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How to integrate Whatsapp MCP with Mastra AI

Connect Mastra AI to Whatsapp MCP. Send contact card to new lead, get business profile details for support, and more using natural language, with authentication handled for you.

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WhatsApp is a business messaging platform for secure, automated customer communication. It streamlines chat workflows and customer outreach using the WhatsApp Business API.

58 Tools1 Triggers

Introduction

This guide walks you through connecting Whatsapp to Mastra AI using the Composio tool router. By the end, you'll have a working Whatsapp agent that can send contact card to new lead, get business profile details for support, list all approved message templates through natural language commands.

This guide will help you understand how to give your Mastra AI agent real control over a Whatsapp account through Composio's Whatsapp MCP server.

Before we dive in, let's take a quick look at the key ideas and tools involved.

Also integrate Whatsapp with

Claude CodeCursorChatGPTClaude CoworkAntigravityOpenAI Agents SDKClaude Agent SDKGrok BotMuseCodexKimi CodeGrok BuildVS CodeOpenCodeOpenClawHermesAtomic AgentPiDeepSeek HarnessCLIGoogle ADKLangChainVercel AI SDKLlamaIndexCrewAIPydantic AIAutoGen

TL;DR

Here's what you'll learn:
  • Set up your environment so Mastra, OpenAI, and Composio work together
  • Create a Tool Router session in Composio that exposes Whatsapp tools
  • Connect Mastra's MCP client to the Composio generated MCP URL
  • Fetch Whatsapp tool definitions and attach them as a toolset
  • Build a Mastra agent that can reason, call tools, and return structured results
  • Run an interactive CLI where you can chat with your Whatsapp agent

What is Mastra AI?

Mastra AI is a TypeScript framework for building AI agents with tool support. It provides a clean API for creating agents that can use external services through MCP.

Key features include:

  • MCP Client: Built-in support for Model Context Protocol servers
  • Toolsets: Organize tools into logical groups
  • Step Callbacks: Monitor and debug agent execution
  • OpenAI Integration: Works with OpenAI models via @ai-sdk/openai

What is the Whatsapp MCP server, and what's possible with it?

The WhatsApp MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your WhatsApp account. It provides structured and secure access to your WhatsApp Business account settings, profiles, templates, flows, and phone configuration, so your agent can manage business details, register phone numbers, maintain templates, update flows, and review account settings on your behalf.

  • Business profile management: Have your agent update your business description, contact information, and other WhatsApp Business profile settings.
  • Phone number administration: Direct your agent to register or deregister a WhatsApp Business phone number and set its two-step verification PIN.
  • Message template management: Let the agent browse the template library and create or update templates for your WhatsApp Business account.
  • Flow and commerce configuration: Instruct your agent to review Flow assets, update Flow configurations, and check commerce settings for your business phone number.
  • Account oversight and access: Have your agent review owned or shared business accounts, inspect compliance and encryption details, manage assigned user access, and subscribe your application to account notifications.

What is the Composio tool router, and how does it fit here?

What is Composio SDK?

Composio's Composio SDK helps agents find the right tools for a task at runtime. You can plug in multiple toolkits (like Gmail, HubSpot, and GitHub), and the agent will identify the relevant app and action to complete multi-step workflows. This can reduce token usage and improve the reliability of tool calls. Read more here: Getting started with Composio SDK

The tool router generates a secure MCP URL that your agents can access to perform actions.

How the Composio SDK works

The Composio SDK follows a three-phase workflow:

  1. Discovery: Searches for tools matching your task and returns relevant toolkits with their details.
  2. Authentication: Checks for active connections. If missing, creates an auth config and returns a connection URL via Auth Link.
  3. Execution: Executes the action using the authenticated connection.

