MCP Python SDK
by Model Context Protocol
Build MCP servers and clients in Python, fast.
Overview
The official Python SDK for Model Context Protocol servers and clients lets you build MCP servers that expose tools, resources, and prompts to LLM applications in a secure, standardized way, and MCP clients that connect to any server. It emphasizes minimal code: you primarily write decorated Python functions with type hints, and the SDK generates JSON schemas, request parsing, validation, and protocol handling for you. It supports multiple transports (stdio, Streamable HTTP, and SSE) and clients can connect via URLs, subprocess stdio, custom transports, or direct in-memory connections for testing. It requires Python 3.10+; the v1.x line is the stable, production-recommended release while a v2 line is in pre-release.
At a Glance
- Topic
- MCP
- Level
- Intermediate
- Format
- Documentation
- Cost
- Free
- Provider
- Model Context Protocol
- Hands-on
- Yes — code/exercises
- Certificate
- None
What You’ll Learn
- ✓How to define MCP tools, resources, and prompts as decorated Python functions
- ✓Wiring up stdio, Streamable HTTP, and SSE transports
- ✓Building MCP clients that connect to arbitrary servers
- ✓Using in-memory connections to test servers
Highlights
- •Official, spec-aligned reference implementation
- •Minimal-boilerplate, decorator-driven server definitions
- •Both server and client libraries in one package
Who It’s For
Best For
- ✓Python engineers building MCP servers
- ✓Teams integrating LLM apps with internal tools and data
Prerequisites
- •Intermediate Python (type hints, async basics)
- •Familiarity with LLM/tool-calling concepts
FAQ
What is MCP Python SDK?
The official Python SDK for building Model Context Protocol servers and clients. For Python developers who want to expose tools, resources, and prompts to LLM apps, or connect to any MCP server.
Is MCP Python SDK free?
MCP Python SDK is free to access.
What level is MCP Python SDK for?
MCP Python SDK is aimed at a intermediate audience. Recommended background: Intermediate Python (type hints, async basics), Familiarity with LLM/tool-calling concepts.
What will I learn from MCP Python SDK?
You'll learn: How to define MCP tools, resources, and prompts as decorated Python functions; Wiring up stdio, Streamable HTTP, and SSE transports; Building MCP clients that connect to arbitrary servers; Using in-memory connections to test servers.