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CaptainPhantasy
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mcp-builder

Convert MCP tool ideas into validated server packages with tool catalogs and test harnesses.

Updated Mar 14, 2026
Search Tags:#security#mcp#server#framework-agnostic#contract#tool-catalog
One-click install
npx skills add https://github.com/CaptainPhantasy/floyd-v5 --skill mcp-builder-captainphantasy
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: mcp-builder
Source: https://github.com/CaptainPhantasy/floyd-v5/tree/main/extensibility/skills/ai/mcp-builder
Command: npx skills add https://github.com/CaptainPhantasy/floyd-v5 --skill mcp-builder-captainphantasy

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

MCP teams often struggle to convert vague tool requirements into production-ready server packages with consistent safety and integration hooks. The MCP BUILDER provides a standardized workflow to generate complete, implementation-ready MCP server and tool bundles across Node, Rust, and Python runtimes.

Core Features & Use Cases

  • Outputs complete artifacts: tool catalog spec, transport plan, server blueprint, safety gate, test harness, and integration hooks.
  • Framework-agnostic support: Node, Rust, or Python—compatible with modern CLI runtimes.
  • Use cases include designing new MCP servers (Patch, Runner, Browser, Git), adding tools to existing servers, standardizing tool schemas and safety controls, wiring MCP into a CLI runtime, and creating shared tool contracts.

Quick Start

Provide a design brief and I will generate a complete MCP server package.

Frequently Asked Questions about mcp-builder

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

FAQPage Schema
How do I generate a production-ready MCP server from a tool idea?▼

To generate a production-ready MCP server, provide a design brief to define the tool's purpose. The system outputs a complete package including a tool catalog, transport plan, server blueprint, safety gate, test harness, and integration hooks.

Can I build MCP servers for Python, Node, and Rust runtimes?▼

Yes, you can build MCP servers for Python, Node, and Rust runtimes. The framework-agnostic generation process supports modern CLI runtimes and produces standardized server blueprints across these environments.

What is included in an MCP server package?▼

An MCP server package includes a tool catalog spec, transport plan, server blueprint, safety gate, test harness, and integration hooks. These deterministic, validated artifacts ensure consistent safety and integration wiring.

How do I standardize tool schemas and safety controls for an MCP server?▼

To standardize tool schemas and safety controls, the system applies a deterministic workflow that generates a structured tool catalog spec and a safety gate. This ensures consistent contract validation across server bundles.

What's the best way to add tools to an existing MCP server?▼

The best way to add tools to an existing MCP server is to provide an updated design brief. The system generates new tool catalog specs, safety gates, and integration hooks to seamlessly wire the new tools into the existing framework-agnostic runtime.

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