",
      "ref": "refs/merge-requests/59/train",
      "status": "success",
      "created_at": "2020-02-06T08:40:42.410Z",
      "updated_at": "2020-02-06T08:40:46.912Z",
      "web_url": "http://local.gitlab.test:8181/root/merge-train-race-condition/pipelines/246"
    },
    "created_at": "2020-02-06T08:39:47.217Z",
    "updated_at": "2020-02-06T08:40:57.720Z",
    "target_branch": "feature-1580973432",
    "status": "merged",
    "merged_at": "2020-02-06T08:40:57.719Z",
    "duration": 70
  }
]

List merge requests in a merge train

Get all merge requests added to a merge train for the requested target branch.

GET /projects/:id/merge_trains/:target_branch

Supported attributes:

Attribute	Type	Required	Description
`id`	integer/string	Yes	The ID or URL-encoded path of the project.
`target_branch`	string	Yes	The target branch of the merge train.
`scope`	string	No	Return Merge Trains filtered by the given scope. Available scopes are `active` (to be merged) and `complete` (have been merged).
`sort`	string	No	Return Merge Trains sorted in `asc` or `desc` order. Default: `desc`.

Example request:

curl --request GET --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/projects/597/merge_trains/main"

Example response:

[
  {
    "id": 267,
    "merge_request": {
      "id": 273,
      "iid": 1,
      "project_id": 597,
      "title": "My title 9",
      "description": null,
      "state": "opened",
      "created_at": "2022-10-31T19:06:05.725Z",
      "updated_at": "2022-10-31T19:06:05.725Z",
      "web_url": "http://localhost/namespace18/project21/-/merge_requests/1"
    },
    "user": {
      "id": 933,
      "username": "user12",
      "name": "Sidney Jones31",
      "state": "active",
      "avatar_url": "https://www.gravatar.com/avatar/6c8365de387cb3db10ecc7b1880203c4?s=80\u0026d=identicon",
      "web_url": "http://localhost/user12"
    },
    "pipeline": {
      "id": 273,
      "iid": 1,
      "project_id": 598,
      "sha": "b83d6e391c22777fca1ed3012fce84f633d7fed0",
      "ref": "main",
      "status": "pending",
      "source": "push",
      "created_at": "2022-10-31T19:06:06.231Z",
      "updated_at": "2022-10-31T19:06:06.231Z",
      "web_url": "http://localhost/namespace19/project22/-/pipelines/273"
    },
    "created_at": "2022-10-31T19:06:06.237Z",
    "updated_at":"2022-10-31T19:06:06.237Z",
    "target_branch":"main",
    "status":"idle",
    "merged_at":null,
    "duration":null
  }
]

Get the status of a merge request on a merge train

Get merge train information for the requested merge request.

GET /projects/:id/merge_trains/merge_requests/:merge_request_iid

Supported attributes:

Attribute	Type	Required	Description
`id`	integer/string	Yes	The ID or URL-encoded path of the project.
`merge_request_iid`	integer	Yes	The internal ID of the merge request.

Example request:

curl --request GET --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/projects/597/merge_trains/merge_requests/1"

Example response:

{
  "id": 267,
  "merge_request": {
    "id": 273,
    "iid": 1,
    "project_id": 597,
    "title": "My title 9",
    "description": null,
    "state": "opened",
    "created_at": "2022-10-31T19:06:05.725Z",
    "updated_at": "2022-10-31T19:06:05.725Z",
    "web_url": "http://localhost/namespace18/project21/-/merge_requests/1"
  },
  "user": {
    "id": 933,
    "username": "user12",
    "name": "Sidney Jones31",
    "state": "active",
    "avatar_url": "https://www.gravatar.com/avatar/6c8365de387cb3db10ecc7b1880203c4?s=80\u0026d=identicon",
    "web_url": "http://localhost/user12"
  },
  "pipeline": {
    "id": 273,
    "iid": 1,
    "project_id": 598,
    "sha": "b83d6e391c22777fca1ed3012fce84f633d7fed0",
    "ref": "main",
    "status": "pending",
    "source": "push",
    "created_at": "2022-10-31T19:06:06.231Z",
    "updated_at": "2022-10-31T19:06:06.231Z",
    "web_url": "http://localhost/namespace19/project22/-/pipelines/273"
  },
  "created_at": "2022-10-31T19:06:06.237Z",
  "updated_at":"2022-10-31T19:06:06.237Z",
  "target_branch":"main",
  "status":"idle",
  "merged_at":null,
  "duration":null
}

Add a merge request to a merge train

Add a merge request to the merge train targeting the merge request’s target branch.

POST /projects/:id/merge_trains/merge_requests/:merge_request_iid

Supported attributes:

Attribute	Type	Required	Description
`id`	integer/string	Yes	The ID or URL-encoded path of the project.
`merge_request_iid`	integer	Yes	The internal ID of the merge request.
`sha`	string	No	If present, the SHA must match the `HEAD` of the source branch, otherwise the merge fails.
`squash`	boolean	No	If true, the commits are squashed into a single commit on merge.
`when_pipeline_succeeds`	boolean	No	If true, the merge request is added to the merge train when the pipeline succeeds. When false or unspecified, the merge request is added directly to the merge train.

Example request:

curl --request POST --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/projects/597/merge_trains/merge_requests/1"

Example response:

[
  {
    "id": 267,
    "merge_request": {
      "id": 273,
      "iid": 1,
      "project_id": 597,
      "title": "My title 9",
      "description": null,
      "state": "opened",
      "created_at": "2022-10-31T19:06:05.725Z",
      "updated_at": "2022-10-31T19:06:05.725Z",
      "web_url": "http://localhost/namespace18/project21/-/merge_requests/1"
    },
    "user": {
      "id": 933,
      "username": "user12",
      "name": "Sidney Jones31",
      "state": "active",
      "avatar_url": "https://www.gravatar.com/avatar/6c8365de387cb3db10ecc7b1880203c4?s=80\u0026d=identicon",
      "web_url": "http://localhost/user12"
    },
    "pipeline": {
      "id": 273,
      "iid": 1,
      "project_id": 598,
      "sha": "b83d6e391c22777fca1ed3012fce84f633d7fed0",
      "ref": "main",
      "status": "pending",
      "source": "push",
      "created_at": "2022-10-31T19:06:06.231Z",
      "updated_at": "2022-10-31T19:06:06.231Z",
      "web_url": "http://localhost/namespace19/project22/-/pipelines/273"
    },
    "created_at": "2022-10-31T19:06:06.237Z",
    "updated_at":"2022-10-31T19:06:06.237Z",
    "target_branch":"main",
    "status":"idle",
    "merged_at":null,
    "duration":null
  }
]

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Merge Trains API

Merge Trains API pagination

List Merge Trains for a project

List merge requests in a merge train

Get the status of a merge request on a merge train

Add a merge request to a merge train

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