Protected branches are available in public repositories with GitHub Free and GitHub Free for organizations, and in public and private repositories with GitHub Pro, GitHub Team, GitHub Enterprise Cloud, and GitHub Enterprise Server. For more information, see GitHub's products in the GitHub Help documentation.
Note: Protected Branches API can now manage a setting for requiring signed commits. This feature is currently available for developers to preview. See the blog post for full details. To access the API during the preview period, you must provide a custom media type in the Accept header:
application/vnd.github.zzzax-preview+json
Warning: The API may change without advance notice during the preview period. Preview features are not supported for production use. If you experience any issues, contact GitHub Support or GitHub Premium Support.
When authenticated with admin or owner permissions to the repository, you can use this endpoint to check whether a branch requires signed commits. An enabled status of true indicates you must sign commits on this branch. For more information, see Signing commits with GPG in GitHub Help.
Note: You must enable branch protection to require signed commits.
GET /repos/:owner/:repo/branches/:branch/protection/required_signatures
Status: 200 OK
{
"url": "https://api.github.com/repos/octocat/Hello-World/branches/master/protection/required_signatures",
"enabled": true
}