How to Use the WhatsApp Message Sender MCP in Vercel AI SDK

Q: What kind of numbers can I use with the WhatsApp Message Sender on Vercel AI SDK?

The sendwhatsappmessage tool requires the destination phone number to be provided in E.164 format, without any plus signs. You'll need this specific structure for the 'to' parameter.

Send live WhatsApp messages directly to the user's frontend with Vercel AI SDK.

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Connect WhatsApp Message Sender MCP to Vercel AI SDK

Create your Vinkius account to connect WhatsApp Message Sender to Vercel AI SDK and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

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Setup WhatsApp Message Sender with Vercel AI SDK

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Stream WhatsApp Messages in Real Time

The `send_whatsapp_message` tool sends a text message using the official Meta API. When your agent runs this, you stream the result directly to the UI, so users see 'Message Sent' appear live, not after a loading spinner. This real-time capability makes building chat interfaces simple. It lets your client interact with the WhatsApp Message Sender service while keeping the user engaged by showing data updates instantly.

Direct Messaging from Edge Functions

You can integrate the `send_whatsapp_message` tool into an Edge Function setup. Your agent calls this function to send a message, and because it’s running at the edge, latency is low. It handles sending text messages using the E.164 format for the recipient number. This ensures fast execution when you need your AI client to communicate with a customer immediately. You're not stuck waiting on slow API calls; the message gets out right away.

Client-Side WhatsApp Message Sender Calls

Using `send_whatsapp_message` allows you to write frontends that call external services like the WhatsApp Message Sender. The tool requires a destination number in E.164 format, making sure your data is clean before sending. This structured approach keeps your UI code focused on presentation while letting your agent handle all backend communication. You're building robust apps where messaging isn't just tacked on.

Setup guide

Set up WhatsApp Message Sender MCP in Vercel AI SDK

Prerequisites

Node.js 18+ and a TypeScript project
ai + @modelcontextprotocol/sdk packages
Active Vinkius subscription with a valid endpoint token

1

Install dependencies

Run npm install ai @modelcontextprotocol/sdk plus your preferred model provider (e.g. @ai-sdk/openai).
2

Create the Streamable HTTP transport

Use StreamableHTTPClientTransport with your Vinkius endpoint URL. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com.
3

Discover and use tools

Call mcpClient.tools() to auto-discover all WhatsApp Message Sender tools. Pass them directly to generateText() or streamText() — no manual schema definitions needed.
4

Works with any model provider

Swap openai("gpt-4o") for any AI SDK provider — Anthropic, Google, Mistral. The MCP tools work identically across all supported models.

index.ts

import { experimental_createMCPClient as createMCPClient } from "ai";
import { StreamableHTTPClientTransport } from "@modelcontextprotocol/sdk/client/streamableHttp";
import { generateText } from "ai";
import { openai } from "@ai-sdk/openai";

const transport = new StreamableHTTPClientTransport(
  new URL("https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp")
);

const mcpClient = await createMCPClient({ transport });
const tools = await mcpClient.tools();

const { text } = await generateText({
  model: openai("gpt-4o"),
  tools,
  prompt: "List recent WhatsApp Message Sender transactions",
});

console.log(text);
await mcpClient.close();

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Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by WhatsApp Cloud API. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

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Common questions about WhatsApp Message Sender MCP in Vercel AI SDK

It sends text messages using the Meta Cloud API. Your agent calls the `send_whatsapp_message` tool, and you receive a streamed response that confirms the message was sent successfully. The data appears live in your app.

The `send_whatsapp_message` tool requires the destination phone number to be provided in E.164 format, without any plus signs. You'll need this specific structure for the 'to' parameter.

The tool sends text messages through the official Meta API, but keep in mind that sending to users outside the 24-hour service window requires pre-approved templates on the Meta side. Otherwise, the message might fail.

The server touches phone numbers and text bodies. You are responsible for ensuring your agent handles this Personal Identifiable Information (PII) securely before calling the `send_whatsapp_message` tool.

The limits are dictated by your Meta API account and usage tier, not by the MCP Server itself. Always check your developer dashboard for rate limits.

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