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30## What is the adapter for?
31
32The MCP TypeScript SDK uses Node-specific APIs that don't play nicely with Deno
33or edge functions:
34

4const app = new Hono();
5
6// --- NEW VAPI WEBHOOK ENDPOINT ---
7app.post("/vapi-webhook", async (c) => {
8  try {
9    const webhookData = await c.req.json(); // Parse the incoming JSON payload from Vapi
10
11    // As per Vapi's 'end-of-call-report' format, the main payload is under 'message'
12    if (webhookData && typeof webhookData.message === "object" && webhookData.message !== null) {
13      console.log("--- Received Vapi End-of-Call Report Message ---");
14      // Print the entire 'message' object, pretty-formatted for readability in Val Town logs
15      console.log(JSON.stringify(webhookData.message, null, 2));
16      console.log("--- End of Vapi Report ---");
17    } else {
18      console.warn(
19        "Received Vapi webhook payload, but 'message' field was not an object or was missing. Full payload:",
20        webhookData,
21      );
22    }
23
24    // Always return a 200 OK status to Vapi to acknowledge successful receipt of the webhook.
25    // If you don't return 200, Vapi might retry sending the webhook.
26    return c.json({ status: "success", message: "Webhook received and processed" }, 200);
27  } catch (error) {
28    // If there's any error during processing, log it and return a 500 status.
29    console.error("Error processing Vapi webhook:", error);
30    return c.json({ status: "error", message: "Failed to process webhook" }, 500);
31  }