gitlab-org--gitlab-foss/doc/api/epic_links.md

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---
stage: Plan
group: Product Planning
info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
---
# Epic Links API **(ULTIMATE)**
> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/9188) in GitLab 11.8.
Manages parent-child [epic relationships](../user/group/epics/manage_epics.md#multi-level-child-epics).
Every API call to `epic_links` must be authenticated.
If a user is not a member of a private group, a `GET` request on that
group results in a `404` status code.
Multi-level Epics are available only in GitLab [Ultimate](https://about.gitlab.com/pricing/).
If the Multi-level Epics feature is not available, a `403` status code is returned.
## List epics related to a given epic
Gets all child epics of an epic.
```plaintext
GET /groups/:id/epics/:epic_iid/epics
```
| Attribute | Type | Required | Description |
| ---------- | -------------- | -------- | ------------------------------------------------------------------------------------------------------------- |
| `id` | integer/string | yes | The ID or [URL-encoded path of the group](index.md#namespaced-path-encoding) owned by the authenticated user |
| `epic_iid` | integer | yes | The internal ID of the epic. |
```shell
curl --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/groups/1/epics/5/epics/"
```
Example response:
```json
[
{
"id": 29,
"iid": 6,
"group_id": 1,
"parent_id": 5,
"title": "Accusamus iste et ullam ratione voluptatem omnis debitis dolor est.",
"description": "Molestias dolorem eos vitae expedita impedit necessitatibus quo voluptatum.",
"author": {
"id": 10,
"name": "Lu Mayer",
"username": "kam",
"state": "active",
"avatar_url": "http://www.gravatar.com/avatar/018729e129a6f31c80a6327a30196823?s=80&d=identicon",
"web_url": "http://localhost:3001/kam"
},
"start_date": null,
"start_date_is_fixed": false,
"start_date_fixed": null,
"start_date_from_milestones": null, //deprecated in favor of start_date_from_inherited_source
"start_date_from_inherited_source": null,
"end_date": "2018-07-31", //deprecated in favor of due_date
"due_date": "2018-07-31",
"due_date_is_fixed": false,
"due_date_fixed": null,
"due_date_from_milestones": "2018-07-31", //deprecated in favor of start_date_from_inherited_source
"due_date_from_inherited_source": "2018-07-31",
"created_at": "2018-07-17T13:36:22.770Z",
"updated_at": "2018-07-18T12:22:05.239Z",
"labels": []
}
]
```
## Assign a child epic
Creates an association between two epics, designating one as the parent epic and the other as the child epic. A parent epic can have multiple child epics. If the new child epic already belonged to another epic, it is unassigned from that previous parent.
```plaintext
POST /groups/:id/epics/:epic_iid/epics/:child_epic_id
```
| Attribute | Type | Required | Description |
| --------------- | -------------- | -------- | ------------------------------------------------------------------------------------------------------------------ |
| `id` | integer/string | yes | The ID or [URL-encoded path of the group](index.md#namespaced-path-encoding) owned by the authenticated user |
| `epic_iid` | integer | yes | The internal ID of the epic. |
| `child_epic_id` | integer | yes | The global ID of the child epic. Internal ID can't be used because they can conflict with epics from other groups. |
```shell
curl --request POST --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/groups/1/epics/5/epics/6"
```
Example response:
```json
{
"id": 6,
"iid": 38,
"group_id": 1,
"parent_id": 5,
"title": "Accusamus iste et ullam ratione voluptatem omnis debitis dolor est.",
"description": "Molestias dolorem eos vitae expedita impedit necessitatibus quo voluptatum.",
"author": {
"id": 10,
"name": "Lu Mayer",
"username": "kam",
"state": "active",
"avatar_url": "http://www.gravatar.com/avatar/018729e129a6f31c80a6327a30196823?s=80&d=identicon",
"web_url": "http://localhost:3001/kam"
},
"start_date": null,
"start_date_is_fixed": false,
"start_date_fixed": null,
"start_date_from_milestones": null, //deprecated in favor of start_date_from_inherited_source
"start_date_from_inherited_source": null,
"end_date": "2018-07-31", //deprecated in favor of due_date
"due_date": "2018-07-31",
"due_date_is_fixed": false,
"due_date_fixed": null,
"due_date_from_milestones": "2018-07-31", //deprecated in favor of start_date_from_inherited_source
"due_date_from_inherited_source": "2018-07-31",
"created_at": "2018-07-17T13:36:22.770Z",
"updated_at": "2018-07-18T12:22:05.239Z",
"labels": []
}
```
## Create and assign a child epic
Creates a new epic and associates it with provided parent epic. The response is LinkedEpic object.
