𝗕𝘂𝗶𝗹𝗱 𝗔 𝗧𝗶𝗻𝘆 𝗠𝗖𝗣 𝗦𝗲𝗿𝘃𝗲𝗿 𝗜𝗻 𝗝𝗮𝘃𝗮𝗦𝗰𝗿𝗶𝗽𝘁

𝗕𝘂𝗶𝗹𝗱 𝗔 𝗧𝗶𝗻𝘆 𝗠𝗖𝗣 𝗦𝗲𝗿𝘃𝗲𝗿 𝗜𝗻 𝗝𝗮𝘃𝗮𝗦𝗰𝗿𝗶𝗽𝘁

LLMs often hallucinate. You stop this with the Model Context Protocol (MCP). MCP lets models use real tools. Your models get live data from GitHub or databases.

Follow these steps to start:

• Use Node 18 or newer.
• Install @modelcontextprotocol/sdk and zod.
• Set type to module in your package.json.

Build your server:

• Create an McpServer instance.
• Define a tool with a name and description.
• Use zod to validate inputs.
• Connect using StdioServerTransport for local use.

Connect to your favorite AI:

• Claude Desktop: Add the server path to your config.
• Codex: Run the codex mcp add command.
• Gemini: Use HTTP transport for cloud setups.

Avoid these mistakes:

• Do not use deep imports. Use the .js extension.
• Use absolute paths in your config files.
• Store API keys in environment variables.
• Use node --trace-warnings to find import errors.

Source: https://dev.to/gaurav101/build-a-tiny-mcp-server-in-javascript-claude-codex-friendly-pbh Example code: https://github.com/gaurav101/ai-experiment Optional learning community: https://t.me/GyaanSetuAi