# Update a membership

`PATCH /v1/organizations/{org_id}/memberships/{membership_id}` · permission `organizations:write`

Changes the membership's `role_ids` (the full set of manually assigned roles) or `expires_at` with a JSON merge patch (`Content-Type: application/merge-patch+json`). Both fields may change in the same request; they are applied in a single transaction, so either both are written or neither is, and one `organization_membership.updated` audit record is written. `expires_at` must be in the future and at most 365 days after the membership was created; `null` removes the end date. `role_ids: null` has no effect. Role rules are those of `PUT …/roles`. A field equal to its current value is not written. The write is audited as `organization_membership.updated`.

## Request

| Field | Type | Required | Description |
|---|---|---|---|
| `org_id` | path | yes | Organization ID (`org_…`). |
| `membership_id` | path | yes | Membership ID (`mem_…`). |
| `If-Match` | header | no | Current `ETag`; if given it must match (`412`) and pins the write to that version. |
| `role_ids` | string[] | no | Full set of manually assigned role IDs (`rol_…`), at most 50. |
| `expires_at` | string \| null | no | End of the membership (RFC 3339); `null` removes it. |

## Response

`200 OK` with the updated membership and its `ETag`.

```json
{
  "id": "mem_01j9xn5p9s0t4v6w8x0y2z4a6c",
  "organization_id": "org_01j9xk3m7q8r2s4t6v8w0y2z4a",
  "user_id": "usr_01j9xh2k6p7q1r3s5t7v9w1x3y",
  "status": "active",
  "source": "admin_api",
  "reason": null,
  "roles": [
    {
      "role_id": "rol_01j9xr7s1t2w6x8y0z2a4b6c8e",
      "source": "admin_api",
      "assigned_at": "2026-10-12T09:31:00.123456Z"
    }
  ],
  "expires_at": "2027-01-01T00:00:00Z",
  "created_at": "2026-10-12T09:31:00.123456Z",
  "activated_at": "2026-10-12T09:31:00.123456Z",
  "suspended_at": null,
  "removed_at": null,
  "updated_at": "2026-10-12T10:00:00Z",
  "version": 2
}
```

## Errors

| HTTP | code | When |
|---|---|---|
| 404 | `not_found` | The membership does not exist in this organization. |
| 403 | `role_not_assignable` | A role is not an environment role or a role of this organization. |
| 409 | `last_org_admin` | The change would leave the organization without an active admin. |
| 412 | `precondition_failed` | `If-Match` does not match the current version. |
| 415 | `unsupported_media_type` | The body is not `application/merge-patch+json`. |
| 422 | `validation_failed` | `expires_at` is out of range or the membership is removed (`invalid_state`), or a value is invalid. |
| 401 | `unauthenticated` | The credential is missing, invalid or revoked. |
| 403 | `insufficient_permissions` | The credential lacks the required permission. Assigning a privileged (`is_privileged`) role also requires `roles:write`; without it nothing is written and `required_permissions` lists both permissions. |
| 429 | `rate_limited` | The rate limit was exceeded; retry after the `Retry-After` period. |
| 503 | `service_unavailable` | A dependency is temporarily unavailable; retry after the `Retry-After` period. |

## Example

```bash
curl -i -X PATCH "https://api.eu.keenauth.com/v1/organizations/org_01j9xk3m7q8r2s4t6v8w0y2z4a/memberships/mem_01j9xn5p9s0t4v6w8x0y2z4a6c" \
  -H "Authorization: Bearer $KEENAUTH_SECRET_KEY" \
  -H "Content-Type: application/merge-patch+json" \
  -d '{"expires_at":"2027-01-01T00:00:00Z"}'
```

## Personal data

This endpoint carries personal data: organization memberships and invitations. [Personal data in the KeenAuth APIs](/docs/policies/personal-data) describes what is stored, how long it is kept and how it is deleted. Do not send special categories of personal data (health, biometric data, religion, political opinions, sexual orientation) in any field.