yagms

Yet Another Gmail MCP Server

Setup and Usage

Gmail MCP Server

The Gmail MCP server provides tools to interact with your Gmail account through the Model Context Protocol (MCP).

Prerequisites

1. Create OAuth credentials for Gmail API:
   • Go to Google Cloud Console
   • Create a new project or select an existing one
   • Enable the Gmail API
   • Create OAuth 2.0 credentials (Desktop application)
   • Download the credentials JSON file and save it as ~/.yagms-oauth.keys.json

Build this project

1. Install Bun.
2. Build the code

bun install
bun run build-gmail # It will emit ./dist/gmail.js

Authentication

Before using the Gmail MCP server, you need to authenticate with your Google account:

# Run the authentication flow
bun run dist/gmail.js auth

This will:

• Launch a browser window for you to sign in to your Google account
• Request permission to access your Gmail account
• Save the authentication credentials to ~/.yagms-credentials.json

Running the Server

After authentication, you can run the Gmail MCP server:

# Run the server
bun run src/gmail.ts

Configuration

You can customize the paths for OAuth keys and credentials using environment variables:

• GMAIL_OAUTH_PATH: Path to the OAuth keys file (default: ~/.yagms-oauth.keys.json)
• GMAIL_CREDENTIALS_PATH: Path to save the credentials (default: ~/.yagms-credentials.json)

Available Tools

The Gmail MCP server provides the following tools:

1. list-emails: Get emails from your inbox

   • Parameters:
     • senderEmail (optional): Filter by sender email
     • maxResults (optional, default: 10): Maximum number of emails to return
     • labelIds (optional, default: ["INBOX"]): Label IDs to filter by

2. get-email: Get a specific email by ID

   • Parameters:
     • emailId: The ID of the email to retrieve

3. search-emails: Search for emails using Gmail search syntax

   • Parameters:
     • query: Gmail search query (e.g., "from:example@gmail.com has:attachment")
     • maxResults (optional, default: 10): Maximum number of emails to return

4. get-labels: Get all Gmail labels

   • No parameters required

Example MCP Configuration

Add this to your MCP settings file:

{
  "mcpServers": {
    "gmail": {
      "command": "bun",
      "args": ["run", "/path/to/yagms/dist/gmail.js"],
      "env": {},
      "disabled": false,
      "autoApprove": []
    }
  }
}