Gmail MCP

Instructions

Implementation Reference

• src/index.ts:1299-1304 (handler)

  Handler function for the 'stop_mail_watch' tool. Authenticates via handleTool and calls Gmail API's users.stop to cease push notifications on the user's mailbox.
  async () => { return handleTool(config, async (gmail: gmail_v1.Gmail) => { const { data } = await gmail.users.stop({ userId: 'me' }) return formatResponse(data) }) }
• src/index.ts:1296-1305 (registration)

  Registration of the 'stop_mail_watch' MCP tool with empty input schema and inline handler implementation.
  server.tool("stop_mail_watch", "Stop receiving push notifications for the given user mailbox", {}, async () => { return handleTool(config, async (gmail: gmail_v1.Gmail) => { const { data } = await gmail.users.stop({ userId: 'me' }) return formatResponse(data) }) } )
• src/index.ts:1298-1298 (schema)

  Empty input schema for the 'stop_mail_watch' tool (no parameters required).
  {},
• src/index.ts:49-65 (helper)

  Shared helper function 'handleTool' used by stop_mail_watch (and other tools) for OAuth2 authentication, credential validation, Gmail client creation, and error handling.
  const handleTool = async (queryConfig: Record<string, any> | undefined, apiCall: (gmail: gmail_v1.Gmail) => Promise<any>) => { try { const oauth2Client = queryConfig ? createOAuth2Client(queryConfig) : defaultOAuth2Client if (!oauth2Client) throw new Error('OAuth2 client could not be created, please check your credentials') const credentialsAreValid = await validateCredentials(oauth2Client) if (!credentialsAreValid) throw new Error('OAuth2 credentials are invalid, please re-authenticate') const gmailClient = queryConfig ? google.gmail({ version: 'v1', auth: oauth2Client }) : defaultGmailClient if (!gmailClient) throw new Error('Gmail client could not be created, please check your credentials') const result = await apiCall(gmailClient) return result } catch (error: any) { return `Tool execution failed: ${error.message}` } }
• src/index.ts:47-47 (helper)

  Shared helper 'formatResponse' used to format the API response as MCP content.
  const formatResponse = (response: any) => ({ content: [{ type: "text", text: JSON.stringify(response) }] })