Authenticator App MCP Server

import { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js'; import { Authenticator } from './authenticator.js'; import { Logger } from './index.js'; import { z } from 'zod'; import { Transport } from '@modelcontextprotocol/sdk/shared/transport.js'; const serverInfo = { name: 'Authenticator App MCP', version: '1.0.0', }; const serverOptions = { capabilities: { logging: {}, tools: {} }, }; export class AuthenticatorMcpServer extends McpServer { private readonly authenticator: Authenticator; constructor(accessToken: string) { super(serverInfo, serverOptions); this.authenticator = new Authenticator(accessToken); this.registerTools(); } private registerTools(): void { this.tool( 'get_2fa_code', 'Retrieve the current 2FA code for a username when logging into a website.', { website: z .string() .describe('The domain name of the website you need to login, e.g. "github.com"'), username: z .string() .describe( 'The username or email of the account you need to login, e.g. "john.doe@example.com"' ), }, async ({ website, username }, extra) => { const res = await this.authenticator.get2FACode(website, username); return { content: [ { type: 'text', text: `The 2FA code is ${res.code}, it will expire in ${res.valid_for} seconds.`, }, ], }; } ); this.tool( 'get_password', 'Retrieve the password for a username when logging into a website.', { website: z .string() .describe('The domain name of the website you need to login, e.g. "github.com"'), username: z .string() .describe( 'The username or email of the account you need to login, e.g. "john.doe@example.com"' ), }, async ({ website, username }, extra) => { const res = await this.authenticator.getPassword(website, username); return { content: [ { type: 'text', text: `The password is ${res.password}.`, }, ], }; } ); this.tool( 'get_account_list', 'Retrieve the accounts can be used when logging into a website.', { website: z .string() .describe('The domain name of the website you need to login, e.g. "github.com"'), }, async ({ website }, extra) => { const res = await this.authenticator.getAccountList(website); return { content: [ { type: 'text', text: `The accounts are: ${res.accounts.join(', ')}.`, }, ], }; } ); } async connect(transport: Transport): Promise<void> { await super.connect(transport); // Ensure stdout is only used for JSON messages const originalStdoutWrite = process.stdout.write.bind(process.stdout); process.stdout.write = (chunk: any, encoding?: any, callback?: any) => { // Only allow JSON messages to pass through if (typeof chunk === 'string' && !chunk.startsWith('{')) { return true; // Silently skip non-JSON messages } return originalStdoutWrite(chunk, encoding, callback); }; Logger.log('Server connected and ready to process requests'); } }