MCP Builder

Build Model Context Protocol servers that connect LLMs to any service — from databases to APIs to local tools — with type-safe handlers and automatic schema generation.

Features

• Scaffold Generator — Creates a complete MCP server project with tools, resources, and prompts
• Type-Safe Handlers — Generates fully typed tool handlers with input validation via Zod or Pydantic
• Auto Schema Generation — Produces JSON Schema definitions from your TypeScript or Python types
• Transport Support — Configures stdio, SSE, or HTTP transports with connection management
• Testing Harness — Includes test utilities for verifying tool behavior without a live LLM

Quick Start

claude skill install mcp-builder

Usage

# Create a new MCP server for a REST API
/mcp-builder create --name "github-mcp" --type fastmcp

# Add a new tool to an existing MCP server
/mcp-builder add-tool "search_issues" --params "query:string, repo:string"

How It Works

Scaffolds MCP server projects using either the FastMCP (Python) or MCP SDK (TypeScript) framework. Generates tool definitions with proper JSON Schema, input validation, and error handling. Includes configuration for Claude Desktop, VS Code, and other MCP-compatible clients.

Compatibility

Works with Claude Code, Codex, Gemini CLI, Cursor, Windsurf, and Aider.