What is the primary benefit of using MCP Tool Manager?

It allows Claude to continue development by using simulated 'mock' tools when real external APIs are unavailable, rate-limited, or costly to use during the testing phase.

Is this compatible with any external service?

It is compatible with any service that can be described via the Model Context Protocol (MCP), including Stripe, AWS, SendGrid, and custom internal APIs.

How do I switch from mock to live mode?

You can toggle the environment by setting the RALPH_MCP_MODE environment variable to 'live' or 'mock' before running your development scripts.

Can it handle APIs without existing mocks?

Yes, the skill includes a workflow to auto-generate mock MCP tools directly from OpenAPI specifications provided in your project repository.

MCP Tool Manager

Name: MCP Tool Manager
Author: kimhons

bykimhons

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API Development

Manages transitions between live and mocked external API dependencies using the Model Context Protocol to ensure resilient autonomous development.

The MCP Tool Manager is a specialized Claude Code skill designed to streamline how AI agents interact with external services like Stripe, AWS, or Twilio. By defining both live and mock configurations within the Model Context Protocol (MCP) framework, it allows developers to toggle between production-level integrations and local simulations via environment variables. This prevents rate-limiting issues, reduces costs during development, and enables Claude to generate mock tools automatically from OpenAPI specifications, ensuring that development never stalls due to unavailable or complex external APIs.

Key Features

01Automatic mock tool generation from OpenAPI specifications

02Dynamic tool selection via environment variables

03Standardized MCP configuration patterns for project-wide consistency

041 GitHub stars

05Seamless integration with autonomous development loops

06Environment-based switching between live and mock API toolsets

Use Cases

01Simulating paid API services during local development to avoid unnecessary costs

02Developing features autonomously when API credentials or internet access are restricted

03Testing error handling and edge cases using controlled mock responses

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add kimhons/ralph-loop-ultra mcp-tool-manager

For use in Claude.ai and ChatGPT

Download Skill