Gmail MCP MCP Server

io.github.A1-x-Tech/mcp-google-gmail

Repository Registry

What is the Gmail MCP MCP server?

MCP server for the Gmail API: search, read and send email, manage drafts, labels and the trash.

How to install Gmail MCP

Copy-paste configuration for popular MCP clients.

transport: stdio

Config generated by PluginBench — verify against the source before use.

Environment / auth

GOOGLE_GMAIL_CLIENT_ID
Google OAuth2 client id (refresh-token flow).
GOOGLE_GMAIL_CLIENT_SECRET
secret
Google OAuth2 client secret (refresh-token flow). Treat it as a secret.
GOOGLE_GMAIL_REFRESH_TOKEN
secret
Google OAuth2 refresh token, exchanged for access tokens automatically. Treat it as a secret.
GOOGLE_GMAIL_ACCESS_TOKEN
secret
Static OAuth2 access token (~1h lifetime) — alternative to the refresh-token trio, mostly for testing.
GOOGLE_GMAIL_OAUTH_PORT
Fixed port for the loopback listener of the in-chat login (127.0.0.1 + PKCE). Set it when the client runs over SSH port forwarding; otherwise a free port is picked per login.
GOOGLE_GMAIL_API_BASE
API root override.
GOOGLE_GMAIL_TIMEOUT_MS
Per-request timeout in milliseconds.
GOOGLE_GMAIL_MAX_RETRIES
Retries on transient errors (429 always; 5xx/network for reads).

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "mcp-google-gmail": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-google-gmail"
      ],
      "env": {
        "GOOGLE_GMAIL_CLIENT_ID": "<YOUR_GOOGLE_GMAIL_CLIENT_ID>",
        "GOOGLE_GMAIL_CLIENT_SECRET": "<YOUR_GOOGLE_GMAIL_CLIENT_SECRET>",
        "GOOGLE_GMAIL_REFRESH_TOKEN": "<YOUR_GOOGLE_GMAIL_REFRESH_TOKEN>",
        "GOOGLE_GMAIL_ACCESS_TOKEN": "<YOUR_GOOGLE_GMAIL_ACCESS_TOKEN>",
        "GOOGLE_GMAIL_OAUTH_PORT": "<YOUR_GOOGLE_GMAIL_OAUTH_PORT>",
        "GOOGLE_GMAIL_API_BASE": "<YOUR_GOOGLE_GMAIL_API_BASE>",
        "GOOGLE_GMAIL_TIMEOUT_MS": "<YOUR_GOOGLE_GMAIL_TIMEOUT_MS>",
        "GOOGLE_GMAIL_MAX_RETRIES": "<YOUR_GOOGLE_GMAIL_MAX_RETRIES>"
      }
    }
  }
}

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