Update a per diem
Crew module
PATCH/per-diems/{id}perDiems.update
A per diem allowance for an engagement. Updates the fields sent; omitted fields are unchanged. Requires `If-Match` with the current `ETag`: a stale tag returns 412 and a missing tag returns 428.
- Requires the capability crew.rate_card.write.
- OAuth scopes: crew.
- Send If-Match with the ETag you read. A stale tag returns 412; a missing tag returns 428.
- Error statuses: 400, 401, 404, 412, 422, 428, 429. Errors are RFC 9457 problem details.
Path and query parameters
| Field | Type | Required | Description |
|---|---|---|---|
| id | string (uuid) | Yes | Identifier of the per diem. |
Request body: PerDiemUpdate
| Field | Type | Required | Description |
|---|---|---|---|
| engagement_id | string (uuid) | null | No | Identifier of the engagement. |
| project_id | string (uuid) | No | Identifier of the project worked. |
| membership_id | string (uuid) | null | No | Identifier of the membership of the person paid; null for external crew, who carry an engagement. |
| day | string (date) | No | Day the allowance covers. |
| amount_minor | integer (int64) | No | Allowance for the day. Integer minor units of the row's currency.Constraints: range 0 to any |
| currency_code | string | No | ISO 4217 currency.Constraints: pattern ^[A-Z]{3}$ |
{
"engagement_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"project_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"membership_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"day": "2026-10-08",
"amount_minor": 6500,
"currency_code": "USD"
}Response 200: PerDiem
| Field | Type | Required | Description |
|---|---|---|---|
| id | string (uuid) | Yes | Identifier of the per diem. |
| 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. |
| engagement_id | string (uuid) | null | Yes | Identifier of the engagement. |
| project_id | string (uuid) | Yes | Identifier of the project worked. |
| membership_id | string (uuid) | null | Yes | Identifier of the membership of the person paid; null for external crew, who carry an engagement. |
| day | string (date) | Yes | Day the allowance covers. |
| amount_minor | integer (int64) | null | Yes | Allowance for the day. Integer minor units of the resource currency; null means unpriced, never zero. |
| currency_code | string | Yes | ISO 4217 currency.Constraints: pattern ^[A-Z]{3}$ |
{
"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",
"engagement_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"project_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"membership_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"day": "2026-10-08",
"amount_minor": 6500,
"currency_code": "USD"
}Code samples
curl -X PATCH "$XOS_BASE_URL/per-diems/0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f" \
-H "Authorization: Bearer $XOS_API_KEY" \
-H 'If-Match: W/"etag-from-your-last-read"' \
-H "Content-Type: application/json" \
-d '{"engagement_id":"0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f","project_id":"0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f","membership_id":"0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f","day":"2026-10-08","amount_minor":6500,"currency_code":"USD"}'const { data, etag } = await xos.perDiems.update("0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f", {
"engagement_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"project_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"membership_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
"day": "2026-10-08",
"amount_minor": 6500,
"currency_code": "USD"
}, { ifMatch: etag });response = xos.per_diems.update("0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f", {"engagement_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f", "project_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f", "membership_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f", "day": "2026-10-08", "amount_minor": 6500, "currency_code": "USD"}, if_match=etag)xos per-diems update 0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f --data '{"engagement_id":"0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f","project_id":"0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f","membership_id":"0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f","day":"2026-10-08","amount_minor":6500,"currency_code":"USD"}' --if-match auto