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OpenAPI Specification

openapi: 3.2.0
info:
  title: General Translation Branches API
  version: 2026-03-06.v1
  description: The public General Translation API.
  contact:
    name: General Translation Support
    email: support@generaltranslation.com
    url: https://generaltranslation.com
servers:
- url: https://api2.gtx.dev
  description: Project and file API
- url: https://runtime2.gtx.dev
  description: Runtime translation API (POST /v2/translate)
security:
- Bearer: []
tags:
- name: Branches
  description: Read and create project branches.
paths:
  /v2/project/branches/info:
    post:
      tags:
      - Branches
      summary: Get branch information
      operationId: getBranchInfo
      parameters:
      - $ref: '#/components/parameters/GtApiVersion'
      - $ref: '#/components/parameters/GtProjectId'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                branchNames:
                  type: array
                  default: []
                  items:
                    type: string
      responses:
        '200':
          description: Branch information.
          content:
            application/json:
              schema:
                type: object
                properties:
                  branches:
                    type: array
                    items:
                      $ref: '#/components/schemas/Branch'
                  defaultBranch:
                    type:
                    - object
                    - 'null'
                    properties:
                      id:
                        type: string
                      name:
                        type: string
                    description: The default branch, or null if none is set.
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          $ref: '#/components/responses/Forbidden'
  /v2/project/branches/create:
    post:
      tags:
      - Branches
      summary: Create a branch
      description: Create a new branch, or rename and confirm the default branch.
      operationId: createBranch
      parameters:
      - $ref: '#/components/parameters/GtApiVersion'
      - $ref: '#/components/parameters/GtProjectId'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - branchName
              properties:
                branchName:
                  type: string
                  minLength: 1
                defaultBranch:
                  type: boolean
                  default: false
      responses:
        '200':
          description: Created branch.
          content:
            application/json:
              schema:
                type: object
                properties:
                  branch:
                    $ref: '#/components/schemas/Branch'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          description: Forbidden. Free plans cannot create non-default branches.
          content:
            text/plain:
              schema:
                type: string
components:
  responses:
    Forbidden:
      description: The API key lacks the required permission, or the action is not allowed on the current plan.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    Unauthorized:
      description: Missing or invalid API key.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    BadRequest:
      description: The request was invalid.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  parameters:
    GtProjectId:
      name: gt-project-id
      in: header
      required: false
      description: Target project ID. Required when authenticating with an organization API key.
      schema:
        type: string
    GtApiVersion:
      name: gt-api-version
      in: header
      required: false
      description: 'API version. Defaults to the earliest supported version. Latest is `2026-03-06.v1`.

        '
      schema:
        type: string
        enum:
        - 2025-01-01.v0
        - 2025-11-03.v1
        - 2026-02-18.v1
        - 2026-03-06.v1
  schemas:
    Branch:
      type: object
      properties:
        id:
          type: string
        name:
          type: string
    Error:
      type: object
      properties:
        error:
          type: string
          description: Human-readable error message.
  securitySchemes:
    Bearer:
      type: http
      scheme: bearer
      description: 'API key sent as a bearer token in the standard `Authorization: Bearer <key>` header. Use a project key (`gtx-api-`, `gtx-dev-`) or an organization key (`gtx-org-`). Organization keys must also send `gt-project-id` on project-scoped routes.

        '