Get a custom object relation
Platform module
GET/custom-object-relations/{id}customObjectRelations.get
A relation from a custom object record to another record. Returns one custom object relation with its `ETag`. A custom object relation the caller may not see returns 404.
- Requires the capability work.record.read.
- OAuth scopes: work.
- Error statuses: 400, 401, 404, 429. Errors are RFC 9457 problem details.
Path and query parameters
| Field | Type | Required | Description |
|---|---|---|---|
| id | string (uuid) | Yes | Identifier of the custom object relation. |
| fields | Fields | No | Sparse fieldset: a comma-separated list of top-level fields to return. `id` is always returned.Constraints: pattern ^[a-z_][a-z0-9_]*(,[a-z_][a-z0-9_]*)*$ |
Response 200: CustomObjectRelation
| Field | Type | Required | Description |
|---|---|---|---|
| id | string (uuid) | Yes | Identifier of the custom object relation. |
| org_id | string (uuid) | Yes | Identifier of the owning organization, derived from the parent row and never accepted from the caller. |
| created_at | string (date-time) | Yes | When the row was created. |
| created_by | string (uuid) | null | Yes | Identifier of the person who created the row; null when a seed, platform or system process created it. |
| updated_at | string (date-time) | Yes | When the row was last updated. |
| updated_by | string (uuid) | null | Yes | Identifier of the person who last updated the row; null when a seed, platform or system process updated it. |
| from_record_id | string (uuid) | Yes | Identifier of the custom object record the link starts from. |
| relation_key | string | Yes | Name of the relation, such as sponsor or venue.Constraints: pattern ^[A-Za-z0-9][A-Za-z0-9._-]{0,63}$ |
| to_custom_record_id | string (uuid) | null | Yes | Identifier of the linked custom object record. |
| to_record_id | string (uuid) | null | Yes | Identifier of the linked record. |
| to_project_id | string (uuid) | null | Yes | Identifier of the linked project. |
| to_counterparty_id | string (uuid) | null | Yes | Identifier of the linked counterparty organization. |
| to_person_id | string (uuid) | null | Yes | Identifier of the linked person. |
{
"id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"org_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"created_at": "2026-10-08T14:30:00Z",
"created_by": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"updated_at": "2026-10-08T14:30:00Z",
"updated_by": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"from_record_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"relation_key": "sponsor",
"to_custom_record_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"to_record_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"to_project_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"to_counterparty_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"to_person_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f"
}Code samples
curl -X GET "$XOS_BASE_URL/custom-object-relations/0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f" \
-H "Authorization: Bearer $XOS_API_KEY"const { data, etag } = await xos.customObjectRelations.get("0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f");response = xos.custom_object_relations.get("0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f")xos custom-object-relations get 0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f