curl -X PUT 'https://api.github.com/repos/example-owner/example-repo/pulls/10/update-branch' \
  -H "Authorization: Bearer $GITHUB_TOKEN" \
  -H 'Accept: application/vnd.github+json' \
  -H 'X-GitHub-Api-Version: 2026-03-10' \
  -H 'Content-Type: application/json' \
  -d '{}'

# PUT /repos/{owner}/{repo}/pulls/{pull_number}/update-branch (GitHub API)
Base URL: https://api.github.com
Auth: Authorization; GitHub token; required.
Request formats: application/json.
Last verified: 2026-10-20

> Update a pull request branch

## Critical Gotchas
* GitHub recommends an `Accept: application/vnd.github+json` header and an explicit `X-GitHub-Api-Version` header.
* Fine-grained tokens only authorize repositories and permissions selected when the token is created.

## cURL
curl -X PUT 'https://api.github.com/repos/example-owner/example-repo/pulls/10/update-branch' \
  -H "Authorization: Bearer $GITHUB_TOKEN" \
  -H 'Accept: application/vnd.github+json' \
  -H 'X-GitHub-Api-Version: 2026-03-10' \
  -H 'Content-Type: application/json' \
  -d '{}'

## Parameters
| Name | In | Type | Required | Description |
| :--- | :--- | :--- | :--- | :--- |
| owner | path | string | Yes | The account owner of the repository. The name is not case sensitive. |
| repo | path | string | Yes | The name of the repository without the `.git` extension. The name is not case... |
| pull_number | path | integer | Yes | The number that identifies the pull request. |
| expected_head_sha | body | string | No | The expected SHA of the pull request's HEAD ref. This is the most recent comm... |

## Response example
{"message":"string","url":"string"}

---
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PUT

PUT /repos/{owner}/{repo}/pulls/{pull_number}/update-branch — GitHub API

GitHub token (required); https://api.github.com

GitHub API

Update a pull request branch

Base URL: https://api.github.com
Auth: Authorization: Bearer <GITHUB_API_KEY>
Last verified: 2026-10-20 · upstream hash matched

Actions Try in browser→

Agents: curl -H "Accept: text/markdown" this URL
→ 267 tokens · Vary: Accept

Critical gotchas

GitHub recommends an Accept: application/vnd.github+json header and an explicit X-GitHub-Api-Version header.

Fine-grained tokens only authorize repositories and permissions selected when the token is created.

cURL

curl -X PUT 'https://api.github.com/repos/example-owner/example-repo/pulls/10/update-branch' \  -H "Authorization: Bearer $GITHUB_TOKEN" \  -H 'Accept: application/vnd.github+json' \  -H 'X-GitHub-Api-Version: 2026-03-10' \  -H 'Content-Type: application/json' \  -d '{}'

Parameters

Name	In	Type	Required	Description
owner	path	string	Yes	The account owner of the repository. The name is not case sensitive.
repo	path	string	Yes	The name of the repository without the `.git` extension. The name is not case sensitive.
pull_number	path	integer	Yes	The number that identifies the pull request.
expected_head_sha	body	string	No	The expected SHA of the pull request's HEAD ref. This is the most recent commit on the pull request's branch. If the expected SHA does not match the pull request's HEAD, you will receive a `422 Unprocessable Entity` status. You can use the "[List commits](https://docs.github.com/rest/commits/commits#list-commits)" endpoint to find the most recent commit SHA. Default: SHA of the pull request's current HEAD ref.

Response 200 OK

{
  "message": "string",
  "url": "string"
}

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