openapi: 3.2.0
info:
  title: Sinch SMS Inbounds API
  description: The Sinch SMS API enables developers to send and receive SMS messages globally at scale. It supports batch messaging with scheduled delivery, message templates, delivery reports, and inbound message handling via webhooks. The API provides group management for organizing recipients, automatic message encoding optimization, and supports both transactional and marketing use cases across carriers worldwide.
  version: '1.0'
  contact:
    name: Sinch Support
    url: https://www.sinch.com/contact-us/
  termsOfService: https://www.sinch.com/terms-of-service/
servers:
- url: https://us.sms.api.sinch.com
  description: US Production Server
- url: https://eu.sms.api.sinch.com
  description: EU Production Server
- url: https://au.sms.api.sinch.com
  description: Australia Production Server
- url: https://br.sms.api.sinch.com
  description: Brazil Production Server
- url: https://ca.sms.api.sinch.com
  description: Canada Production Server
security:
- bearerAuth: []
tags:
- name: Inbounds
  description: Inbound messages (Mobile Originated) are incoming messages sent to your short codes or long numbers from mobile phones.
paths:
  /xms/v1/{service_plan_id}/inbounds:
    get:
      operationId: listInboundMessages
      summary: List Inbound Messages
      description: Returns a list of inbound (Mobile Originated) messages with pagination support. Messages can be filtered by start date and end date.
      tags:
      - Inbounds
      parameters:
      - $ref: '#/components/parameters/ServicePlanId'
      - name: page
        in: query
        description: The page number to retrieve
        schema:
          type: integer
          default: 0
      - name: page_size
        in: query
        description: The number of messages per page
        schema:
          type: integer
          default: 30
          maximum: 100
      - name: to
        in: query
        description: Filter by destination number
        schema:
          type: string
      - name: start_date
        in: query
        description: Filter messages received after this date
        schema:
          type: string
          format: date-time
      - name: end_date
        in: query
        description: Filter messages received before this date
        schema:
          type: string
          format: date-time
      responses:
        '200':
          description: List of inbound messages
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/InboundMessageList'
        '401':
          description: Unauthorized
  /xms/v1/{service_plan_id}/inbounds/{inbound_id}:
    get:
      operationId: getInboundMessage
      summary: Get an Inbound Message
      description: Returns the details of a specific inbound message.
      tags:
      - Inbounds
      parameters:
      - $ref: '#/components/parameters/ServicePlanId'
      - name: inbound_id
        in: path
        required: true
        description: The unique identifier of the inbound message
        schema:
          type: string
      responses:
        '200':
          description: Inbound message details
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/InboundMessage'
        '401':
          description: Unauthorized
        '404':
          description: Message not found
components:
  parameters:
    ServicePlanId:
      name: service_plan_id
      in: path
      required: true
      description: The unique identifier for the service plan
      schema:
        type: string
  schemas:
    InboundMessageList:
      type: object
      properties:
        count:
          type: integer
          description: Total number of inbound messages
        page:
          type: integer
          description: Current page number
        page_size:
          type: integer
          description: Number of messages per page
        inbounds:
          type: array
          description: List of inbound message objects
          items:
            $ref: '#/components/schemas/InboundMessage'
    InboundMessage:
      type: object
      properties:
        id:
          type: string
          description: The unique inbound message identifier
        from:
          type: string
          description: The sender phone number
        to:
          type: string
          description: The destination number
        body:
          type: string
          description: The message body
        type:
          type: string
          description: The message type
        received_at:
          type: string
          format: date-time
          description: When the message was received
        operator_id:
          type: string
          description: The mobile operator identifier
        client_reference:
          type: string
          description: Client reference from the original batch
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: API token sent in the Authorization header preceded by Bearer.
externalDocs:
  description: Sinch SMS API Documentation
  url: https://developers.sinch.com/docs/sms
x-ae-provenance: origin unrecorded (catalog pass before 2026-09); NOT a provider-published document. Kept on 2026-10-08 because its /xms/v1/{service_plan_id}/... paths match the SMS REST API reference nav at https://developers.sinch.com/docs/sms/api-reference (Batches, Delivery reports, Groups, Inbounds), which publishes no downloadable OpenAPI bundle (searched 2026-10-08). Moved out of _original/ because _original asserts provider publication.