Step-by-step Guide

Step by step09 STEPS
1

Prerequisites

Before starting, make sure you have:
  • Node.js 18 or higher
  • A Composio account with an active API key
  • An OpenAI API key
  • Basic familiarity with TypeScript
2

Getting API Keys for OpenAI and Composio

OpenAI API Key
  • Go to the OpenAI dashboard and create an API key.
  • You need credits or a connected billing setup to use the models.
  • Store the key somewhere safe.
Composio API Key
  • Log in to the Composio dashboard.
  • Go to Settings and copy your API key.
  • This key lets your Mastra agent talk to Composio and reach Whatsapp through MCP.
3

Install dependencies

bash
npm install @composio/core @mastra/core @mastra/mcp @ai-sdk/openai dotenv

Install the required packages.

What's happening:

  • @composio/core is the Composio SDK for creating MCP sessions
  • @mastra/core provides the Agent class
  • @mastra/mcp is Mastra's MCP client
  • @ai-sdk/openai is the model wrapper for OpenAI
  • dotenv loads environment variables from .env
4

Set up environment variables

bash
COMPOSIO_API_KEY=your_composio_api_key_here
COMPOSIO_USER_ID=your_user_id_here
OPENAI_API_KEY=your_openai_api_key_here

Create a .env file in your project root.

What's happening:

  • COMPOSIO_API_KEY authenticates your requests to Composio
  • COMPOSIO_USER_ID tells Composio which user this session belongs to
  • OPENAI_API_KEY lets the Mastra agent call OpenAI models
5

Import libraries and validate environment

typescript
import "dotenv/config";
import { openai } from "@ai-sdk/openai";
import { Agent } from "@mastra/core/agent";
import { MCPClient } from "@mastra/mcp";
import { Composio } from "@composio/core";
import * as readline from "readline";

import type { AiMessageType } from "@mastra/core/agent";

const openaiAPIKey = process.env.OPENAI_API_KEY;
const composioAPIKey = process.env.COMPOSIO_API_KEY;
const composioUserID = process.env.COMPOSIO_USER_ID;

if (!openaiAPIKey) throw new Error("OPENAI_API_KEY is not set");
if (!composioAPIKey) throw new Error("COMPOSIO_API_KEY is not set");
if (!composioUserID) throw new Error("COMPOSIO_USER_ID is not set");

const composio = new Composio({
  apiKey: composioAPIKey as string,
});
What's happening:
  • dotenv/config auto loads your .env so process.env.* is available
  • openai gives you a Mastra compatible model wrapper
  • Agent is the Mastra agent that will call tools and produce answers
  • MCPClient connects Mastra to your Composio MCP server
  • Composio is used to create a Tool Router session
6

Create a Tool Router session for Whatsapp

typescript
async function main() {
  const session = await composio.create(
    composioUserID as string,
    {
      toolkits: ["whatsapp"],
    },
  );

  const composioMCPUrl = session.mcp.url;
  console.log("Whatsapp MCP URL:", composioMCPUrl);
What's happening:
  • create spins up a short-lived MCP HTTP endpoint for this user
  • The toolkits array contains "whatsapp" for Whatsapp access
  • session.mcp.url is the MCP URL that Mastra's MCPClient will connect to
7

Configure Mastra MCP client and fetch tools

typescript
const mcpClient = new MCPClient({
    id: composioUserID as string,
    servers: {
      nasdaq: {
        url: new URL(composioMCPUrl),
        requestInit: {
          headers: session.mcp.headers,
        },
      },
    },
    timeout: 30_000,
  });

console.log("Fetching MCP tools from Composio...");
const composioTools = await mcpClient.getTools();
console.log("Number of tools:", Object.keys(composioTools).length);
What's happening:
  • MCPClient takes an id for this client and a list of MCP servers
  • The headers property includes the x-api-key for authentication
  • getTools fetches the tool definitions exposed by the Whatsapp toolkit
8

Create the Mastra agent

typescript
const agent = new Agent({
    name: "whatsapp-mastra-agent",
    instructions: "You are an AI agent with Whatsapp tools via Composio.",
    model: "openai/gpt-5",
  });
What's happening:
  • Agent is the core Mastra agent
  • name is just an identifier for logging and debugging
  • instructions guide the agent to use tools instead of only answering in natural language
  • model uses openai("gpt-5") to configure the underlying LLM
9

