openapi: 3.2.0
info:
  title: Blueprint Composer API
  version: 1A
  summary: API Blueprint parsing service
  description: The API Blueprint parsing service provides parsing of API Blueprint "as a service".
  license:
    name: MIT
    identifier: MIT
  contact:
    name: API Blueprint
    url: https://apiblueprint.org
servers:
- url: https://api.apiblueprint.org
  description: Production parsing service (declared as HOST in the provider's apiary.apib)
tags:
- name: Composer
  description: Compose an API description format from API Elements.
paths:
  /composer:
    post:
      tags:
      - Composer
      operationId: composeApiDescription
      summary: Compose
      description: Reverse the parsing process — compose an API description format from API Elements. Accepts an API Elements API Category or an API Elements Parse Result and returns an API Blueprint document.
      parameters:
      - name: Accept
        in: header
        required: false
        description: Desired output media type.
        schema:
          type: string
          enum:
          - text/vnd.apiblueprint
        example: text/vnd.apiblueprint
      requestBody:
        required: true
        description: API Elements document to compose from.
        content:
          application/vnd.refract+json:
            schema:
              $ref: '#/components/schemas/ApiElement'
          application/vnd.refract.parse-result+json:
            schema:
              $ref: '#/components/schemas/ParseResult'
      responses:
        '200':
          description: The composed API Blueprint document.
          content:
            text/vnd.apiblueprint:
              schema:
                type: string
        '415':
          description: Unsupported Content-Type, or an unsupported Refract serialisation version.
          content:
            application/vnd.error+json:
              schema:
                $ref: '#/components/schemas/Error'
              examples:
                unsupportedRefractVersion:
                  value:
                    message: 'Unsupported Refract Serialisation version `2.0`. Supported: 0.6, 1.0.'
                unsupportedContentType:
                  value:
                    message: 'Unsupported Content-Type `application/vnd.apiblueprint.ast+json`. Supported: application/vnd.refract+json, application/vnd.refract.parse-result+json. API Blueprint AST is no longer supported.'
components:
  schemas:
    ParseResult:
      allOf:
      - $ref: '#/components/schemas/ApiElement'
      description: 'A Refract Parse Result element (`element: parseResult`) whose content carries the parsed API category plus any annotations.'
    ApiElement:
      type: object
      description: A Refract / API Elements element. Structure is defined by the API Elements element schema, saved in this repository at json-schema/api-blueprint-api-elements-element-schema.json.
      properties:
        element:
          type: string
        meta:
          type: object
        attributes:
          type: object
        content: {}
      required:
      - element
    Error:
      type: object
      description: The vnd.error media type as used by this API. Carries a single human readable message.
      properties:
        message:
          type: string
      required:
      - message
externalDocs:
  description: API Blueprint API documentation on Apiary
  url: https://apiblueprintapi.docs.apiary.io/