Delete a pull request's branch

DELETE/repos/{owner}/{name}/pulls/{number}/head-branch

Needs the Write role (push access to the fork, for a fork’s branch). Refused while the pull request is open, for the default branch, for a branch an open pull request still uses, and where rules protect it. head_branch_deleted is then true, and restore_pull_request_head_branch makes it again at its head. Publishes pull.head_branch_deleted. Returns the pull request.

An open pull request answers 409: close or merge it first. head_branch_deleted is then true; restore it at head_commit.

• Authentication: Required. Send an access token as Authorization: Bearer.
• MCP tool: pull_request with action delete_branch, and the same inputs
• Scope: An access token needs pull_requests:write.

Path parameters

Name	Type	Required	Description
owner	string	Yes	The workspace that owns the repository.
name	string	Yes	The repository’s name.
number	integer	Yes	The number shown after the #. Issues and pull requests share one sequence.

Example request

curl -X DELETE https://api.g1t.sh/repos/flagon-io/hello/pulls/14/head-branch \
  -H "Authorization: Bearer $G1T_TOKEN"

Example response

A successful request answers 200 with:

{
  "id": "pr_01m43smh3vexsr5pmp60qwv0vs",
  "repo_id": "rep_01m3m5q6p0e2qaw6mmjahk0qrr",
  "number": 14,
  "issue": 12,
  "title": "Greeting should name the caller",
  "body": "Reads a name from the first argument. `hello ana` prints \"Hello, ana!\".",
  "agent": "claude-code",
  "runtime": "external",
  "status": "merged",
  "fork": null,
  "fork_repo_id": null,
  "branch": "greet-caller",
  "head_commit": "9f2c4e1a7b3d5f60812a4c6e8b0d2f4a6c8e0b13",
  "merge_base": "3a7e9c1b5d2f4a6c8e0b2d4f6a8c0e2b4d6f8a1c",
  "merged_by": "syntaqx",
  "merged_at": "2026-10-01T18:52:17.093Z",
  "superseded_by": null,
  "check_status": "passed",
  "files": [
    {
      "path": "src/main.rs",
      "additions": 6,
      "deletions": 2
    }
  ],
  "assignees": [],
  "reviewers": [
    "ana"
  ],
  "labels": [],
  "milestone": null,
  "base": "main",
  "author": {
    "id": "usr_01kkntcg1eeb98j62xjm7eh09p",
    "username": "syntaqx",
    "display_username": "syntaqx",
    "kind": "user",
    "verified": false,
    "workspaces": []
  },
  "requested_by": null,
  "created_at": "2026-10-01T18:20:02.117Z",
  "updated_at": "2026-10-01T18:53:02.415Z",
  "merge_method": "squash",
  "merge_commit": "c41d7e2a9b0f3e5d7c9a1b3d5f7e9c0a2b4d6f81",
  "closes": [
    12
  ],
  "head_branch_deleted": true
}

Errors

A failed request answers with one of these statuses and a body like {"error": {"code": "not_found", "message": "Repository not found."}}. See errors.

Status	Code	When
401	unauthenticated	A token is required, or the one sent is not valid.
403	forbidden	The token is valid but not allowed to do this, such as a member-only change, or a token without the scope it needs.
404	not_found	It does not exist, or you cannot see it.
409	conflict	The request conflicts with the current state.
422	invalid	The input is not valid. message says which field and why.