Gmail MCP Server

import {z} from 'zod'; import type {McpServer} from '@modelcontextprotocol/sdk/server/mcp.js'; import type {Config} from './types.js'; import {makeGmailApiCall} from '../utils/gmail-api.js'; import {jsonResult} from '../utils/response.js'; const inputSchema = { id: z.string().describe('The ID of the message to modify'), addLabelIds: z.array(z.string()).optional().describe('Label IDs to add to the message'), removeLabelIds: z.array(z.string()).optional().describe('Label IDs to remove from the message'), }; const outputSchema = z.object({ id: z.string(), threadId: z.string(), labelIds: z.array(z.string()).optional(), }); export function registerMessageModify(server: McpServer, config: Config): void { server.registerTool( 'message_modify', { title: 'Modify message labels', description: 'Modify the labels on a message. Use this to archive (remove INBOX), mark as read (remove UNREAD), star, etc.', inputSchema, outputSchema, }, async ({id, addLabelIds, removeLabelIds}) => { const requestBody: {addLabelIds?: string[]; removeLabelIds?: string[]} = {}; if (addLabelIds?.length) { requestBody.addLabelIds = addLabelIds; } if (removeLabelIds?.length) { requestBody.removeLabelIds = removeLabelIds; } const result = await makeGmailApiCall('POST', `/users/me/messages/${id}/modify`, config.token, requestBody); return jsonResult(outputSchema.parse(result)); }, ); }