Repositories

Create a branch

Make a branch at another branch, a tag or a commit (from; the default branch when left out).

POST/repos/{owner}/{name}/branches

Needs the Write role or higher, and the repository’s rules for creating the branch hold. The name may not be taken, and may not be a folder of another branch’s name or hold one (feature cannot sit beside feature/login). To restore a deleted branch, make it again at the commit delete_branch answered with. Returns the new branch and the commit it points to.

The new branch and the commit it points to. from is a branch, a tag or a commit, the default branch when left out; to restore a deleted branch, send the hash that deleting it answered with. Refused with 404 when from names nothing, 409 when the name is taken or is a folder of another branch’s name (or holds one), 422 when it is not a valid branch name, and 403 without the Write role or when the repository’s rules refuse it. See Branches.

Authentication: Required. Send an access token as Authorization: Bearer.
MCP tool: repository with action create_branch, and the same inputs
Scope: An access token needs repo:write.

Path parameters

Name	Type	Required	Description
`owner`	string	Yes	The workspace that owns the repository.
`name`	string	Yes	The repository’s name.

Body parameters

Send a JSON object. Names are snake_case, as in responses; the camelCase spelling is accepted too.

Name	Type	Required	Description
`name`	string	Yes	The new branch’s name, e.g. “feature/login”.
`from`	string	No	The branch, tag or commit to start it from. The default branch when left out.

Example request

curl -X POST https://api.g1t.sh/repos/flagon-io/hello/branches \
  -H "Authorization: Bearer $G1T_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "feature/login",
    "from": "main"
  }'

Example response

A successful request answers 200 with:

{
  "name": "feature/login",
  "hash": "9f2c4e1b7a3d5c6e8f0a1b2c3d4e5f6a7b8c9d0e"
}

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 an agent token outside its repository.
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.