Kudosity RCS API

openapi: 3.2.0
info:
  title: Transmit Message RCS API
  description: Transmit APIs
  version: '20250101'
  x-go-package: github.com/oapi-codegen/runtime
servers:
- url: https://api.transmitmessage.com
security:
- ApiKeyAuth: []
tags:
- name: RCS
paths:
  /v2/rcs/messages:
    get:
      tags:
      - RCS
      summary: List RCS messages
      description: 'Retrieves a list of RCS messages for your account with flexible date filtering.


        Messages are returned in reverse chronological order (newest first).


        **Date Filtering:**

        - Preset ranges (last_week, last_thirty, last_month): Calculated using your account timezone

        - Custom date ranges: Use RFC3339 timestamps (max 90 days)

        - The ''all'' option provides up to 365 days of history

        - All timestamps in responses are returned in UTC format


        **Pagination:**

        - Cursor-based pagination for efficient data retrieval

        - Control page size with the limit parameter (1-100 messages per page)

        '
      security:
      - ApiKeyAuth: []
      parameters:
      - name: date_range
        in: query
        description: 'Predefined date range filter. Preset ranges use your account timezone to calculate relative dates:

          - ''last_week'': Last 7 days from midnight in your account timezone

          - ''last_thirty'': Last 30 days from midnight in your account timezone

          - ''last_month'': Previous calendar month in your account timezone

          - ''all'': All dates (limited to last 365 days) - default

          - ''custom_date'': Use start_date and end_date parameters with explicit RFC3339 timestamps

          '
        schema:
          type: string
          enum:
          - last_week
          - last_thirty
          - last_month
          - all
          - custom_date
          default: all
          x-go-type-skip-optional-pointer: true
        example: all
      - name: start_date
        in: query
        description: 'Start date for custom date range in RFC3339 format (e.g., 2025-08-26T10:30:00Z).

          Required when date_range is ''custom_date''.

          Must be before end_date.

          '
        schema:
          type: string
          x-go-type-skip-optional-pointer: true
        example: '2025-12-01T00:00:00Z'
      - name: end_date
        in: query
        description: 'End date for custom date range in RFC3339 format (e.g., 2025-08-26T23:59:59Z).

          Required when date_range is ''custom_date''.

          Must be after start_date.

          The range between start_date and end_date cannot exceed 90 days.

          '
        schema:
          type: string
          x-go-type-skip-optional-pointer: true
        example: '2025-12-31T23:59:59Z'
      - name: limit
        in: query
        required: false
        description: Maximum number of messages to return per page (1-100, default 25).
        schema:
          type: integer
          format: int32
          minimum: 1
          maximum: 100
          default: 25
          x-go-type-skip-optional-pointer: true
        example: 25
      - name: cursor
        in: query
        required: false
        description: 'Pagination cursor returned from a previous request.

          Pass the next_cursor or prev_cursor value from a previous response

          to fetch the next or previous page of results. Omit for the first page.

          '
        schema:
          type: string
          x-go-type-skip-optional-pointer: true
        example: MTIzNDU2
      - name: direction
        in: query
        description: 'Pagination direction when using a cursor:

          - ''next'': Get older messages (default, moves forward through history)

          - ''prev'': Get newer messages (moves backward through history)

          '
        schema:
          type: string
          enum:
          - next
          - prev
          default: next
          x-go-type-skip-optional-pointer: true
        example: next
      responses:
        '200':
          $ref: '#/components/responses/ListRcsMessagesSuccessResponse'
        '400':
          $ref: '#/components/responses/InputValidationResponse'
        '401':
          $ref: '#/components/responses/UnauthorizedErrorResponse'
        '500':
          $ref: '#/components/responses/InternalServerErrorResponse'
    post:
      tags:
      - RCS
      summary: Send RCS message
      description: 'This endpoint is in beta and may change in future versions.

        Sends an RCS message to a single recipient.

        '
      security:
      - ApiKeyAuth: []
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/RcsRequest'
      responses:
        '200':
          $ref: '#/components/responses/RCSSuccessResponse'
        '400':
          $ref: '#/components/responses/InputValidationResponse'
        '401':
          $ref: '#/components/responses/UnauthorizedErrorResponse'
        '500':
          $ref: '#/components/responses/InternalServerErrorResponse'
  /v2/rcs/capabilities:
    post:
      tags:
      - RCS
      summary: Check RCS capability for phone numbers
      description: 'Synchronously checks whether a list of phone numbers can receive RCS from your sender.


