Update an Origin Pull Request Thread via the API

Resolve or reopen a comment thread with PATCH https://api.cursor.com/v1/origin/repos/{ownerSlug}/{repoName}/pulls/threads/{threadId}. Official reference: Origin API → Update Pull Request Thread (OpenAPI OriginService_UpdatePullRequestThread). Changelog notes: August 29, 2026 (endpoint added; idempotent resolve/reopen), September 16, 2026 (OpenAPI schema renamed Thread → CommentThread; wire JSON unchanged).

Origin is in Early Beta and subject to change. Authenticate with an installation access token (oit_…) or a user access token that carries repository:pull_requests:reviews:write. Availability: Early Beta per the API overview.

Resolving an already-resolved thread, or reopening an already-open one, is a no-op. The thread must belong to the repository in the path; a thread stored on another repository returns 404. A 404 never distinguishes a missing thread from one your installation cannot reach. Replying to a resolved thread with Create Pull Request Comment is allowed and does not reopen it.

Cost: 5 points against the principal budget (ordinary write).

Path parameters

Param	Required	Meaning
ownerSlug	yes	Owning entity's unique slug
repoName	yes	Repo name, unique to the owner
threadId	yes	Stable Origin thread id (e.g. cth_…)

Request body

Field	Required	Meaning
resolved	yes	Target resolution state. true resolves the thread; false reopens it

curl --request PATCH \
  --url 'https://api.cursor.com/v1/origin/repos/OWNER_SLUG/REPO_NAME/pulls/threads/cth_01k2ja2000e0080000000000s6' \
  --header 'Authorization: Bearer YOUR_ORIGIN_TOKEN' \
  --header 'Content-Type: application/json' \
  --data '{
  "resolved": true
}'

Reopen:

curl --request PATCH \
  --url 'https://api.cursor.com/v1/origin/repos/OWNER_SLUG/REPO_NAME/pulls/threads/cth_01k2ja2000e0080000000000s6' \
  --header 'Authorization: Bearer YOUR_ORIGIN_TOKEN' \
  --header 'Content-Type: application/json' \
  --data '{
  "resolved": false
}'

Response

200 returns a CommentThread: id, filed-against version, diff anchor (path, side, startLine, endLine), resolvedAt, createdAt, updatedAt.

{
  "id": "cth_01k2ja2000e0080000000000s6",
  "version": {
    "number": "3",
    "headSha": "9a41f0c3d2b8e7f6a5c4d3e2f1b0a9c8d7e6f5a4",
    "baseSha": "3b1f9c2d8a7e6f5049c8b7a6d5e4f3a2b1c0d9e8",
    "createdAt": "2026-08-01T09:30:00Z"
  },
  "path": "src/telemetry/retry.ts",
  "side": "right",
  "startLine": 42,
  "endLine": 45,
  "resolvedAt": "2026-08-03T10:00:00Z",
  "createdAt": "2026-08-01T09:30:00Z",
  "updatedAt": "2026-08-03T10:00:00Z"
}

path is empty on general-discussion threads; resolvedAt is unset while the thread is open; startLine / endLine are 0 for file-level and general-discussion threads. List or Get Pull Request Comments to read comments inside the thread.

Base URL: https://api.cursor.com/v1/origin.