Set up interactive chat interface

typescript
let messages: AiMessageType[] = [];

console.log("Chat started! Type 'exit' or 'quit' to end.\n");

const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout,
  prompt: "> ",
});

rl.prompt();

rl.on("line", async (userInput: string) => {
  const trimmedInput = userInput.trim();

  if (["exit", "quit", "bye"].includes(trimmedInput.toLowerCase())) {
    console.log("\nGoodbye!");
    rl.close();
    process.exit(0);
  }

  if (!trimmedInput) {
    rl.prompt();
    return;
  }

  messages.push({
    id: crypto.randomUUID(),
    role: "user",
    content: trimmedInput,
  });

  console.log("\nAgent is thinking...\n");

  try {
    const response = await agent.generate(messages, {
      toolsets: {
        whatsapp: composioTools,
      },
      maxSteps: 8,
    });

    const { text } = response;

    if (text && text.trim().length > 0) {
      console.log(`Agent: ${text}\n`);
        messages.push({
          id: crypto.randomUUID(),
          role: "assistant",
          content: text,
        });
      }
    } catch (error) {
      console.error("\nError:", error);
    }

    rl.prompt();
  });

  rl.on("close", async () => {
    console.log("\nSession ended.");
    await mcpClient.disconnect();
    process.exit(0);
  });
}

main().catch((err) => {
  console.error("Fatal error:", err);
  process.exit(1);
});
What's happening:
  • messages keeps the full conversation history in Mastra's expected format
  • agent.generate runs the agent with conversation history and Whatsapp toolsets
  • maxSteps limits how many tool calls the agent can take in a single run
  • onStepFinish is a hook that prints intermediate steps for debugging

Complete Code

Here's the complete code to get you started with Whatsapp and Mastra AI:

typescript
import "dotenv/config";
import { openai } from "@ai-sdk/openai";
import { Agent } from "@mastra/core/agent";
import { MCPClient } from "@mastra/mcp";
import { Composio } from "@composio/core";
import * as readline from "readline";

import type { AiMessageType } from "@mastra/core/agent";

const openaiAPIKey = process.env.OPENAI_API_KEY;
const composioAPIKey = process.env.COMPOSIO_API_KEY;
const composioUserID = process.env.COMPOSIO_USER_ID;

if (!openaiAPIKey) throw new Error("OPENAI_API_KEY is not set");
if (!composioAPIKey) throw new Error("COMPOSIO_API_KEY is not set");
if (!composioUserID) throw new Error("COMPOSIO_USER_ID is not set");

const composio = new Composio({ apiKey: composioAPIKey as string });

async function main() {
  const session = await composio.create(composioUserID as string, {
    toolkits: ["whatsapp"],
  });

  const composioMCPUrl = session.mcp.url;

  const mcpClient = new MCPClient({
    id: composioUserID as string,
    servers: {
      whatsapp: {
        url: new URL(composioMCPUrl),
        requestInit: {
          headers: session.mcp.headers,
        },
      },
    },
    timeout: 30_000,
  });

  const composioTools = await mcpClient.getTools();

  const agent = new Agent({
    name: "whatsapp-mastra-agent",
    instructions: "You are an AI agent with Whatsapp tools via Composio.",
    model: "openai/gpt-5",
  });

  let messages: AiMessageType[] = [];

  const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout,
    prompt: "> ",
  });

  rl.prompt();

  rl.on("line", async (input: string) => {
    const trimmed = input.trim();
    if (["exit", "quit"].includes(trimmed.toLowerCase())) {
      rl.close();
      return;
    }

    messages.push({ id: crypto.randomUUID(), role: "user", content: trimmed });

    const { text } = await agent.generate(messages, {
      toolsets: { whatsapp: composioTools },
      maxSteps: 8,
    });

    if (text) {
      console.log(`Agent: ${text}\n`);
      messages.push({ id: crypto.randomUUID(), role: "assistant", content: text });
    }

    rl.prompt();
  });

  rl.on("close", async () => {
    await mcpClient.disconnect();
    process.exit(0);
  });
}

main();

Conclusion

You've built a Mastra AI agent that can interact with Whatsapp through Composio's Tool Router. You can extend this further by:
  • Adding other toolkits like Gmail, Slack, or GitHub
  • Building a web-based chat interface around this agent
  • Using multiple MCP endpoints to enable cross-app workflows
TOOLS & TRIGGERS

Supported Tools and Triggers

Every Whatsapp action and event your agent gets out of the box.

