FastMCP 3.0 – Pythonic framework for building adaptive AI context applications

Summary: FastMCP 3.0 is a framework for creating AI context applications that integrate tools and data from multiple sources, manage state and access, and support long-running tasks with built-in hot reload, versioning, and observability for production environments.

What it does

It enables sourcing, composing, and transforming components from anywhere, personalizing user views, tracking session state, controlling access, running background tasks, and monitoring APIs with version control.

Who it's for

Developers building advanced AI context applications requiring dynamic information flow management and durable, future-proof infrastructure.

Why it matters

It addresses the challenge of delivering the right information at the right time within complex AI systems beyond basic tool servers.