        Use this **before** sending to decide between RCS and SMS fallback. Designed for routing-time lookups: small batches (1–10 numbers recommended for best latency), immediate response.


        Results are best-effort and reflect capability at the moment of the lookup. **Do not use this as a hard gate** on sending — treat `UNKNOWN` as reachable and rely on SMS fallback for hard delivery guarantees.

        '
      security:
      - ApiKeyAuth: []
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/RcsCapabilityCheckRequest'
      responses:
        '200':
          $ref: '#/components/responses/RcsCapabilityCheckSuccessResponse'
        '400':
          $ref: '#/components/responses/InputValidationResponse'
        '401':
          $ref: '#/components/responses/UnauthorizedErrorResponse'
        '403':
          $ref: '#/components/responses/ForbiddenErrorResponse'
        '429':
          $ref: '#/components/responses/TooManyRequestsErrorResponse'
        '500':
          $ref: '#/components/responses/InternalServerErrorResponse'
  /v2/rcs/messages/{id}:
    get:
      tags:
      - RCS
      summary: Get RCS message
      description: 'Retrieves details of a previously sent RCS message by its unique identifier.

        Returns message content, delivery status, and metadata.

        '
      security:
      - ApiKeyAuth: []
      parameters:
      - name: id
        in: path
        required: true
        description: Unique identifier of the RCS message to retrieve
        schema:
          type: string
          format: uuid
          example: 550e8400-e29b-41d4-a716-446655440000
      responses:
        '200':
          $ref: '#/components/responses/GetSuccessResponse'
        '401':
          $ref: '#/components/responses/UnauthorizedErrorResponse'
        '404':
          $ref: '#/components/responses/NotFoundErrorResponse'
        '500':
          $ref: '#/components/responses/InternalServerErrorResponse'
components:
  responses:
    RcsCapabilityCheckSuccessResponse:
      description: OK
      content:
        application/json:
          schema:
            allOf:
            - $ref: '#/components/schemas/CommonSuccessResponse'
            - type: object
              properties:
                data:
                  $ref: '#/components/schemas/RcsCapabilityCheckData'
          example:
            data:
              results:
              - phone_number: '61400000000'
                code: ENABLED
              - phone_number: '61400000001'
                code: UNREACHABLE
            request: {}
            meta: {}
    InternalServerErrorResponse:
      description: Internal Server Error
      content:
        application/json:
          schema:
            allOf:
            - $ref: '#/components/schemas/CommonErrorResponse'
            - type: object
              properties:
                error:
                  $ref: '#/components/schemas/InternalServerErrorProblem'
    ListRcsMessagesSuccessResponse:
      description: OK
      content:
        application/json:
          schema:
            allOf:
            - $ref: '#/components/schemas/CommonSuccessResponse'
            - type: object
              properties:
                data:
                  $ref: '#/components/schemas/RcsListMessagesData'
                meta:
                  $ref: '#/components/schemas/RcsListMessagesMeta'
          example:
            data:
              messages:
              - id: 6fdae71c-dad7-4c36-9734-a69693ecf3b4
                message_ref: optional-ref-123
                sender: DemoSender
                recipient: '61411122211'
                content_type: text
                content:
                  text:
                    message: Hi Michael, just a quick reminder. You are amazing!
                status: DELIVERED
                created_at: '2021-01-01T00:00:00Z'
            request: {}
            meta:
              pagination:
                type: cursor
                next_cursor: MTIzNDU2
                prev_cursor: null
                has_next: true
                has_prev: false
    ForbiddenErrorResponse:
      description: Forbidden
      content:
        application/json:
          schema:
            allOf:
            - $ref: '#/components/schemas/CommonErrorResponse'
            - type: object
              properties:
                error:
                  $ref: '#/components/schemas/ForbiddenProblem'
    NotFoundErrorResponse:
      description: Not Found
      content:
        application/json:
          schema:
            allOf:
            - $ref: '#/components/schemas/CommonErrorResponse'
            - type: object
              properties:
                error:
                  $ref: '#/components/schemas/NotFoundProblem'
    TooManyRequestsErrorResponse:
      description: Too Many Requests
      content:
        application/json:
          schema:
            allOf:
            - $ref: '#/components/schemas/CommonErrorResponse'
            - type: object
              properties:
                error:
                  $ref: '#/components/schemas/TooManyRequestsProblem'
    GetSuccessResponse:
      description: OK
      content:
        application/json:
          schema:
            allOf:
            - $ref: '#/components/schemas/CommonSuccessResponse'
            - type: object
              properties:
                data:
                  $ref: '#/components/schemas/RcsGetResponse'
          example:
            data:
              id: 6fdae71c-dad7-4c36-9734-a69693ecf3b4
              account_id: '123123'
              message_ref: order-12345
              sender: DemoSender
              recipient: '447903749662'
              content_type: text
              content:
                text:
                  message: 'Hi Michael,

                    Just a quick reminder. You are amazing!!

