Janee
📇 🏠 🍎 🪟 🐧 - Self-evolving MCP server that generates and improves its own tools at runtime. Built on FastMCP, Janee uses LLM-driven tool generation to dynamically create, test, and refine MCP tools from natural language descriptions — enabling AI agen
What is Janee?
Janee is a Model Context Protocol (MCP) server that allows AI assistants like Claude, Cursor, and VS Code to 📇 🏠 🍎 🪟 🐧 - self-evolving mcp server that generates and improves its own tools at runtime. built on fastmcp, janee uses llm-driven tool generation to dynamically create, test, and refine mcp tool...
📇 🏠 🍎 🪟 🐧 - Self-evolving MCP server that generates and improves its own tools at runtime. Built on FastMCP, Janee uses LLM-driven tool generation to dynamically create, test, and refine MCP tools from natural language descriptions — enabling AI agen
This server falls under the Coding Agents category on MCPgee, the world's largest MCP server directory with 33,000+ servers.
Features
- 📇 🏠 🍎 🪟 🐧 - Self-evolving MCP server that generates and impr
Use Cases
Maintainer
Works with
Installation
NPM
npx -y @true-and-useful/janeeManual Installation
npx -y @true-and-useful/janeeConfiguration
Configuration Details
claude_desktop_config.json
Performance
Response Metrics
Resource Usage
How to Set Up and Use Janee
Janee is a self-evolving MCP server built on FastMCP that generates, tests, and refines its own tools at runtime using LLM-driven code generation. Instead of shipping a fixed set of tools, Janee lets AI agents describe what they need in natural language and then synthesises new MCP tools on the fly — all while keeping API credentials encrypted on disk so agents never see raw secrets. It is designed for developers who want an extensible, security-conscious tool proxy that grows with their agent workflows.
Prerequisites
- Node.js 18 or later
- npm or npx available on your PATH
- An MCP client such as Claude Desktop or Cursor
- API keys for any external services you want Janee to proxy (e.g. Stripe, GitHub, Twitter)
- An LLM API key for the tool-generation backend (configurable in janee config)
Install Janee globally
Install the Janee CLI from npm. The package name is @true-and-useful/janee.
npm install -g @true-and-useful/janeeInitialise the configuration
Run janee init to create the default configuration file at ~/.janee/config.yaml. This sets up the server host, default access policy, and an empty services map.
janee initAdd a service with its credentials
Use janee add to register an external API service. Credentials are encrypted at rest using AES-256 and stored in ~/.janee/config.yaml. Supported auth types include bearer, basic, github-app, twitter-oauth1, and aws-sigv4.
janee addConfigure your MCP client
Add Janee to your MCP client configuration so it is started automatically. The server exposes tools over stdio.
Start the Janee server
Run janee serve to start the MCP server. It will read ~/.janee/config.yaml and expose the configured services as MCP tools.
janee serveAsk your AI to generate a new tool
Once connected, describe a new capability to your AI client in natural language. Janee will use LLM-driven generation to synthesise a new MCP tool, test it, and make it available without a server restart.
Janee Examples
Client configuration
Claude Desktop configuration block to run Janee via npx without a global install.
{
"mcpServers": {
"janee": {
"command": "npx",
"args": ["-y", "@true-and-useful/janee"]
}
}
}Prompts to try
Example prompts to use once Janee is connected to your AI client.
- "List all services currently registered in Janee"
- "Execute a GET /v1/balance request through the stripe capability"
- "Create a new tool that fetches the top 5 trending GitHub repositories"
- "Reload the Janee config after I updated it"
- "Run the git status command using the exec tool"Troubleshooting Janee
janee command not found after install
Ensure npm's global bin directory is on your PATH. Run npm bin -g to find the directory and add it to your shell profile (e.g. export PATH="$(npm bin -g):$PATH").
Credentials are not being picked up by a service
Run janee add again for the service and verify the auth.type matches what the API expects (bearer, basic, github-app, etc.). Check ~/.janee/config.yaml to confirm the service entry exists with a services.[name].auth.key field.
Tool generation produces a tool that fails when called
Janee's LLM-driven generation may produce code that needs refinement. Provide more specific natural language descriptions of the expected input/output, or use the manage_credential tool to verify the underlying service credentials are correctly configured.
Frequently Asked Questions about Janee
What is Janee?
Janee is a Model Context Protocol (MCP) server that 📇 🏠 🍎 🪟 🐧 - self-evolving mcp server that generates and improves its own tools at runtime. built on fastmcp, janee uses llm-driven tool generation to dynamically create, test, and refine mcp tools from natural language descriptions — enabling ai agen It connects AI assistants to external tools and data sources through a standardized interface.
How do I install Janee?
Install via npm with the command: npx -y @true-and-useful/janee. Then add the server configuration to your AI client's JSON config file (e.g., claude_desktop_config.json or .cursor/mcp.json).
Which AI clients work with Janee?
Janee works with all major MCP-compatible AI clients including Claude Desktop, Claude Code, Cursor, VS Code (GitHub Copilot), Windsurf, and Cline.
Is Janee free to use?
Yes, Janee is open source and available under the MIT license. You can use it freely in both personal and commercial projects.
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Quick Config Preview
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