Build a Custom MCP Server to Give Claude Direct Access to Your Internal Tools

Out-of-the-box MCP servers cover common tools, but the real power comes from building servers tailored to your team's specific systems. A custom MCP server lets Claude query your internal database, check your deployment status, search your knowledge base, or interact with any internal API — all as first-class tools.

# Scaffold a new MCP server with the create-mcp-server tool
npx @anthropic-ai/create-mcp-server my-internal-tools
cd my-internal-tools

An MCP server exposes tools that Claude can call. Each tool is a function with a name, description, input schema, and handler:

server.tool("search-wiki", "Search the internal wiki", {
  query: { type: "string", description: "Search query" }
}, async ({ query }) => {
  const results = await wiki.search(query);
  return { content: [{ type: "text", text: JSON.stringify(results) }] };
});

Once registered, Claude sees this tool and can call it whenever relevant — "search the wiki for our rate limiting policy" just works.

Practical MCP servers your team could build:

Database explorer — read-only queries against staging data without SSH
Deploy status — check what's deployed where without opening a dashboard
Feature flags — list and toggle flags directly from Claude
Internal docs — search your Confluence, Notion, or wiki from the prompt
Monitoring — pull recent error counts, latency metrics, or alert status

claude mcp add --scope project my-tools -- node /path/to/server/index.js

Now every developer on the team gets these tools automatically when they work in the project.

For Laravel projects, the laravel/mcp package lets you build MCP servers that expose your Eloquent models, Artisan commands, and application context directly — Claude can query your database, read your logs, and search your docs without leaving the session.

The best MCP server is the one that connects Claude to the tools your team already uses — build it once and everyone benefits.

via Claude Code