                    Reply STOP to opt out.'
              created_at: '2021-01-01T00:00:00Z'
              status: DELIVERED
              events:
              - event_type: SENT
                created_at: '2021-01-01T00:00:30Z'
                details: Message sent to Google RCS gateway
              - event_type: DELIVERED
                created_at: '2021-01-01T00:01:15Z'
                details: Message delivered to recipient device
            request: {}
            meta: {}
    RCSSuccessResponse:
      description: OK
      content:
        application/json:
          schema:
            allOf:
            - $ref: '#/components/schemas/CommonSuccessResponse'
            - type: object
              properties:
                data:
                  $ref: '#/components/schemas/RcsResponse'
          example:
            data:
              id: 6fdae71c-dad7-4c36-9734-a69693ecf3b4
              message_ref: order-12345
              sender: DemoSender
              recipient: '447903749662'
              content_type: text
              content:
                text:
                  message: 'Hi Michael,

                    Just a quick reminder. You are amazing!!

                    Reply STOP to opt out.'
              created_at: '2021-01-01T00:00:00Z'
            request: {}
            meta: {}
    InputValidationResponse:
      description: Input Validation Error
      content:
        application/json:
          schema:
            allOf:
            - $ref: '#/components/schemas/CommonErrorResponse'
            - type: object
              properties:
                error:
                  $ref: '#/components/schemas/InputValidationProblem'
    UnauthorizedErrorResponse:
      description: Unauthorized
      content:
        application/json:
          schema:
            allOf:
            - $ref: '#/components/schemas/CommonErrorResponse'
            - type: object
              properties:
                error:
                  $ref: '#/components/schemas/UnauthorizedProblem'
  schemas:
    RcsContentType:
      type: string
      description: Type of the message content.
      enum:
      - text
    CommonErrorResponse:
      allOf:
      - type: object
        properties:
          error:
            $ref: '#/components/schemas/ProblemDetails'
        required:
        - error
      - $ref: '#/components/schemas/CommonResponseMeta'
    ProblemDetails:
      description: 'A Problem Details object (RFC 9457).


        Additional properties specific to the problem type may be present.

        '
      type: object
      properties:
        type:
          $ref: '#/components/schemas/Uri'
        title:
          type: string
          description: A short summary of the problem type. Written in English and readable for engineers (usually not suited for non technical stakeholders and not localized).
        detail:
          type: string
          description: A human-readable explanation specific to this occurrence of the problem
        status:
          type: integer
          description: The HTTP status code corresponding to this error.
      required:
      - type
      - title
      - detail
      - status
      example:
        type: https://developers.kudosity.com/reference/errors
        title: Description of the type of problem that occurred
        detail: Description of specific occurrence of the problem
        status: 400
    Uri:
      type: string
      description: string providing an URI formatted according to IETF RFC 3986.
      format: uri
    RcsRequest:
      type: object
      properties:
        sender:
          type: string
          description: 'The RCS agent ID assigned to your registered agent.


            Unlike SMS, WhatsApp, and MMS, RCS messages do not come from a phone number.

            They are always sent through an agent.


            - Must be a registered RCS agent identifier.

            - Example: `DemoSender`

            - Can be alphanumeric or numeric.

            '
        recipient:
          type: string
          format: phone
          description: 'The destination number for delivery.

            Can be either in local format or in international format.

            For international format, it should follow the [E.164 standard](http://en.wikipedia.org/wiki/E.164).


            Examples of conversions to E.164 format:

            - Australia: 0438 333 061 → 61438333061

            - UK: 07123 456 789 → 447123456789

            '
        content_type:
          type: string
          description: Type of the message content (currently only text supported).
          enum:
          - text
        content:
          type: object
          description: 'The message content to be sent.


            - Supports both Basic RCS messages (160 characters) and Simple RCS messages (3072 characters)

            - UTF-8 and emoji support included

            '
          oneOf:
          - $ref: '#/components/schemas/RCSTextContent'
        sms_fallback:
          $ref: '#/components/schemas/RCSSMSFallback'
        message_ref:
          type: string
          x-go-type-skip-optional-pointer: true
          description: 'A reference supplied by your system. Maximum length of 500 characters.


