Unlimited Messaging

Send and read WhatsApp, email and SMS from Claude, ChatGPT or any MCP client, using your own WhatsApp number, mailbox and Android phone. Hosted, OAuth, free plan with unlimited messages.

View on unlimitedmessaging.app

Hosted MCP Server

npx add-mcp 'https://api.unlimitedmessaging.app/mcp'

Installs into Claude Code, Codex, Cursor and more

Documentation

MCP: connect your AI in one command | UnlimitedMessaging

One command for Claude Code, a connector for Claude.ai and ChatGPT, a config block for Cursor. Then ask your AI to send WhatsApp, email and SMS.

Source: https://unlimitedmessaging.app/mcp

MCP · Claude, ChatGPT, Cursor

Connect your AI

in one command.

Add Unlimited Messaging to your assistant, sign in, then ask it in plain words to link your WhatsApp or your mailbox and send your messages by WhatsApp, email or SMS.

Pick my assistantCreate a free account

Step 1

One command or one connector, depending on your AI

The same server for every assistant. No API key to copy: sign-in goes through OAuth.

  • Claude Code

In your terminal, a single command:
Shell
claude mcp add --transport http unlimited-messaging https://mcp.unlimitedmessaging.app

  • Claude.ai and Claude Desktop

In the connector settings, add a custom connector and paste this URL:
MCP server URL
https://mcp.unlimitedmessaging.app
The step-by-step Claude guide

  • ChatGPT

In the connector settings, create a custom connector with this URL:
MCP server URL
https://mcp.unlimitedmessaging.app
The step-by-step ChatGPT guide

  • Cursor

Add this block to your ~/.cursor/mcp.json file:
mcp.json
{
"mcpServers": {
"unlimited-messaging": {
"url": "https://mcp.unlimitedmessaging.app"
}
}
}

Step 2

Your AI opens the sign-in, you approve

On the first call, your assistant sends you to the Unlimited Messaging sign-in page.

  1. 01

Sign in

No account yet? Create it in the same step, with Google, GitHub or your email address. 2. 02

Approve access

You see what the assistant will be able to do, and you approve. No key to copy or store. 3. 03

Just ask

Your AI now has the Unlimited Messaging tools. Talk to it like an assistant.

Step 3

Then just ask

Four requests to get started. The assistant picks the right tool and shows you the result.

  • Connect my WhatsApp

    tool · add-account
    The assistant shows the QR code: scan it from WhatsApp, Linked devices.
  • Connect my mailbox

    tool · add-email-account
    Give your address and an app password, the IMAP/SMTP settings are detected.
  • Send a message to Lea: the meeting moves to 3 pm

    tool · send-message
    The assistant shows you the message, you confirm, it goes out from your account.
  • List my latest messages

    tool · list-messages
    WhatsApp, email and SMS, with the sender, channel and status of each message.

Go further

For developers

A code project? Paste this prompt

In Claude Code, Cursor or ChatGPT open on your project, this prompt installs the SDK, reads your key from UM_API_KEY and sends a test message.

Prompt to copy

Add Unlimited Messaging to this project so it can send WhatsApp, email and SMS messages.

  1. Detect the project language. For TypeScript or JavaScript, run npm i @unlimited-messaging/sdk. For Python, run pip install unlimited-messaging.
  2. Read the API key from the UM_API_KEY environment variable: add it to .env and .env.example, never hardcode it. I create the key at https://app.unlimitedmessaging.app.
  3. Create a small module that sends a message with the SDK (API: https://api.unlimitedmessaging.app), then a script that sends a test WhatsApp message. TypeScript: new UnlimitedMessagingApiClient({ token }) then client.messages.messageSend({ recipient, text }). Python: UnlimitedMessagingApi(token=...) then client.messages.message_send(recipient=..., text=...).
  4. Follow the official docs for the exact method names: https://docs.unlimitedmessaging.app

Ask me for the recipient number before running the test.

FAQ

Frequently asked questions about MCP

Any assistant that accepts a remote MCP server: Claude Code, Claude.ai, Claude Desktop, ChatGPT and Cursor, among others. The URL is the same for all of them.

No. Sign-in goes through OAuth: your assistant opens the sign-in page, you approve access, and that is it.

WhatsApp from your number, email from your own mailbox and SMS from your Android phone, depending on the accounts you have linked.

The server asks the assistant to have you confirm every send before it goes out.

Yes. The MCP server is included in every plan, including the free plan, with no credit card.

Ready to plug in your AI?

Add the MCP server to your assistant and send your first message in plain words.

Start for free→Read the MCP guide