Circle Headless - Auth API

openapi: 3.0.3
info:
  title: Circle Developer Platform Admin - Courses Headless - Auth API
  description: 'Circle (circle.so) is an all-in-one community platform for creators, coaches, and brands. This description grounds Circle''s documented public developer platform into a single OpenAPI file for discovery. It covers two admin- or member-authenticated REST surfaces: the Admin API V2 (base https://app.circle.so/api/admin/v2) for community administration and automation, and the Headless Member API (base https://app.circle.so/api/headless/v1) for building your own member-facing experience, plus the Headless Auth API token exchange. Admin API requests use an "Authorization: Token AUTH_TOKEN" header; Headless Member API requests use a member-scoped JWT in an "Authorization: Bearer ACCESS_TOKEN" header issued by the Auth API. API access is gated to the Business plan and above. This is the community-software company at circle.so, NOT the USDC / stablecoin financial-services company. Paths shown are a representative, grounded subset of the full reference published at api-headless.circle.so.'
  version: '2.0'
  contact:
    name: Circle
    url: https://circle.so
  license:
    name: Proprietary
    url: https://circle.so/terms
servers:
- url: https://app.circle.so
  description: Circle production
security:
- tokenAuth: []
tags:
- name: Headless - Auth
  description: Member JWT token exchange for the Headless Member API.
paths:
  /api/v1/headless/auth_token:
    post:
      tags:
      - Headless - Auth
      summary: Exchange a headless auth token for a member JWT
      description: Server-to-server exchange of a community-level headless auth token for a member-scoped JWT access token plus refresh token. Access tokens expire after one hour.
      security:
      - bearerAuth: []
      responses:
        '200':
          description: The issued access and refresh tokens.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HeadlessAuthToken'
components:
  schemas:
    HeadlessAuthToken:
      type: object
      properties:
        access_token:
          type: string
        refresh_token:
          type: string
        access_token_expires_at:
          type: string
        refresh_token_expires_at:
          type: string
        community_member_id:
          type: integer
        community_id:
          type: integer
  securitySchemes:
    tokenAuth:
      type: apiKey
      in: header
      name: Authorization
      description: Admin API token in the format "Token AUTH_TOKEN". Community admins generate the token on the Developers -> Tokens page.
    bearerAuth:
      type: http
      scheme: bearer
      description: Member-scoped JWT access token from /api/v1/headless/auth_token in the format "Bearer ACCESS_TOKEN". Expires after one hour.