```plaintext
POST /groups/:id/epics/:epic_iid/epics
```
| Attribute | Type | Required | Description |
| --------------- | -------------- | -------- | ------------------------------------------------------------------------------------------------------------------ |
| `id` | integer/string | yes | The ID or [URL-encoded path of the group](index.md#namespaced-path-encoding) owned by the authenticated user |
| `epic_iid` | integer | yes | The internal ID of the (future parent) epic. |
| `title` | string | yes | The title of a newly created epic. |
| `confidential` | boolean | no | Whether the epic should be confidential. Parameter is ignored if `confidential_epics` feature flag is disabled. Defaults to the confidentiality state of the parent epic. |
```shell
curl --request POST --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/groups/1/epics/5/epics?title=Newpic"
```
Example response:
```json
{
"id": 24,
"iid": 2,
"title": "child epic",
"group_id": 49,
"parent_id": 23,
"has_children": false,
"has_issues": false,
"reference": "&2",
"url": "http://localhost/groups/group16/-/epics/2",
"relation_url": "http://localhost/groups/group16/-/epics/1/links/24"
}
```
## Re-order a child epic
```plaintext
PUT /groups/:id/epics/:epic_iid/epics/:child_epic_id
```
| Attribute | Type | Required | Description |
| ---------------- | -------------- | -------- | ------------------------------------------------------------------------------------------------------------------ |
| `id` | integer/string | yes | The ID or [URL-encoded path of the group](index.md#namespaced-path-encoding) owned by the authenticated user. |
| `epic_iid` | integer | yes | The internal ID of the epic. |
| `child_epic_id` | integer | yes | The global ID of the child epic. Internal ID can't be used because they can conflict with epics from other groups. |
| `move_before_id` | integer | no | The global ID of a sibling epic that should be placed before the child epic. |
| `move_after_id` | integer | no | The global ID of a sibling epic that should be placed after the child epic. |
```shell
curl --request PUT --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/groups/1/epics/4/epics/5"
```
Example response:
```json
[
{
"id": 29,
"iid": 6,
"group_id": 1,
"parent_id": 5,
"title": "Accusamus iste et ullam ratione voluptatem omnis debitis dolor est.",
"description": "Molestias dolorem eos vitae expedita impedit necessitatibus quo voluptatum.",
"author": {
"id": 10,
"name": "Lu Mayer",
"username": "kam",
"state": "active",
"avatar_url": "http://www.gravatar.com/avatar/018729e129a6f31c80a6327a30196823?s=80&d=identicon",
"web_url": "http://localhost:3001/kam"
},
"start_date": null,
"start_date_is_fixed": false,
"start_date_fixed": null,
"start_date_from_milestones": null, //deprecated in favor of start_date_from_inherited_source
"start_date_from_inherited_source": null,
"end_date": "2018-07-31", //deprecated in favor of due_date
"due_date": "2018-07-31",
"due_date_is_fixed": false,
"due_date_fixed": null,
"due_date_from_milestones": "2018-07-31", //deprecated in favor of start_date_from_inherited_source
"due_date_from_inherited_source": "2018-07-31",
"created_at": "2018-07-17T13:36:22.770Z",
"updated_at": "2018-07-18T12:22:05.239Z",
"labels": []
}
]
```
## Unassign a child epic
Unassigns a child epic from a parent epic.
```plaintext
DELETE /groups/:id/epics/:epic_iid/epics/:child_epic_id
```
| Attribute | Type | Required | Description |
| --------------- | -------------- | -------- | ------------------------------------------------------------------------------------------------------------------ |
| `id` | integer/string | yes | The ID or [URL-encoded path of the group](index.md#namespaced-path-encoding) owned by the authenticated user. |
| `epic_iid` | integer | yes | The internal ID of the epic. |
| `child_epic_id` | integer | yes | The global ID of the child epic. Internal ID can't be used because they can conflict with epics from other groups. |
```shell
curl --request DELETE --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/groups/1/epics/4/epics/5"
```
Example response:
```json
{
"id": 5,
"iid": 38,
"group_id": 1,
"parent_id": null,
"title": "Accusamus iste et ullam ratione voluptatem omnis debitis dolor est.",
"description": "Molestias dolorem eos vitae expedita impedit necessitatibus quo voluptatum.",
"author": {
"id": 10,
"name": "Lu Mayer",
"username": "kam",
"state": "active",
"avatar_url": "http://www.gravatar.com/avatar/018729e129a6f31c80a6327a30196823?s=80&d=identicon",
"web_url": "http://localhost:3001/kam"
},
"start_date": null,
"start_date_is_fixed": false,
"start_date_fixed": null,
"start_date_from_milestones": null, //deprecated in favor of start_date_from_inherited_source
"start_date_from_inherited_source": null,
"end_date": "2018-07-31", //deprecated in favor of due_date
"due_date": "2018-07-31",
"due_date_is_fixed": false,
"due_date_fixed": null,
"due_date_from_milestones": "2018-07-31", //deprecated in favor of start_date_from_inherited_source
"due_date_from_inherited_source": "2018-07-31",
"created_at": "2018-07-17T13:36:22.770Z",
"updated_at": "2018-07-18T12:22:05.239Z",
"labels": []
}
```