Frequently Asked Questions (FAQ) about JavaScript MCP Server

Q: What is an MCP Server? A: MCP (Model Context Protocol) server acts as a bridge, allowing AI models to access and interact with external data sources and tools. It standardizes how applications provide context to LLMs, enabling them to execute code, access data, and perform actions in a controlled environment.

Q: What is UBOS? A: UBOS is a Full-stack AI Agent Development Platform focused on bringing AI Agents to every business department. Our platform helps you orchestrate AI Agents, connect them with your enterprise data, build custom AI Agents with your LLM model, and create Multi-Agent Systems.

Q: What programming languages does the JavaScript MCP Server support? A: The server primarily supports JavaScript and TypeScript. TypeScript code is automatically transpiled to JavaScript before execution.

Q: What are the different operating modes of the server? A: The server supports three operating modes: Standard MCP Mode (communicates via stdio using MCP), Interactive Mode (provides a REPL interface), and Pipe Mode (uses named pipes for communication).

Q: How do I install NPM packages for use with the server? A: The server allows dynamic importing and use of NPM packages within the execution environment. You can use standard require() or import statements within your JavaScript code to access NPM packages.

Q: How do I maintain state across multiple interactions with the server? A: The server supports stateful REPL sessions, allowing you to store variables and function definitions for later use. You can create, execute in, list, and delete sessions using the available tools.

Q: What is the purpose of the ‘execute’ tool? A: The ‘execute’ tool runs JavaScript code once and returns the result. It’s suitable for one-time script executions without maintaining a persistent session.

Q: How can I use the interactive mode for debugging? A: Start the server with the --interactive flag. This provides a direct command-line REPL interface where you can type and execute JavaScript code in real-time.

Q: What is the architecture of the JavaScript MCP server? A: The server follows a layered architecture consisting of the MCP Protocol Layer, JavaScript Execution Layer, Resource Management Layer, and Session Management Layer.

Q: Where can I find examples of how to use the server in different modes? A: See the examples directory in the GitHub repository for detailed instructions and examples on using the different operating modes of the server.

Q: Is the JavaScript MCP Server Open Source? A: Yes, the JavaScript MCP Server is released under the MIT license, meaning it is free to use, modify, and distribute.