> ## Documentation Index > Fetch the complete documentation index at: https://docs.wavix.com/llms.txt > Use this file to discover all available pages before exploring further. # Send a message > Sends an SMS or MMS message. MMS is supported for U.S. numbers only. Track delivery using the returned `message_id` and the message status callback. **Rate limit**: 20 messages per phone number in 24 hours. ## OpenAPI ````yaml https://wavix.github.io/wavix-openapi/wavix-api.yaml post /v3/messages openapi: 3.1.0 info: title: Wavix APIs description: >- Wavix provides robust APIs that let you integrate voice and text messaging features directly into your app. Send text, place calls, and access detailed reports programmatically. termsOfService: https://wavix.com/terms-and-conditions license: name: MIT identifier: MIT contact: name: Wavix url: https://wavix.com email: support@wavix.com version: '1.0' servers: - url: https://api.wavix.com description: https://api.wavix.com variables: {} security: - bearerAuth: [] tags: - name: SIP trunks description: SIP trunks - name: Buy description: Numbers - name: Cart description: Numbers - name: My numbers description: Numbers - name: Billing description: Billing, transactions, and invoices - name: Profile description: Account profile and customer information - name: CDRs description: Call detail records and call history - name: Speech Analytics description: Call transcription and speech analytics - name: SMS and MMS description: Messaging - name: Number Validator description: Phone number validation - name: Link shortener description: Short link and click metrics - name: 2FA description: Two-factor authentication - name: 10DLC description: 10DLC Campaigns and Brands - name: API Keys description: API key management - name: Call webhooks description: Webhook configuration for call events - name: Call control description: Programmable Voice - name: Call streaming description: Real-time call audio streaming over WebSocket - name: Call recording description: Call recording - name: Sub-accounts description: Sub-account management - name: Voice campaigns description: Outbound voice campaigns - name: Wavix Embeddable description: WebRTC embeddable widget paths: /v3/messages: post: tags: - SMS and MMS summary: Send a message description: >- Sends an SMS or MMS message. MMS is supported for U.S. numbers only. Track delivery using the returned `message_id` and the message status callback. **Rate limit**: 20 messages per phone number in 24 hours. operationId: sms_and_mms_messages_send parameters: [] requestBody: description: Attributes for the message to send. content: application/json: schema: allOf: - $ref: '#/components/schemas/MessageCreateRequest' - description: Sender, recipient, and content of the message. example: from: Wavix to: '+447537151866' message_body: text: Hi there, this is a message from Wavix media: null callback_url: https://you-site.com/webhook validity: 3600 tag: Fall sale example: from: Wavix to: '+447537151866' message_body: text: Hi there, this is a message from Wavix media: null callback_url: https://you-site.com/webhook validity: 3600 tag: Fall sale required: true responses: '201': description: >- Returns the submitted message with its `message_id` and initial status. headers: {} content: application/json: schema: $ref: '#/components/schemas/SendMessagesResponse' examples: default: value: carrier_fees: '0.0' charge: '0.0' delivered_at: '2024-05-28T12:34:56Z' error_message: null from: Sender mcc: '310' mnc: '260' message_body: text: >- This is a test MMS message with multiple media attachments. media: - >- https://api.examples.com/v3/messages/attachments/abc123/file1.mp3 - >- https://api.examples.com/v3/messages/attachments/abc123/file2.mp3 - >- https://api.examples.com/v3/messages/attachments/abc123/file3.mp3 message_id: abc123de-4567-890f-gh12-ijklmnop3456 message_type: mms segments: 1 sent_at: '2024-05-28T12:34:54Z' status: accepted submitted_at: '2025-09-22T09:07:53' tag: campaign_test to: '+15551234567' '400': $ref: '#/components/responses/BadRequestErrorResponse' '403': $ref: '#/components/responses/ForbiddenErrorResponse' deprecated: false security: - bearerAuth: - messages:write components: schemas: MessageCreateRequest: title: MessageCreateRequest required: - from - to - message_body type: object additionalProperties: false properties: from: type: string description: Sender ID. Numeric or alphanumeric. example: Wavix to: type: string description: Recipient phone number. example: '447537151866' message_body: $ref: '#/components/schemas/MessageBody' callback_url: type: string description: Callback URL for delivery reports. example: https://you-site.com/webhook validity: type: integer description: >- Message validity period in seconds. Delivery attempts stop after this period expires. format: int32 example: 3600 tag: type: string description: Tag to group messages, such as for a specific campaign. example: Fall sale SendMessagesResponse: type: object additionalProperties: false properties: carrier_fees: type: - string - 'null' description: Mobile carrier fees in USD. example: '0.0' charge: type: string description: Total charge for the message in USD. example: '0.0' direction: type: string description: Message direction. Possible values are `outbound`, `inbound`. example: outbound delivered_at: type: - string - 'null' description: Date and time the message was delivered in ISO 8601 format. format: date-time example: '2024-05-28T12:34:56Z' error_message: type: - string - 'null' description: Error message. from: type: string description: Sender ID. example: Sender ID. mcc: type: - string - 'null' description: Mobile country code. example: '310' mnc: type: - string - 'null' description: Mobile network code. example: '260' message_body: $ref: '#/components/schemas/MessageBody' message_id: type: string description: Message ID. example: abc123de-4567-890f-gh12-ijklmnop3456 message_type: type: string description: Message type. example: mms segments: type: integer description: Number of SMS segments. Always 1 for MMS. example: 1 sent_at: type: - string - 'null' description: Date and time the message was sent in ISO 8601 format. format: date-time example: '2024-05-28T12:34:54Z' status: type: string description: Message status. example: accepted submitted_at: type: string description: Date and time the message was submitted in ISO 8601 format. example: '2025-09-22T09:07:53Z' tag: type: - string - 'null' description: Message tag. example: campaign_test to: type: string description: Recipient phone number. example: '+15551234567' MessageBody: title: MessageBody required: - text - media type: object additionalProperties: false properties: text: type: string description: Message text. example: Hi there, this is a sample message media: maxItems: 5 minItems: 0 type: - array - 'null' items: type: string description: |- List of media URLs. If provided, the message is sent as an MMS; otherwise, it is sent as an SMS. example: - https://you-site.com/media ValidationErrorResponse: title: ValidationErrorResponse type: object properties: success: type: boolean description: >- Indicates whether the request was successful. Always `false` for this error. example: false message: type: string description: >- Human-readable description naming the missing or invalid request parameter. example: Missing or invalid parameter ForbiddenErrorResponse: title: ForbiddenErrorResponse type: object properties: success: type: boolean description: >- Indicates whether the request was successful. Always `false` for this error. example: false message: type: string description: Human-readable description of why access is forbidden. example: The service is not provisioned for your account. responses: BadRequestErrorResponse: description: Request failed. Missing or invalid parameter headers: {} content: application/json: schema: $ref: '#/components/schemas/ValidationErrorResponse' ForbiddenErrorResponse: description: Request failed. The feature is disabled for your account. headers: {} content: application/json: schema: $ref: '#/components/schemas/ForbiddenErrorResponse' securitySchemes: bearerAuth: type: http scheme: bearer description: > Wavix API key. Pass as `Authorization: Bearer `. Keys support per-resource scopes (none / read / write). See [Restricted keys and scopes](https://docs.wavix.com/api-reference/authentication#restricted-keys-and-scopes). ````