Google Chat MCP Server

A Model Context Protocol (MCP) server implementation for interacting with the Google Chat API via webhooks. This server provides a simple tool for posting text messages to Google Chat spaces.

Features

• Post text messages to Google Chat spaces using webhooks
• Simple and secure webhook-based integration
• No OAuth setup required
• Easy to use with MCP-compatible tools

Installation

Using Smithery (Recommended)

Install the server using Smithery's CLI:

npx spinai-mcp install @KaranThink41/gchat_post_text_message --provider smithery

Local Development

1. Clone the repository:

git clone https://github.com/KaranThink41/google_chat_mcp_server.git
cd google_chat_mcp_server

2. Install dependencies:

npm install

3. Build the project:

npm run build

4. Run the server:

node build/index.js

Docker Setup

You can run the server using Docker. Here's how to set it up:

1. Build the Docker image:

docker build -t google-chat-mcp-server .

2. Run the Docker container with the necessary environment variables:

docker run -e GOOGLE_CHAT_SPACE_ID=your_space_id \
          -e GOOGLE_CHAT_API_KEY=your_api_key \
          -e GOOGLE_CHAT_TOKEN=your_token \
          google-chat-mcp-server

Usage Example

To post a message to Google Chat, send the following JSON request:

{
  "method": "tools/call",
  "params": {
    "name": "post_text_message",
    "arguments": {
      "space_id": "your_space_id",
      "key": "your_api_key",
      "token": "your_token",
      "text": "Hello, this is a test message!"
    }
  }
}

Configuration

The server requires the following environment variables to function:

• GOOGLE_CHAT_SPACE_ID: The Space ID of your Google Chat space
• GOOGLE_CHAT_API_KEY: The API key for your Google Cloud project
• GOOGLE_CHAT_TOKEN: The authentication token for Google Chat

These variables can be set in your environment or via Docker (as shown in the Docker Setup section).

To run locally without Docker, create a .env file with the following content:

GOOGLE_CHAT_SPACE_ID=your_space_id
GOOGLE_CHAT_API_KEY=your_api_key
GOOGLE_CHAT_TOKEN=your_token

Security

• Webhook URLs are passed directly in the request payload
• No sensitive credentials are stored in the code
• All requests are validated before execution

Contributing

1. Fork the repository
2. Create your feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add some amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

License

This project is licensed under the MIT License - see the LICENSE file for details.