Block WhatsApp Users

Block one or more WhatsApp users to prevent them from sending messages to your business phone number.

Configure WhatsApp Conversational Automation

Configure conversational automation settings for a WhatsApp Business phone number.

Create WhatsApp Flow

Create a new WhatsApp Flow for the WhatsApp Business Account.

Create WhatsApp Max Price Agreement

Create a max price agreement for WhatsApp marketing messages pricing.

Create message template

Create a new message template for the WhatsApp Business Account.

Create QR Code

Create a new QR code with a prefilled message for a WhatsApp Business phone number.

Create upload session for WhatsApp

Create a resumable upload session for large file uploads to WhatsApp.

Delete WhatsApp Media

Delete a WhatsApp media file previously uploaded via the Media API.

Delete message template

Delete a message template from the WhatsApp Business Account by name.

Delete QR Code

Delete a specific QR code from a WhatsApp Business phone number.

Deregister WhatsApp Business Phone Number

Deregister a WhatsApp Business phone number from the Cloud API.

Get WhatsApp Business Account Activities

Retrieve activity history for a WhatsApp Business Account.

Get WhatsApp Business Account Details

Retrieve comprehensive details about a WhatsApp Business Account (WABA).

Get WhatsApp Business Compliance Info

Retrieve comprehensive business compliance information for a WhatsApp Business phone number.

Get Business Encryption

Retrieve the WhatsApp Business public key and its signature verification status.

Get business profile

Get the business profile information for a WhatsApp Business phone number.

Get client WhatsApp Business Accounts

Retrieve WhatsApp Business Accounts shared with or managed by a business portfolio.

Get WhatsApp Commerce Settings

Get commerce settings for a WhatsApp Business phone number.

Get Flow Assets

List assets associated with a WhatsApp Flow.

Get Join Requests

Get all pending join requests for a WhatsApp group.

Get media info

Get metadata and download URL for uploaded WhatsApp media.

Get WhatsApp Message History

Retrieve message history for a WhatsApp Business phone number.

Get message templates

Get all message templates for the WhatsApp Business Account.

Get owned WhatsApp Business Accounts

Retrieve WhatsApp Business Accounts owned by a business portfolio.

Get phone number

Retrieve detailed information about a specific WhatsApp Business phone number.

Get phone numbers

Retrieve all phone numbers registered to your WhatsApp Business Account.

Get WhatsApp Schedules

Retrieve campaign schedules associated with a WhatsApp Business Account.

Get WhatsApp Cloud API Settings

Get Cloud API settings for a WhatsApp Business phone number.

Get Subscribed Apps

Get all applications currently subscribed to webhooks for a WhatsApp Business Account.

Get message template library

Browse the pre-built message template library for WhatsApp Business Account.

Get template status

Get the status and details of a specific message template.

List WhatsApp Flows

List all WhatsApp Flows associated with the WhatsApp Business Account.

List WhatsApp Groups

List all WhatsApp groups associated with a business phone number.

List qr codes

Get a list of all QR codes for a WhatsApp Business phone number.

List WhatsApp Solutions

Retrieve a paginated list of Multi-Partner Solutions for a WhatsApp Business Account.

Publish WhatsApp Flow

Publish a WhatsApp Flow to make it available for use.

Register WhatsApp Business Phone Number

Register a WhatsApp Business phone number for use with WhatsApp Cloud API.

Remove Assigned User from WhatsApp Business Account

Remove a user's access from the WhatsApp Business Account.

Send contacts

Send contacts WhatsApp number.

Send interactive buttons

Send an interactive button message with up to 3 reply buttons to a WhatsApp user.

Send interactive list

Send an interactive list message to a WhatsApp number.

Send location

Send a location message with coordinates, name, and address to a WhatsApp user.

