mcp-builder

Create MCP servers for Python FastMCP and TypeScript MCP SDK with Zod and Pydantic validation.

1|Updated Feb 11, 2026

Search Tags:#typescript #python #validation #sdk #mcp #tool-registration #mcp-server

Ready to run

npx skills add https://github.com/xiaoshuangLi/aibo --skill mcp-builder-xiaoshuangli

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: mcp-builder
Source: https://github.com/xiaoshuangLi/aibo/tree/main/skills/mcp-builder
Command: npx skills add https://github.com/xiaoshuangLi/aibo --skill mcp-builder-xiaoshuangli

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires mcp, anthropic, and includes scripts (resource) components.

What problem does it solve?

This skill helps developers build robust MCP servers that expose tools and resources so LLMs can safely and effectively interact with external APIs and services.

Core Features & Use Cases

End-to-end MCP server scaffolding for Python (FastMCP) and Node/TypeScript (MCP SDK)
Tool registration with input/output schemas using Zod and Pydantic
Error handling, pagination, and structured outputs to improve reliability
Reference implementations, best practices, and example use cases for rapid adoption
Guidance on resources, lifespans, and transport options for scalable MCP servers

Quick Start

Start by scaffolding a new MCP server using the mcp-builder templates and run it locally to expose a sample tool.

Frequently Asked Questions about mcp-builder

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I build an MCP server to connect LLMs to external APIs?▼

Build an MCP server by scaffolding with Python FastMCP or TypeScript MCP SDK, then register API client tools with input validation and structured outputs to enable LLM interaction.

What is tool registration in an MCP server?▼

Tool registration in an MCP server defines API endpoints using Zod or Pydantic schemas, ensuring LLMs can safely trigger external tools with validated inputs and structured outputs.

Does the MCP server framework support both Python and TypeScript?▼

Yes, the framework supports both Python FastMCP and TypeScript MCP SDK workflows, allowing developers to register tools, handle errors, and manage lifespans in either language.

How do I validate inputs for MCP tools using Pydantic and Zod?▼

Validate MCP tool inputs by defining schemas with Pydantic for Python FastMCP and Zod for TypeScript SDK servers, ensuring structured outputs and robust error handling.

What are the best practices for MCP server error handling and pagination?▼

MCP server best practices involve implementing robust error handling, structured outputs, and pagination within API clients to improve reliability during LLM interaction.

When do I need to configure lifespans and transport options for MCP servers?▼

Configure lifespans and transport options for MCP servers when scaling API client interactions, ensuring resources are managed efficiently across tool registrations and external service calls.