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OpenAPI Specification

openapi: 3.2.0
info:
  title: Sandwich Public Newsletter API
  version: 1.0.0
  summary: Public care-directory MCP, markdown negotiation, and discovery for joinsandwich.com.
  description: Machine-readable API for the Sandwich marketing and directory site (www.joinsandwich.com). The public MCP is read-only and requires no auth. Private Care Circle tools and OAuth 2.0 live on inbox.lovedone.app (see /.well-known/oauth-authorization-server).
  contact:
    name: Sandwich
    email: hello@joinsandwich.com
    url: https://www.joinsandwich.com/agents
  license:
    name: Proprietary
    url: https://www.joinsandwich.com/terms
servers:
- url: https://www.joinsandwich.com
  description: Production (canonical www host)
- url: https://joinsandwich.com
  description: Apex host (redirects to www)
tags:
- name: Newsletter
  description: Public newsletter signup.
paths:
  /api/newsletter:
    post:
      tags:
      - Newsletter
      operationId: subscribeNewsletter
      summary: Subscribe an email to the Sandwich newsletter
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - email
              properties:
                email:
                  type: string
                  format: email
                firstName:
                  type: string
                recaptchaToken:
                  type: string
      responses:
        '200':
          description: Subscription accepted
          content:
            application/json:
              schema:
                type: object
                properties:
                  success:
                    type: boolean
                  message:
                    type: string
        '400':
          $ref: '#/components/responses/ApiError'
        '405':
          $ref: '#/components/responses/ApiError'
        '429':
          $ref: '#/components/responses/ApiError'
        '500':
          $ref: '#/components/responses/ApiError'
components:
  responses:
    ApiError:
      description: Structured JSON error with code, message, and resolution hint
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ApiError'
  schemas:
    ApiError:
      type: object
      required:
      - error
      - code
      - message
      - hint
      properties:
        error:
          type: object
          required:
          - code
          - message
          - hint
          properties:
            code:
              type: string
              example: NOT_FOUND
            message:
              type: string
            hint:
              type: string
        code:
          type: string
          example: NOT_FOUND
        message:
          type: string
        hint:
          type: string
  securitySchemes:
    firebaseBearer:
      type: http
      scheme: bearer
      bearerFormat: Firebase ID token
      description: Firebase ID token from a signed-in Sandwich user.