            This reference is included in webhook events so you can relate events with the original message.


            For example, being able to relate a Link Hit event to a specific sent message.

            '
      required:
      - sender
      - recipient
      - content_type
      - content
      example:
        sender: DemoSender
        recipient: '447903749662'
        content_type: text
        content:
          text:
            message: 'Hi Michael,

              Just a quick reminder. You are amazing!!

              Reply STOP to opt out.'
        message_ref: order-12345
    RcsListMessagesData:
      type: object
      description: Container for the list of RCS messages.
      properties:
        messages:
          type: array
          description: Array of RCS messages.
          items:
            $ref: '#/components/schemas/RcsListMessageItem'
      required:
      - messages
    RcsListMessageItem:
      type: object
      description: Summary representation of an RCS message for list responses.
      properties:
        id:
          type: string
          description: Unique identifier for the message.
        message_ref:
          type: string
          x-go-type-skip-optional-pointer: true
          description: Optional reference ID set by the user for the message.
        sender:
          type: string
          description: Registered RCS Agent ID.
        recipient:
          type: string
          format: phone
          description: RCS recipient phone number in international format.
        content_type:
          $ref: '#/components/schemas/RcsContentType'
        content:
          type: object
          description: Content details for the message.
          oneOf:
          - $ref: '#/components/schemas/RCSTextContent'
        status:
          $ref: '#/components/schemas/RcsMessageStatus'
        created_at:
          type: string
          format: date-time
          description: Timestamp in RFC3339 format (e.g., 2025-08-26T10:30:00Z) when the message was created on the server.
      required:
      - id
      - sender
      - recipient
      - content_type
      - content
      - status
      - created_at
      example:
        id: 6fdae71c-dad7-4c36-9734-a69693ecf3b4
        message_ref: optional-ref-123
        sender: DemoSender
        recipient: '61411122211'
        content_type: text
        content:
          text:
            message: Hi Michael, just a quick reminder. You are amazing!
        status: DELIVERED
        created_at: '2021-01-01T00:00:00Z'
    RcsResponse:
      type: object
      properties:
        id:
          type: string
          description: Unique identifier for the message.
        message_ref:
          type: string
          x-go-type-skip-optional-pointer: true
          description: Optional reference ID set by the user for the message.
        sender:
          type: string
          description: Registered RCS Agent ID.
        recipient:
          type: string
          description: Recipient phone number in international format.
        content_type:
          type: string
          description: Type of the message content.
          enum:
          - text
        content:
          type: object
          description: Content of the message.
          oneOf:
          - $ref: '#/components/schemas/RCSTextContent'
        sms_fallback:
          $ref: '#/components/schemas/RCSSMSFallback'
        created_at:
          type: string
          format: date-time
          description: Timestamp in RFC3339 format (e.g., 2025-08-26T10:30:00Z) when the message was created on the server.
      required:
      - id
      - sender
      - recipient
      - content_type
      - content
      - created_at
      example:
        id: 6fdae71c-dad7-4c36-9734-a69693ecf3b4
        message_ref: order-12345
        sender: DemoSender
        recipient: '447903749662'
        content_type: text
        content:
          text:
            message: 'Hi Michael,

              Just a quick reminder. You are amazing!!

              Reply STOP to opt out.'
        created_at: '2021-01-01T00:00:00Z'
    TooManyRequestsProblem:
      description: 'HTTP 429 Too Many Requests - Rate limit exceeded.


        Your client application has sent too many requests in a given amount of time and should retry later.

        '
      type: object
      allOf:
      - $ref: '#/components/schemas/ProblemDetails'
      example:
        type: https://developers.kudosity.com/reference/errors#too-many-requests
        title: Too Many Requests
        detail: Rate limit exceeded
        status: 429
    RCSTextContent:
      type: object
      properties:
        text:
          $ref: '#/components/schemas/RCSText'
      required:
      - text
    RcsListMessagesMeta:
      type: object
      description: Metadata for the list messages response including pagination details.
      properties:
        pagination:
          $ref: '#/components/schemas/PaginationMeta'
      required:
      - pagination
    ForbiddenProblem:
      description: 'HTTP 403 Forbidden - Access to the requested resource is forbidden.


        Your client application is authenticated but does not have permission to access this resource.

