send_audio

Instructions

Implementation Reference

• src/tools/messages.ts:69-87 (handler)

  Handler function for the 'send_audio' tool. It sends an audio file to a WhatsApp chat by making a POST request to the OpenWA API endpoint /sessions/{sessionId}/messages/send-audio with chatId and url (publicly accessible URL of the audio file) in the request body.

  server.registerTool(
    "send_audio",
    {
      description: "Send an audio file to a WhatsApp chat by providing a publicly accessible URL",
      inputSchema: {
        sessionId: z.string().describe("Session ID to send from"),
        chatId: z.string().describe("Target chat ID"),
        url: z.string().describe("Public URL of the audio file"),
      },
    },
    async ({ sessionId, chatId, url }) => {
      const data = await openwaClient({
        method: "POST",
        path: `/sessions/${sessionId}/messages/send-audio`,
        body: { chatId, url },
      });
      return { content: [{ type: "text" as const, text: JSON.stringify(data, null, 2) }] };
    }
  );

• src/tools/messages.ts:71-77 (schema)

  Input schema for the 'send_audio' tool: sessionId (string), chatId (string), url (string). All are required (no optional fields).

  {
    description: "Send an audio file to a WhatsApp chat by providing a publicly accessible URL",
    inputSchema: {
      sessionId: z.string().describe("Session ID to send from"),
      chatId: z.string().describe("Target chat ID"),
      url: z.string().describe("Public URL of the audio file"),
    },

• src/tools/messages.ts:69-87 (registration)

  Registration of the 'send_audio' tool via server.registerTool() inside the registerMessageTools() function.

  server.registerTool(
    "send_audio",
    {
      description: "Send an audio file to a WhatsApp chat by providing a publicly accessible URL",
      inputSchema: {
        sessionId: z.string().describe("Session ID to send from"),
        chatId: z.string().describe("Target chat ID"),
        url: z.string().describe("Public URL of the audio file"),
      },
    },
    async ({ sessionId, chatId, url }) => {
      const data = await openwaClient({
        method: "POST",
        path: `/sessions/${sessionId}/messages/send-audio`,
        body: { chatId, url },
      });
      return { content: [{ type: "text" as const, text: JSON.stringify(data, null, 2) }] };
    }
  );

• src/client.ts:10-35 (helper)

  The openwaClient helper function used by the handler to make HTTP requests to the OpenWA API. It constructs the URL from BASE_URL + path, adds API key header, and sends the request.

  export async function openwaClient<T = unknown>(opts: RequestOptions): Promise<T> {
    const url = `${BASE_URL}${opts.path}`;
  
    const headers: Record<string, string> = {
      "Content-Type": "application/json",
      "X-API-Key": API_KEY,
    };
  
    const res = await fetch(url, {
      method: opts.method,
      headers,
      body: opts.body ? JSON.stringify(opts.body) : undefined,
    });
  
    const text = await res.text();
  
    if (!res.ok) {
      throw new Error(`OpenWA API ${res.status}: ${text}`);
    }
  
    try {
      return JSON.parse(text) as T;
    } catch {
      return text as T;
    }
  }