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---
stage: Plan
group: Project Management
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
---
# Issue links API **(FREE)**
> The simple "relates to" relationship [moved](https://gitlab.com/gitlab-org/gitlab/-/issues/212329) to GitLab Free in 13.4.
## List issue relations
Get a list of a given issue's [linked issues](../user/project/issues/related_issues.md),
sorted by the relationship creation datetime (ascending).
Issues are filtered according to the user authorizations.
```plaintext
GET /projects/:id/issues/:issue_iid/links
```
Parameters:
| Attribute | Type | Required | Description |
|-------------|---------|----------|--------------------------------------|
| `id` | integer/string | yes | The ID or [URL-encoded path of the project](index.md#namespaced-path-encoding) owned by the authenticated user |
| `issue_iid` | integer | yes | The internal ID of a project's issue |
```json
[
{
"id" : 84,
"iid" : 14,
"issue_link_id": 1,
"project_id" : 4,
"created_at" : "2016-01-07T12:44:33.959Z",
"title" : "Issues with auth",
"state" : "opened",
"assignees" : [],
"assignee" : null,
"labels" : [
"bug"
],
"author" : {
"name" : "Alexandra Bashirian",
"avatar_url" : null,
"state" : "active",
"web_url" : "https://gitlab.example.com/eileen.lowe",
"id" : 18,
"username" : "eileen.lowe"
},
"description" : null,
"updated_at" : "2016-01-07T12:44:33.959Z",
"milestone" : null,
"user_notes_count": 0,
"due_date": null,
"web_url": "http://example.com/example/example/issues/14",
"confidential": false,
"weight": null,
"link_type": "relates_to",
"link_created_at": "2016-01-07T12:44:33.959Z",
"link_updated_at": "2016-01-07T12:44:33.959Z"
}
]
```
## Get an issue link
> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/88228) in GitLab 15.1.
Gets details about an issue link.
```plaintext
GET /projects/:id/issues/:issue_iid/links/:issue_link_id
```
Supported attributes:
| Attribute | Type | Required | Description |
|-----------------|----------------|------------------------|-----------------------------------------------------------------------------|
| `id` | integer/string | **{check-circle}** Yes | ID or [URL-encoded path of the project](index.md#namespaced-path-encoding). |
| `issue_iid` | integer | **{check-circle}** Yes | Internal ID of a project's issue. |
| `issue_link_id` | integer/string | **{check-circle}** Yes | ID of an issue relationship. |
Response body attributes:
| Attribute | Type | Description |
|:---------------|:-------|:------------------------------------------------------------------------------------------|
| `source_issue` | object | Details of the source issue of the relationship. |
| `target_issue` | object | Details of the target issue of the relationship. |
| `link_type` | string | Type of the relationship. Possible values are `relates_to`, `blocks` and `is_blocked_by`. |
Example request:
```shell
curl --request GET --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/projects/84/issues/14/links/1"
```
Example response:
```json
{
"source_issue" : {
"id" : 83,
"iid" : 11,
"project_id" : 4,
"created_at" : "2016-01-07T12:44:33.959Z",
"title" : "Issues with auth",
"state" : "opened",
"assignees" : [],
"assignee" : null,
"labels" : [
"bug"
],
"author" : {
"name" : "Alexandra Bashirian",
"avatar_url" : null,
"state" : "active",
"web_url" : "https://gitlab.example.com/eileen.lowe",
"id" : 18,
"username" : "eileen.lowe"
},
"description" : null,
"updated_at" : "2016-01-07T12:44:33.959Z",
"milestone" : null,
"subscribed" : true,
"user_notes_count": 0,
"due_date": null,
"web_url": "http://example.com/example/example/issues/11",
"confidential": false,
"weight": null
},
"target_issue" : {
"id" : 84,
"iid" : 14,
"project_id" : 4,
"created_at" : "2016-01-07T12:44:33.959Z",
"title" : "Issues with auth",
"state" : "opened",
"assignees" : [],
"assignee" : null,
"labels" : [
"bug"
],
"author" : {
"name" : "Alexandra Bashirian",
"avatar_url" : null,
"state" : "active",
"web_url" : "https://gitlab.example.com/eileen.lowe",
"id" : 18,
"username" : "eileen.lowe"
},
"description" : null,
"updated_at" : "2016-01-07T12:44:33.959Z",
"milestone" : null,
"subscribed" : true,
"user_notes_count": 0,
"due_date": null,
"web_url": "http://example.com/example/example/issues/14",
"confidential": false,
"weight": null
},
"link_type": "relates_to"
}
```
## Create an issue link
Creates a two-way relation between two issues. The user must be allowed to
update both issues to succeed.
