my own MCP server

Author: paulirish

.prettierrc.js

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+log.log

personal_mcp/.gitignore

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+import {McpServer} from '@modelcontextprotocol/sdk/server/mcp.js';
+import {StdioServerTransport} from '@modelcontextprotocol/sdk/server/stdio.js';
+import fs from 'node:fs';
+import debug from 'debug';
+import * as Tools from './tools.ts';
+import * as Prompts from './prompts.ts';
+
+if (process.env.DEBUG_FILE) {
+  const logFile = fs.createWriteStream(process.env.DEBUG_FILE, {flags: 'a'});
+  debug.log = function (chunk) {
+    logFile.write(`${chunk}\n`);
+  };
+  logFile.on('error', function (error) {
+    console.log(`Error when opening/writing to log file: ${error.message}`);
+    logFile.end();
+    process.exit(1);
+  });
+}
+export const logger = debug('personal_mcp:log');
+
+const server = new McpServer(
+  {
+    name: 'Paul MCP Server',
+    version: '0.1.0',
+  },
+  {capabilities: {logging: {}}}
+);
+
+server.tool(
+  'hello',
+  'Says hello',
+  Tools.helloSchema.shape,
+  // {
+  //   title: 'Personal MCP: Hello',
+  // },
+  Tools.hello
+);
+
+// Gemini CLI doesn't seem to use prompts yet. :/
+server.prompt('reword-as-me', 'Reword it like me', Prompts.rewordItLikeMeSchema.shape, Prompts.rewordItLikeMe);
+
+const transport = new StdioServerTransport();
+await server.connect(transport);
+logger('Paul MCP Server connected');

personal_mcp/index.ts

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+{
+  "name": "personal_mcp",
+  "version": "1.0.0",
+  "type": "module",
+  "main": "index.js",
+  "scripts": {
+    "test": "node --test",
+    "start": "ts-node index.ts"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "description": "",
+  "devDependencies": {
+    "@types/node": "^24.1.0",
+    "ts-node": "^10.9.2",
+    "typescript": "^5.8.3"
+  },
+  "dependencies": {
+    "@modelcontextprotocol/sdk": "^1.17.0",
+    "debug": "^4.4.1",
+    "zod": "^3.25.76",
+    "zod-to-json-schema": "^3.24.1"
+  }
+}