openapi: 3.0.3
info:
  title: Courier Audiences Send API
  description: 'Courier is notification infrastructure that orchestrates transactional and product messaging across email, SMS, push, chat, and an in-app inbox from a single REST API. This document models the primary public endpoints under the base URL https://api.courier.com: sending notifications (Send), inspecting sent messages, managing lists, user profiles, preferences, device tokens, notification templates, brands, automations, audiences, tenants, bulk jobs, audit events, and translations. All requests are authenticated with a Bearer API key. Endpoint paths are grounded in Courier''s published API reference; request and response bodies are modeled and simplified.'
  version: 2024-01
  contact:
    name: Courier
    url: https://www.courier.com
  x-endpoint-confidence: Paths and methods are grounded in the Courier API reference (https://www.courier.com/docs/reference). Schemas are modeled, not exhaustive.
servers:
- url: https://api.courier.com
  description: Courier production API
security:
- bearerAuth: []
tags:
- name: Send
  description: Dispatch a notification across channels.
paths:
  /send:
    post:
      operationId: sendMessage
      tags:
      - Send
      summary: Send a message
      description: Dispatches a single notification to one or more recipients, routed across channels using a template or inline content, per-recipient routing, data, and overrides. Returns a requestId used to track the resulting messages.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/SendRequest'
      responses:
        '202':
          description: The send request was accepted for processing.
          content:
            application/json:
              schema:
                type: object
                properties:
                  requestId:
                    type: string
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
components:
  responses:
    BadRequest:
      description: The request was malformed or failed validation.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    Unauthorized:
      description: Missing or invalid API key.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  schemas:
    Error:
      type: object
      properties:
        message:
          type: string
        type:
          type: string
    Recipient:
      type: object
      properties:
        user_id:
          type: string
        email:
          type: string
        phone_number:
          type: string
        list_id:
          type: string
        audience_id:
          type: string
        tenant_id:
          type: string
        data:
          type: object
          additionalProperties: true
        preferences:
          type: object
          additionalProperties: true
    SendRequest:
      type: object
      required:
      - message
      properties:
        message:
          type: object
          description: The message to send.
          properties:
            to:
              description: One recipient object or an array of recipients.
              oneOf:
              - $ref: '#/components/schemas/Recipient'
              - type: array
                items:
                  $ref: '#/components/schemas/Recipient'
            template:
              type: string
              description: The notification template id to send.
            content:
              type: object
              description: Inline elemental content to send instead of a template.
              additionalProperties: true
            brand_id:
              type: string
            data:
              type: object
              additionalProperties: true
            routing:
              type: object
              properties:
                method:
                  type: string
                  enum:
                  - all
                  - single
                channels:
                  type: array
                  items:
                    type: string
            channels:
              type: object
              additionalProperties: true
            providers:
              type: object
              additionalProperties: true
            metadata:
              type: object
              additionalProperties: true
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: 'Courier API key passed as `Authorization: Bearer <YOUR_API_KEY>`. Keys are found in the Courier settings under API Keys and are environment scoped (test vs production).'