mcp-builder

Guide developers through building MCP servers with typed tools and validation.

Updated Feb 17, 2026

Search Tags:#typescript #python #validation #mcp #server #tool-design

Ready to run

npx skills add https://github.com/prulloac/git-blame-vsc --skill mcp-builder-prulloac

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: mcp-builder
Source: https://github.com/prulloac/git-blame-vsc/tree/main/.agents/skills/mcp-builder
Command: npx skills add https://github.com/prulloac/git-blame-vsc --skill mcp-builder-prulloac

SYSTEM DOCUMENTATION & REQUIREMENTS

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

What problem does it solve?

Guides developers to create robust MCP servers and tooling, bridging LLMs with external services through well-designed tools.

Core Features & Use Cases

End-to-end MCP server development guidance for both Python (FastMCP) and TypeScript (MCP SDK).
Best-practice tool design, input validation with Pydantic/Zod, error handling, and testing strategies.
Step-by-step workflow from planning to evaluations, plus reference materials and quality checklists.

Quick Start

Compose a compliant MCP server by following the phases, implement tools with typed schemas, and verify readiness using the included evaluation references.

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 that connects LLMs to external services?▼

To build an MCP server, follow a guided workflow covering planning, implementation, and testing, using language-specific SDKs for TypeScript or Python to expose external service tools to LLMs.

What is the best way to design tools for an MCP server?▼

The best way to design MCP server tools is to use typed input validation with Zod or Pydantic, enforce structured tool outputs, and implement robust error handling to ensure reliable LLM interactions.

Does MCP server development support both Python and TypeScript?▼

Yes, MCP server development supports both Python and TypeScript, providing language-specific guidance for using FastMCP in Python and the MCP SDK in TypeScript.

How do I validate inputs and handle errors when building MCP tools?▼

Validate MCP tool inputs using typed schemas with Pydantic for Python or Zod for TypeScript, and handle errors by returning structured outputs that inform the LLM of execution failures.

What are the steps to test and evaluate an MCP server?▼

Testing an MCP server involves following a step-by-step workflow from implementation to evaluations, using included reference materials and quality checklists to verify tool readiness and reliability.