Send media

Send a media message to a WhatsApp number.

Send media by

Send media using a media ID from previously uploaded media.

Send message

Send a text message to a WhatsApp user.

Send template message

Send a template message to a WhatsApp number.

Set WhatsApp Two-Step Verification PIN

Set or reset the two-step verification PIN for a WhatsApp Business phone number.

Subscribe to WABA Webhooks

Subscribe your application to receive webhook notifications for a WhatsApp Business Account (WABA).

Unsubscribe from WABA Webhooks

Unsubscribe your application from webhook events for a WhatsApp Business Account (WABA).

Update WhatsApp Flow Metadata

Update metadata for a WhatsApp Flow including its name, categories, and endpoint URI.

Update WhatsApp Business Profile

Update WhatsApp Business Profile information including business details, contact information, and profile settings.

Update WhatsApp commerce settings

Set or update commerce settings for a WhatsApp Business phone number.

Update Flow JSON

Update the Flow JSON configuration for a WhatsApp Flow.

Update WhatsApp Cloud API Settings

Update Cloud API settings for a WhatsApp Business phone number.

Upload media

Upload media files (images, videos, audio, documents, stickers) to WhatsApp servers.

Upsert message template

Create or update a message template for the WhatsApp Business Account.

Verify Phone Number OTP Code

Verify the OTP code for a pre-verified phone number.

Who Am I

Return the identity (name) of the connected WhatsApp (Meta) account.

FRAMEWORKS

How to build Whatsapp MCP Agent with another framework

Claude Code logo

Claude Code

Use Whatsapp MCP with Claude Code

Cursor logo

Cursor

Use Whatsapp MCP with Cursor

ChatGPT logo

ChatGPT

Use Whatsapp MCP with ChatGPT

Claude Cowork logo

Claude Cowork

Use Whatsapp MCP with Claude Cowork

Antigravity logo

Antigravity

Use Whatsapp MCP with Antigravity

OpenAI Agents SDK logo

OpenAI Agents SDK

Use Whatsapp MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use Whatsapp MCP with Claude Agent SDK

Grok Bot logo

Grok Bot

Use Whatsapp MCP with Grok Bot

Muse logo

Muse

Use Whatsapp MCP with Muse

Codex logo

Codex

Use Whatsapp MCP with Codex

Kimi Code logo

Kimi Code

Use Whatsapp MCP with Kimi Code

Grok Build logo

Grok Build

Use Whatsapp MCP with Grok Build

VS Code logo

VS Code

Use Whatsapp MCP with VS Code

OpenCode logo

OpenCode

Use Whatsapp MCP with OpenCode

OpenClaw logo

OpenClaw

Use Whatsapp MCP with OpenClaw

Hermes logo

Hermes

Use Whatsapp MCP with Hermes

Atomic Agent logo

Atomic Agent

Use Whatsapp MCP with Atomic Agent

Pi logo

Pi

Use Whatsapp MCP with Pi

DeepSeek Harness logo

DeepSeek Harness

Use Whatsapp MCP with DeepSeek Harness

CLI logo

CLI

Use Whatsapp MCP with CLI

Google ADK logo

Google ADK

Use Whatsapp MCP with Google ADK

LangChain logo

LangChain

Use Whatsapp MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Whatsapp MCP with Vercel AI SDK

LlamaIndex logo

LlamaIndex

Use Whatsapp MCP with LlamaIndex

CrewAI logo

CrewAI

Use Whatsapp MCP with CrewAI

Pydantic AI logo

Pydantic AI

Use Whatsapp MCP with Pydantic AI

AutoGen logo

AutoGen

Use Whatsapp MCP with AutoGen

FAQ

Frequently asked questions

With a standalone Whatsapp MCP server, the agents and LLMs can only access a fixed set of Whatsapp tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Whatsapp and many other apps based on the task at hand, all through a single MCP endpoint.

Yes, you can. Mastra AI fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Whatsapp tools.

Yes, absolutely. You can configure which Whatsapp scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Whatsapp data and credentials are handled as safely as possible.

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