## GetMembership

**post** `/gitpod.v1.GroupService/GetMembership`

Gets a specific membership by group ID and subject.

Use this method to:

- Check if a user or service account is a member of a group
- Verify group membership for access control

### Examples

- Check user membership:

  Checks if a user is a member of a specific group.

  ```yaml
  groupId: "d2c94c27-3b76-4a42-b88c-95a85e392c68"
  subject:
    id: "f53d2330-3795-4c5d-a1f3-453121af9c60"
    principal: PRINCIPAL_USER
  ```

### Authorization

All organization members can check group membership (transparency model).

### Body Parameters

- `subject: Subject`

  Subject to check membership for

  - `id: optional string`

    id is the UUID of the subject

  - `principal: optional Principal`

    Principal is the principal of the subject

    - `"PRINCIPAL_UNSPECIFIED"`

    - `"PRINCIPAL_ACCOUNT"`

    - `"PRINCIPAL_USER"`

    - `"PRINCIPAL_RUNNER"`

    - `"PRINCIPAL_ENVIRONMENT"`

    - `"PRINCIPAL_SERVICE_ACCOUNT"`

    - `"PRINCIPAL_RUNNER_MANAGER"`

- `groupId: optional string`

### Returns

- `member: optional GroupMembership`

  The membership if found, nil if subject is not a member

  - `id: optional string`

    Unique identifier for the group membership

  - `avatarUrl: optional string`

    Subject's avatar URL

  - `groupId: optional string`

    Group identifier

  - `name: optional string`

    Subject's display name

  - `subject: optional Subject`

    Subject (user, runner, environment, service account, etc.)

    - `id: optional string`

      id is the UUID of the subject

    - `principal: optional Principal`

      Principal is the principal of the subject

      - `"PRINCIPAL_UNSPECIFIED"`

      - `"PRINCIPAL_ACCOUNT"`

      - `"PRINCIPAL_USER"`

      - `"PRINCIPAL_RUNNER"`

      - `"PRINCIPAL_ENVIRONMENT"`

      - `"PRINCIPAL_SERVICE_ACCOUNT"`

      - `"PRINCIPAL_RUNNER_MANAGER"`

### Example

```http
curl https://app.gitpod.io/api/gitpod.v1.GroupService/GetMembership \
    -H 'Content-Type: application/json' \
    -H "Authorization: Bearer $GITPOD_API_KEY" \
    -d '{
          "subject": {
            "id": "f53d2330-3795-4c5d-a1f3-453121af9c60",
            "principal": "PRINCIPAL_USER"
          }
        }'
```

#### Response

```json
{
  "member": {
    "id": "182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e",
    "avatarUrl": "avatarUrl",
    "groupId": "182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e",
    "name": "name",
    "subject": {
      "id": "182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e",
      "principal": "PRINCIPAL_UNSPECIFIED"
    }
  }
}
```