## Update group

`client.groups.update(stringgroupID, GroupUpdateParamsbody?, RequestOptionsoptions?): GroupResponse`

**patch** `/v1/groups/{group_id}`

Partially updates a group's name or external reference ID. Returns 404 if the group does not belong to the authenticated organization.

### Parameters

- `groupID: string`

  Unique group identifier (grp_*)

- `body: GroupUpdateParams`

  - `external_reference_id?: string | null`

  - `name?: string | null`

### Returns

- `GroupResponse`

  Response containing a single group resource.

  - `data: Group`

    - `id: string`

      Prefixed group identifier (`grp_<base64-encoded-uuid>`).

    - `created_at: string | null`

      Group creation timestamp (ISO 8601, UTC).

    - `external_reference_id: string`

      Stable identifier for this group in the integrator's own system.

    - `name: string`

      Human-readable group name.

    - `organization_id: string`

      Prefixed organization identifier (`org_<base64-encoded-uuid>`).

    - `updated_at: string | null`

      Last-update timestamp (ISO 8601, UTC).

### Example

```typescript
import VitableConnect from '@vitable-inc/vitable-connect';

const client = new VitableConnect({
  apiKey: process.env['VITABLE_CONNECT_API_KEY'], // This is the default and can be omitted
});

const groupResponse = await client.groups.update('grp_abc123def456', {
  external_reference_id: 'mol_seg_001_v2',
  name: 'Tier 1 (renamed)',
});

console.log(groupResponse.data);
```

#### Response

```json
{
  "data": {
    "id": "grp_abc123def456",
    "organization_id": "org_abc123def456",
    "name": "Tier 1 (renamed)",
    "external_reference_id": "mol_seg_001_v2",
    "created_at": "2026-01-15T10:30:00Z",
    "updated_at": "2026-01-16T09:12:00Z"
  }
}
```