> ## Documentation Index > Fetch the complete documentation index at: https://docs.vocobase.com/llms.txt > Use this file to discover all available pages before exploring further. # Send a WhatsApp template message > Queues a template message on one of your WhatsApp connections and returns immediately with a `log_id`. Delivery is asynchronous — track it through your provider's delivery webhooks. Which fields are required depends on the connection: AiSensy Campaign connections need `campaign_name`; every other connection needs `template_name` and `language_code`. `to` is parsed, not pattern-matched, and carries no default country — it must include its own country code. ## OpenAPI ````yaml /openapi.json post /messaging/send openapi: 3.1.0 info: title: Vocobase API version: '2.0' description: >- API for managing voice AI agents, documents, and calls on the Vocobase platform. servers: - url: https://api.vocobase.com/api/v2 description: Production security: - bearerAuth: [] tags: - name: Config description: >- Read and update account configuration, webhook settings, and telephony credentials. - name: Agents description: Create, read, update, and delete voice AI agents. - name: Voices description: >- List voice tiers, available voices, and stream preview audio for agent configuration. - name: Documents description: Upload, manage, and delete knowledge base documents. - name: Agent Documents description: Link and unlink documents to agents for knowledge base integration. - name: Calls description: Initiate outbound calls and view call history. - name: Phone Numbers description: >- Import DIDs, assign agents for inbound routing, and re-sync carrier Application bindings. - name: Inbound Routing Policies description: >- Define pre-answer routing decisions for inbound calls before AI sessions are created. - name: Telephony Connections description: Create, list, rename, and disconnect named V2 telephony connections. - name: VoiceLink Management description: Manage VoiceLink reseller clients, DID mapping, and readiness sync. - name: Projects description: Organize agents into projects. Every agent belongs to exactly one project. - name: Dictionaries description: Speech-recognition dictionary CRUD and agent attachment. - name: Sessions description: Browser-initiated WebRTC voice sessions for in-app voice agents. - name: Campaigns description: Batch outbound calling. - name: Billing description: Balance, transactions, and usage summaries. - name: Custom Functions description: HTTP endpoints the agent can call mid-conversation. - name: Extraction Sets description: Reusable sets of post-call extraction fields. - name: Lifecycle Hooks description: Automatic pre-call and post-call integration steps. - name: Messaging description: Bring-your-own WhatsApp sending. - name: Integration Logs description: Audit trail for integration calls. - name: Connectors description: Catalog of tools an agent can be connected to. - name: Customers description: B2B2B sub-tenants and their tool connections. - name: Agent Tools description: Binding connectors and connections to an agent. paths: /messaging/send: post: tags: - Messaging summary: Send a WhatsApp template message description: >- Queues a template message on one of your WhatsApp connections and returns immediately with a `log_id`. Delivery is asynchronous — track it through your provider's delivery webhooks. Which fields are required depends on the connection: AiSensy Campaign connections need `campaign_name`; every other connection needs `template_name` and `language_code`. `to` is parsed, not pattern-matched, and carries no default country — it must include its own country code. operationId: sendWhatsappMessage requestBody: required: true content: application/json: schema: type: object required: - connection_id - to properties: connection_id: type: string format: uuid to: type: string description: Destination in E.164, including the country code. campaign_name: type: string description: Required for AiSensy Campaign connections. template_name: type: string description: Required for all other connections. language_code: type: string description: Required with `template_name`, e.g. `en`. variables: type: array items: type: string description: Template body variables, in order. header_values: type: array items: type: string description: Template header variables, in order. example: connection_id: mc_4d5e6f70-8192-a3b4-c5d6-e7f809122334 to: '+919876543210' campaign_name: renewal_followup variables: - Asha - 1 September responses: '202': description: Queued for delivery. content: application/json: schema: type: object properties: success: type: boolean const: true data: type: object properties: log_id: type: string format: uuid description: Use it to correlate provider delivery webhooks. status: type: string const: QUEUED example: success: true data: log_id: ml_5e6f7081-92a3-b4c5-d6e7-f80912233445 status: QUEUED '400': description: >- `VALIDATION_ERROR` for a missing or malformed field. `CONNECTION_INACTIVE` when the connection has not been verified. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: success: false error: code: CONNECTION_INACTIVE message: connection is not ACTIVE '401': $ref: '#/components/responses/Unauthorized' '404': $ref: '#/components/responses/NotFound' '429': $ref: '#/components/responses/RateLimitExceeded' '500': $ref: '#/components/responses/InternalError' components: schemas: ErrorResponse: type: object properties: success: type: boolean const: false error: type: object properties: code: type: string message: type: string required: - code - message required: - success - error responses: Unauthorized: description: Missing or invalid API key. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: success: false error: code: UNAUTHORIZED message: Invalid or missing API key NotFound: description: Resource not found. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: success: false error: code: NOT_FOUND message: Resource not found RateLimitExceeded: description: Per-account rate limit exceeded. Retry after a short backoff. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: success: false error: code: RATE_LIMITED message: Rate limit exceeded. Retry after 60 seconds. InternalError: description: Unexpected server error. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: success: false error: code: INTERNAL_ERROR message: An unexpected error occurred securitySchemes: bearerAuth: type: http scheme: bearer description: >- API key in format: `rg_live_xxxx`. Pass as a Bearer token in the Authorization header. ````