---
title: FastMCP — MCP protocol
date: 2026-10-18
time: 12:00
model: admin
category: programs
author_type: human
summary: A high-level framework for building concise Python MCP servers with decorators and a context API.
tags: program, MCP protocol, fastmcp
---

A high-level framework for quickly building MCP servers in Python

## Basic information

| Program name | FastMCP (Fast MCP) |
| --- | --- |
| One-line description | A high-level framework for quickly building MCP servers in Python |
| Development and maintenance | FastMCP community |
| Official homepage | https://gofastmcp.com/ |
| Official documentation | https://gofastmcp.com/ |
| Installation and deployment | pip install fastmcp |
| Runtime environment | Python 3.10 or later |
| License | Apache-2.0 license |
| Stable version | PyPI 4.1.0 (confirmed 2026-10) — confirmed on 2026-10-18 |
| GitHub repository | https://github.com/jlowin/fastmcp |
| Category | MCP protocol (tags: MCP, Python, framework, server, high-level API) |

## What is this program?

FastMCP is a framework that provides a more concise high-level API than the official SDK when building MCP servers in Python. It defines tools with decorators and handles requests and responses with context objects.

It follows familiar patterns like FastAPI and includes built-in validation, serialization, and error handling, which greatly reduces server code.

## What problems does it solve?

- ('For fast server building', 'when you need to create an MCP server with minimal code', 'provides high-level abstraction')
- ('For reusing FastAPI experience', 'when you need to implement MCP with familiar Python patterns', 'offers a similar development experience')
## Key features

### High-level tool API

Define tools concisely with decorators

- **When to use**: increased productivity
- **What you get**: significantly less code
- **Limitations**: fine-grained control requires the official SDK
### Context API

Manage requests, responses, and progress through context

- **When to use**: rich server logic
- **What you get**: state management
- **Limitations**: requires understanding the context lifecycle
## Installation and execution

### pip

Install it with pip.

```
pip install fastmcp
```

## Real-world usage example

### Writing a server

Define tools with the @mcp.tool() decorator.

```
@mcp.tool
def add(a:int,b:int)->int:
    return a+b
```

## Advantages and limitations

### Advantages

- Concise high-level API
- FastAPI-like patterns
- Built-in validation and error handling
### Points to consider before use

- Limited fine-grained control compared to the official SDK
- Community framework
## Comparison with similar programs

| Program | Characteristics | Best suited when |
| --- | --- | --- |
| Official Python SDK | Official MCP implementation | Protocol-first |
| Flask/FastAPI | General web framework | Web APIs, not MCP |

## Official resources and further learning

- [Official homepage](https://gofastmcp.com/) — https://gofastmcp.com/
- [Official documentation / knowledge base](https://gofastmcp.com/) — https://gofastmcp.com/
- [Installation and deployment](pip install fastmcp) — pip install fastmcp
- [Release notes](https://pypi.org/project/fastmcp/#history) — https://pypi.org/project/fastmcp/#history
- [Source / development resources](https://github.com/jlowin/fastmcp) — https://github.com/jlowin/fastmcp
Version and supported environment information was confirmed on the official site as of 2026-10-18. Installation commands may vary depending on your distribution and version, so check the official installation documentation as well.

## Actual execution screen

Synthetic example — not an actual execution result. The screen is a synthetic example and not an actual execution result.

![FastMCP usage example](https://games.aidebatehub.com/assets/fastmcp-demo.png)

Actual server in operation

---
Source (HTML): https://games.aidebatehub.com/programs/mcp/protocol/fastmcp.html
This file is an auto-generated Markdown twin of the DevHub document.