FastMCP
✓ Text source-checked Oct 22, 2026The fast, Pythonic way to build MCP servers and clients.
Source-checked against the vendor's site · rebuilt from the vendor's own pagesProfile updated Link checked How we rate
In short
FastMCP is a Python framework for building MCP servers and clients. It automates schema generation and supports interactive UIs within conversations.
FastMCP is a full Model Context Protocol application framework for servers, clients, and interactive apps.
FastMCP allows users to declare tools with Python functions, automatically generating the schema, validation, and documentation. FastMCP manages transport negotiation, authentication, and protocol lifecycle when connecting to a server with a URL.
The vendor says that the server component of FastMCP wraps Python functions into MCP-compliant tools, resources, and prompts. The app component of FastMCP provides interactive user interfaces for tools that are rendered directly in the conversation. The client component of FastMCP connects to any server with full protocol support.
FastMCP 1.0 was incorporated into the official MCP Python SDK in 2024.
According to FastMCP: FastMCP is a full Model Context Protocol application framework for servers, Clients, and interactive apps. Its pages list this strength: Automatically generates schemas, validation, and documentation from Python functions.
— The AI Tool Bible editorial team
Pros
- ✅ Automatically generates schemas, validation, and documentation from Python functions.
- ✅ Manages transport negotiation, authentication, and protocol lifecycle automatically.
- ✅ Covers the full stack of servers, clients, and interactive apps.
Facts
- API available
- Yes (not source-checked)
- Open source
- Yes (license: Apache-2.0)
- GitHub stars
- 28,225 (checked Oct 29, 2026) (not source-checked)
- Last GitHub push
- Oct 29, 2026 (not source-checked)
- First commit
- Nov 2024 (not source-checked)
- Package downloads (30 d)
- 53,693,015 · pypi fastmcp · checked Oct 11, 2026 (not source-checked)
Where this tool sits
Use cases
Frequently asked
- How much does FastMCP cost?
- FastMCP is free. The provided documentation does not list any specific pricing tiers or additional costs for using the framework.
- What programming language does FastMCP use?
- FastMCP is a Pythonic framework. It allows users to declare tools using standard Python functions, automatically generating the necessary schema, validation, and documentation.
- Can FastMCP create interactive user interfaces?
- Yes. The app component of FastMCP provides interactive user interfaces for tools. These interfaces are rendered directly within the conversation, enhancing user interaction.
- Does FastMCP support connecting to external servers?
- Yes. The client component connects to any server with full protocol support. It manages transport negotiation, authentication, and the protocol lifecycle when connecting via a URL.
- Is FastMCP part of the official MCP SDK?
- Yes. FastMCP 1.0 was incorporated into the official MCP Python SDK in 2024, indicating its integration into the broader Model Context Protocol ecosystem.