        '
      type: object
      allOf:
      - $ref: '#/components/schemas/ProblemDetails'
      example:
        type: https://developers.kudosity.com/reference/errors#forbidden
        title: Forbidden
        detail: Access to this resource is forbidden
        status: 403
    RCSText:
      type: object
      description: Text content for the message.
      properties:
        message:
          type: string
          minLength: 1
          maxLength: 3072
          description: 'The text message body.


            **Message Types:**

            - **Basic RCS Messages**: Up to 160 characters (SMS format in RCS)

            - **Simple RCS Messages**: Up to 3072 characters with emoji and UTF-8 support

            '
      required:
      - message
    RcsCapabilityCheckData:
      type: object
      description: Capability check results for the requested phone numbers.
      properties:
        results:
          type: array
          description: One entry per phone number from the request, in the same order.
          items:
            $ref: '#/components/schemas/RcsCapabilityResult'
      required:
      - results
    InternalServerErrorProblem:
      description: 'This problem occurs when the server encounters an unexpected condition that prevents it from fulfilling the request.


        Your client application did everything correct. Unfortunately our API encountered a condition that resulted in this problem.

        '
      type: object
      allOf:
      - $ref: '#/components/schemas/ProblemDetails'
      example:
        type: https://developers.kudosity.com/reference/errors#server-error
        title: Server Error
        detail: The server encountered an unexpected error
        status: 500
    RcsCapabilityResult:
      type: object
      description: RCS capability result for a single phone number.
      properties:
        phone_number:
          type: string
          description: The phone number that was checked, in E.164 format without the leading `+`.
        code:
          type: string
          enum:
          - ENABLED
          - UNREACHABLE
          - REJECTED_NETWORK
          - REJECTED_ROUTE_NOT_AVAILABLE
          - REQUEST_FAILED
          - PROCESSING_ERROR
          - INVALID_DESTINATION_ADDRESS
          - UNKNOWN
          description: 'RCS capability for the number.


            - `ENABLED` — the number can receive RCS messages from the specified sender.

            - `UNREACHABLE` — the number cannot receive RCS messages from the specified sender.

            - `REJECTED_NETWORK` — message not sent, network not allowed.

            - `REJECTED_ROUTE_NOT_AVAILABLE` — route not available for that sender.

            - `REQUEST_FAILED` — external problems during capability check.

            - `PROCESSING_ERROR` — the results for the number couldn''t be processed; the caller should retry.

            - `INVALID_DESTINATION_ADDRESS` — number provided in wrong format.

            - `UNKNOWN` — unknown error from upstream, or any value the API did not otherwise recognise; contact support if it persists.

            '
      required:
      - phone_number
      - code
      example:
        phone_number: '61400000000'
        code: ENABLED
    InputValidationProblem:
      description: 'This problem occurs when the request is deemed unprocessable.


        Your client issued a request that failed validation. Certain validation libraries return multi-errors and cannot be easily parsed into discreet types. This problem type, afforded the provider with the ability to surface all validation errors and negate the need for a trial and error workflow on your side.

        '
      type: object
      allOf:
      - $ref: '#/components/schemas/ProblemDetails'
      - properties:
          issues:
            description: An array of issues detected during input validation.
            type: array
            x-go-type-skip-optional-pointer: true
            items:
              $ref: '#/components/schemas/InputValidationIssue'
      example:
        type: https://developers.kudosity.com/reference/errors#input-validation
        title: Invalid Request
        detail: Request validation failed
        status: 400
        issues:
        - name: field_name
          message: field_name is required
    RCSMessageEvent:
      type: object
      description: Lifecycle event for an RCS message.
      properties:
        event_type:
          type: string
          description: 'Type of event: one of `SENT`, `DELIVERED`, `READ`, `FAILED`.'
          enum:
          - SENT
          - DELIVERED
          - READ
          - FAILED
        created_at:
          type: string
          format: date-time
          description: Timestamp in RFC3339 format (e.g., 2025-08-26T10:30:00Z) when the event occurred.
        details:
          type: string
          description: Description of the event.
      required:
      - event_type
      - created_at
      - details
      example:
        event_type: DELIVERED
        created_at: '2024-01-15T14:31:42Z'
        details: Message delivered to recipient device
    InputValidationIssue:
      type: object
      description: 'An issue detected during input validation.

