Frequently Asked Questions (FAQ) about FastMCP

Q: What is FastMCP? A: FastMCP is a TypeScript framework for building MCP (Model Context Protocol) servers. It simplifies the process of creating servers that allow AI models to access and interact with external data sources and tools.

Q: What is an MCP Server? A: An MCP server acts as a bridge, enabling AI models to access and interact with external data sources and tools. MCP, or Model Context Protocol, is an open protocol that standardizes how applications provide context to LLMs.

Q: What are the key features of FastMCP? A: Key features include simple tool, resource, and prompt definition, authentication, session management, image content support, logging, error handling, SSE (Server-Sent Events), progress notification, typed server events, prompt argument autocompletion, and a CLI for testing and debugging.

Q: What is Standard Schema and how is it used in FastMCP? A: FastMCP uses Standard Schema specification for defining tool parameters, allowing you to use your preferred schema validation library, such as Zod, ArkType, or Valibot.

Q: What are Tools, Resources, and Prompts in FastMCP? A: * Tools are the functions that your MCP server exposes to clients and LLMs.

• Resources represent the data that your MCP server provides to clients.
• Prompts allow you to define reusable prompt templates and workflows.

Q: How does FastMCP handle authentication? A: FastMCP allows you to authenticate clients using custom functions. This ensures that only authorized clients can access your MCP server.

Q: What is the session object in FastMCP? A: The session object provides access to the active client session, allowing you to maintain state and track client interactions.

Q: How can I get started with FastMCP? A: You can install FastMCP using npm (npm install fastmcp) and then create a simple MCP server and test it using the FastMCP CLI (npx fastmcp dev server.ts).

Q: What is the MCP Inspector and how do I use it? A: The MCP Inspector is a tool that allows you to inspect your MCP server. You can use it by running npx fastmcp inspect server.ts.

Q: How does FastMCP integrate with UBOS? A: FastMCP seamlessly integrates with the UBOS platform, providing a powerful tool for building AI agents that can interact with external data sources and tools.

Q: Can I use FastMCP with Claude Desktop? A: Yes, you can use FastMCP with Claude Desktop by following the instructions at https://modelcontextprotocol.io/quickstart/user.

Q: How can I contribute to FastMCP? A: If you have developed a server using FastMCP, you can submit a PR to have it featured as a case study.