FastMCP

FastMCP is a Pythonic framework designed for building Model Context Protocol (MCP) servers, clients, and applications. It targets developers looking to rapidly prototype and deploy MCP-compliant systems, enabling easy exposure of tools, resources, and prompts to LLMs. It automates protocol mechanics like schema generation, validation, transport negotiation, and authentication, allowing users to focus on application logic. FastMCP is actively maintained by Prefect, powers a significant portion of MCP servers, and can be deployed for free on Prefect Horizon.