Create an engagement thread

Gateway module

POST/engagement-threadsengagementThreads.create

A message thread inside an engagement. Creates an engagement thread. Requires `Idempotency-Key`; a replay returns the original response. The organization is derived from the credential or the parent row, never from the body.

Requires the capability opportunities.engagement.write.
OAuth scopes: opportunities.
Send an Idempotency-Key header. A replay with the same key returns the original response.
Error statuses: 400, 401, 409, 422, 429. Errors are RFC 9457 problem details.

Request body: EngagementThreadCreate

engagementThreads.create: EngagementThreadCreate
Field	Type	Required	Description
engagement_id	string (uuid)	Yes	Identifier of the engagement.
subject	string	Yes	Thread subject.Constraints: length 1 to 300

{
  "engagement_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
  "subject": "Parking for Load-In"
}

Response 201: EngagementThread

engagementThreads.create: EngagementThread
Field	Type	Required	Description
id	string (uuid)	Yes	Identifier of the engagement thread.
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)	Yes	Identifier of the engagement.
subject	string	Yes	Thread subject.Constraints: length 1 to 300

{
  "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",
  "subject": "Parking for Load-In"
}

Code samples

curl -X POST "$XOS_BASE_URL/engagement-threads" \
  -H "Authorization: Bearer $XOS_API_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Content-Type: application/json" \
  -d '{"engagement_id":"0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f","subject":"Parking for Load-In"}'

const { data } = await xos.engagementThreads.create({
    "engagement_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f",
    "subject": "Parking for Load-In"
  });

response = xos.engagement_threads.create({"engagement_id": "0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f", "subject": "Parking for Load-In"})

xos engagement-threads create --data '{"engagement_id":"0192f1e2-7c3a-7b4d-9e8f-1a2b3c4d5e6f","subject":"Parking for Load-In"}'