npm · gmail-workspace-mcp-server
$npx -y gmail-workspace-mcp-server@0.4.12 GMAIL_OAUTH_CLIENT_ID · secret — OAuth2 client ID from Google Cloud Console (for personal Gmail accounts).
GMAIL_OAUTH_CLIENT_SECRET · secret — OAuth2 client secret from Google Cloud Console.
GMAIL_OAUTH_REFRESH_TOKEN · secret — Refresh token from the OAuth2 setup script.
GMAIL_SERVICE_ACCOUNT_CLIENT_EMAIL — Service account email address (for Google Workspace).
GMAIL_SERVICE_ACCOUNT_PRIVATE_KEY · secret — Service account private key in PEM format (for Google Workspace).
GMAIL_IMPERSONATE_EMAIL — Email address to impersonate (required for service account mode).
GMAIL_ENABLED_TOOLGROUPS — Comma-separated list of tool groups to enable (readonly, readwrite, readwrite_external).