```plaintext
POST /projects/:id/issues/:issue_iid/links
```
| Attribute | Type | Required | Description |
|---------------------|----------------|----------|--------------------------------------|
| `id` | integer/string | yes | The ID or [URL-encoded path of the project](index.md#namespaced-path-encoding) owned by the authenticated user |
| `issue_iid` | integer | yes | The internal ID of a project's issue |
| `target_project_id` | integer/string | yes | The ID or [URL-encoded path of the project](index.md#namespaced-path-encoding) of a target project |
| `target_issue_iid` | integer/string | yes | The internal ID of a target project's issue |
| `link_type` | string | no | The type of the relation ("relates_to", "blocks", "is_blocked_by"), defaults to "relates_to"). |
```shell
curl --request POST --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/projects/4/issues/1/links?target_project_id=5&target_issue_iid=1"
```
Example response:
```json
{
"source_issue" : {
"id" : 83,
"iid" : 11,
"project_id" : 4,
"created_at" : "2016-01-07T12:44:33.959Z",
"title" : "Issues with auth",
"state" : "opened",
"assignees" : [],
"assignee" : null,
"labels" : [
"bug"
],
"author" : {
"name" : "Alexandra Bashirian",
"avatar_url" : null,
"state" : "active",
"web_url" : "https://gitlab.example.com/eileen.lowe",
"id" : 18,
"username" : "eileen.lowe"
},
"description" : null,
"updated_at" : "2016-01-07T12:44:33.959Z",
"milestone" : null,
"subscribed" : true,
"user_notes_count": 0,
"due_date": null,
"web_url": "http://example.com/example/example/issues/11",
"confidential": false,
"weight": null
},
"target_issue" : {
"id" : 84,
"iid" : 14,
"project_id" : 4,
"created_at" : "2016-01-07T12:44:33.959Z",
"title" : "Issues with auth",
"state" : "opened",
"assignees" : [],
"assignee" : null,
"labels" : [
"bug"
],
"author" : {
"name" : "Alexandra Bashirian",
"avatar_url" : null,
"state" : "active",
"web_url" : "https://gitlab.example.com/eileen.lowe",
"id" : 18,
"username" : "eileen.lowe"
},
"description" : null,
"updated_at" : "2016-01-07T12:44:33.959Z",
"milestone" : null,
"subscribed" : true,
"user_notes_count": 0,
"due_date": null,
"web_url": "http://example.com/example/example/issues/14",
"confidential": false,
"weight": null
},
"link_type": "relates_to"
}
```
## Delete an issue link
Deletes an issue link, thus removes the two-way relationship.
```plaintext
DELETE /projects/:id/issues/:issue_iid/links/:issue_link_id
```
| Attribute | Type | Required | Description |
|-------------|---------|----------|--------------------------------------|
| `id` | integer/string | yes | The ID or [URL-encoded path of the project](index.md#namespaced-path-encoding) owned by the authenticated user |
| `issue_iid` | integer | yes | The internal ID of a project's issue |
| `issue_link_id` | integer/string | yes | The ID of an issue relationship |
| `link_type` | string | no | The type of the relation (`relates_to`, `blocks`, `is_blocked_by`), defaults to `relates_to` |
```json
{
"source_issue" : {
"id" : 83,
"iid" : 11,
"project_id" : 4,
"created_at" : "2016-01-07T12:44:33.959Z",
"title" : "Issues with auth",
"state" : "opened",
"assignees" : [],
"assignee" : null,
"labels" : [
"bug"
],
"author" : {
"name" : "Alexandra Bashirian",
"avatar_url" : null,
"state" : "active",
"web_url" : "https://gitlab.example.com/eileen.lowe",
"id" : 18,
"username" : "eileen.lowe"
},
"description" : null,
"updated_at" : "2016-01-07T12:44:33.959Z",
"milestone" : null,
"subscribed" : true,
"user_notes_count": 0,
"due_date": null,
"web_url": "http://example.com/example/example/issues/11",
"confidential": false,
"weight": null
},
"target_issue" : {
"id" : 84,
"iid" : 14,
"project_id" : 4,
"created_at" : "2016-01-07T12:44:33.959Z",
"title" : "Issues with auth",
"state" : "opened",
"assignees" : [],
"assignee" : null,
"labels" : [
"bug"
],
"author" : {
"name" : "Alexandra Bashirian",
"avatar_url" : null,
"state" : "active",
"web_url" : "https://gitlab.example.com/eileen.lowe",
"id" : 18,
"username" : "eileen.lowe"
},
"description" : null,
"updated_at" : "2016-01-07T12:44:33.959Z",
"milestone" : null,
"subscribed" : true,
"user_notes_count": 0,
"due_date": null,
"web_url": "http://example.com/example/example/issues/14",
"confidential": false,
"weight": null
},
"link_type": "relates_to"
}
```
|