        '
      properties:
        name:
          type: string
          description: The name of the param or field that failed validation.
          x-go-type-skip-optional-pointer: true
        code:
          type: integer
          description: The internal api specific error code.
          x-go-type-skip-optional-pointer: true
        message:
          description: The error message
          type: string
          x-go-type-skip-optional-pointer: true
    CommonResponseMeta:
      type: object
      properties:
        request:
          type: object
          description: Optional metadata (e.g. requestId, traceId)
        meta:
          type: object
          description: Optional pagination, feature flags, etc.
    UnauthorizedProblem:
      description: 'HTTP 401 Unauthorized - API authentication failed.


        The request was rejected because the API key is missing, invalid, expired, or lacks sufficient permissions for this resource. Check your Authorization header and API key configuration.

        '
      type: object
      allOf:
      - $ref: '#/components/schemas/ProblemDetails'
      example:
        type: https://developers.kudosity.com/reference/errors#unauthorized
        title: API Authentication Failed
        detail: Missing or invalid API key in Authorization header. Verify your API key is correct and has the required permissions
        status: 401
    RcsMessageStatus:
      type: string
      description: Current status of an RCS message.
      enum:
      - QUEUED
      - SENT
      - DELIVERED
      - READ
      - FAILED
    RcsCapabilityCheckRequest:
      type: object
      description: Request payload for the synchronous RCS capability check.
      properties:
        sender:
          type: string
          description: 'The RCS sender assigned to your account.


            - Example: `DemoSender`

            '
        phone_numbers:
          type: array
          description: 'Phone numbers to check, in [E.164](http://en.wikipedia.org/wiki/E.164) format without the leading `+`.


            For best latency we recommend batches of 1–10. The endpoint accepts up to 100 numbers per request.

            '
          minItems: 1
          maxItems: 100
          items:
            type: string
            format: phone
            example: '61400000000'
      required:
      - sender
      - phone_numbers
      example:
        sender: DemoSender
        phone_numbers:
        - '61400000000'
        - '61400000001'
    PaginationMeta:
      title: Pagination Metadata
      description: 'Pagination metadata for cursor-based pagination.

        Reusable across all paginated API endpoints.

        '
      type: object
      required:
      - type
      - has_next
      - has_prev
      properties:
        type:
          type: string
          description: The pagination strategy being used.
          enum:
          - cursor
          example: cursor
          x-oapi-codegen-extra-tags:
            valid: required
        next_cursor:
          type:
          - string
          - 'null'
          description: Cursor to fetch the next page of results. Omitted if there are no more results.
          example: MTIzNDU2
          x-oapi-codegen-extra-tags:
            json: next_cursor,omitempty
        prev_cursor:
          type:
          - string
          - 'null'
          description: Cursor to fetch the previous page of results. Omitted if on the first page.
          example: MTIzNDkw
          x-oapi-codegen-extra-tags:
            json: prev_cursor,omitempty
        has_next:
          type: boolean
          description: Indicates whether there are more results available after the current page.
          example: true
          x-oapi-codegen-extra-tags:
            valid: required
        has_prev:
          type: boolean
          description: Indicates whether there are results available before the current page.
          example: false
          x-oapi-codegen-extra-tags:
            valid: required
    RCSSMSFallback:
      type: object
      description: 'Provides intelligent fallback for non-RCS capable devices and carrier delivery issues. If the RCS message fails, the SMS will send the configured message to the recipient instead.

        '
      properties:
        sender:
          type: string
          description: The sender number to use for SMS fallback, which can be in [E.164](http://en.wikipedia.org/wiki/E.164) international format or an alphanumeric sender ID.
          x-go-type-skip-optional-pointer: true
        message:
          type: string
          description: The message to send through SMS. SMS messages are subject to certain character limitations, please read our SMS documentation for details.
      required:
      - message
    NotFoundProblem:
      description: 'This problem occurs when the requested resource could not be found.


        Your client application tried to access a resource that does not exist (or could not be found). Please review how your users initiated such a request.

        '
      type: object
      allOf:
      - $ref: '#/components/schemas/ProblemDetails'
      example:
        type: https://developers.kudosity.com/reference/errors#not-found
        title: Not Found
        detail: The requested resource was not found
        status: 404
    RcsGetResponse:
      type: object
      properties:
        id:
          type: string
          description: Unique identifier for the message.
        account_id:
          type: string
          description: Account identifier that sent the message.
        message_ref:
          type: string
          x-go-type-skip-optional-pointer: tr

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# Full source: https://raw.githubusercontent.com/api-evangelist/kudosity/refs/heads/main/openapi/kudosity-rcs-api-openapi.yml