whatsapp_send_audio
Send audio files to WhatsApp contacts or groups using URLs or base64 encoding. Supports multiple audio formats and includes features for mentions, replies, forwarding, and view-once messages.
Instructions
Send an audio file message to a WhatsApp contact or group. Can send from URL or base64.
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| to | Yes | Recipient phone number (with @s.whatsapp.net) or group ID (with @g.us) | |
| audioBase64 | No | Base64 encoded audio data (alternative to audioURL) | |
| audioURL | No | URL of the audio file to send (alternative to audioBase64) | |
| mimeType | Yes | MIME type of the audio file | |
| mentions | No | List of phone numbers to mention | |
| replyTo | No | ID of the message being replied to | |
| isForwarded | No | Whether the message should be marked as forwarded | |
| viewOnce | No | Whether the audio should be sent as view-once |
Implementation Reference
- src/tools/messaging-advanced.ts:23-91 (handler)The ToolHandler object defining the 'whatsapp_send_audio' tool, including its name, description, input schema, and the async handler function that validates input using Zod schema, logs the action, sends the audio via wsapiClient.post('/messages/audio'), and returns a success response with message ID.export const sendAudioMessage: ToolHandler = { name: 'whatsapp_send_audio', description: 'Send an audio file message to a WhatsApp contact or group. Can send from URL or base64.', inputSchema: { type: 'object', properties: { to: { type: 'string', description: 'Recipient phone number (with @s.whatsapp.net) or group ID (with @g.us)', }, audioBase64: { type: 'string', description: 'Base64 encoded audio data (alternative to audioURL)', optional: true, }, audioURL: { type: 'string', description: 'URL of the audio file to send (alternative to audioBase64)', optional: true, }, mimeType: { type: 'string', enum: ['audio/mpeg', 'audio/mp3', 'audio/ogg', 'audio/wav'], description: 'MIME type of the audio file', }, mentions: { type: 'array', items: { type: 'string' }, description: 'List of phone numbers to mention', optional: true, }, replyTo: { type: 'string', description: 'ID of the message being replied to', optional: true, }, isForwarded: { type: 'boolean', description: 'Whether the message should be marked as forwarded', optional: true, }, viewOnce: { type: 'boolean', description: 'Whether the audio should be sent as view-once', optional: true, }, }, required: ['to', 'mimeType'], }, handler: async (args: any) => { const input = validateInput(sendAudioMessageSchema, args) as SendAudioMessageInput; logger.info('Sending audio message', { to: input.to, mimeType: input.mimeType, viewOnce: input.viewOnce, }); const result = await wsapiClient.post('/messages/audio', input); logger.info('Audio message sent successfully', { messageId: result.id }); return { success: true, messageId: result.id, message: 'Audio message sent successfully', }; }, };
- src/validation/schemas.ts:48-59 (schema)Zod schema for validating input to the whatsapp_send_audio tool, including fields like to, audioBase64/audioURL (one required), mimeType, mentions, etc., used in the handler via validateInput.export const sendAudioMessageSchema = z.object({ to: chatIdSchema, audioBase64: base64Schema.optional(), audioURL: urlSchema.optional(), mimeType: z.enum(['audio/mpeg', 'audio/mp3', 'audio/ogg', 'audio/wav']), mentions: z.array(phoneNumberSchema).optional(), replyTo: messageIdSchema.optional(), isForwarded: z.boolean().optional(), viewOnce: z.boolean().optional(), }).refine(data => data.audioBase64 || data.audioURL, { message: "Either audioBase64 or audioURL must be provided", });
- src/server.ts:53-79 (registration)The setupToolHandlers method in the MCP server that registers all tools by iterating over tool categories including messagingTools (which includes whatsapp_send_audio via advancedMessagingTools), adding them to the internal tools Map for execution.private setupToolHandlers(): void { logger.info('Setting up tool handlers'); // Register all tool categories const toolCategories = [ messagingTools, contactTools, groupTools, chatTools, sessionTools, instanceTools, accountTools, ]; toolCategories.forEach(category => { Object.values(category).forEach(tool => { if (this.tools.has(tool.name)) { logger.warn(`Tool ${tool.name} already registered, skipping`); return; } this.tools.set(tool.name, tool); logger.debug(`Registered tool: ${tool.name}`); }); }); logger.info(`Registered ${this.tools.size} tools`); }