The Model Context Protocol (MCP) is the open standard that lets AI assistants like Claude securely access local files, databases, APIs, and development tools. Instead of copying and pasting context, your AI can directly interact with your environment.
What is MCP?
MCP defines a client-server architecture where an AI host (like Claude Desktop) connects to MCP servers that expose resources and tools. Think of it as a USB-C for AI connectivity — a universal protocol replacing dozens of custom integrations.
Setting Up Your First MCP Server
Install the MCP SDK and create a simple server that exposes your project’s file system:
npm install @modelcontextprotocol/sdk
# File server example
import { Server } from '@modelcontextprotocol/sdk';
const server = new Server({
name: "local-fs-server",
version: "1.0.0"
});
server.tool("read_file", async ({ path }) => {
return { content: await fs.readFile(path, "utf-8") };
});
server.start();
Configuring Claude Desktop
Add your MCP server to Claude Desktop’s configuration file (claude_desktop_config.json):
{
"mcpServers": {
"local-fs": {
"command": "node",
"args": ["path/to/fs-server.js"]
},
"github": {
"command": "npx",
"args": ["@modelcontextprotocol/server-github"]
}
}
}
“MCP transforms AI from a chat interface into an active development partner that can read your codebase, query your database, and push to GitHub — all with your explicit permission.”
Popular MCP Servers
The MCP ecosystem has grown rapidly. Key servers include: GitHub (manage repos, PRs, issues), Postgres (query databases), Filesystem (read/write local files with permission boundaries), Brave Search (web search), and Puppeteer (headless browser automation).
Security Considerations
MCP servers run locally and respect your machine’s permissions. Always audit server configurations before granting file or network access. Use the permissions feature in Claude Desktop to approve or deny individual tool calls.
Building Custom MCP Servers
Build servers for your proprietary tools or internal APIs. The TypeScript SDK provides type-safe abstractions for resources, tools, and prompts. Deploy servers as npm packages or standalone binaries.