# Python MCP SDK Analysis
This document contains findings from analyzing the official Python MCP SDK (https://github.com/modelcontextprotocol/python-sdk) and how our Poe Proxy MCP server implementation compares.
## Key Findings
### 1. SDK Structure
The official Python MCP SDK has a modular structure:
- `mcp/server/fastmcp/` - Core FastMCP implementation
- `server.py` - Main FastMCP server class
- `tools/` - Tool management and implementation
- `resources/` - Resource management and implementation
- `prompts/` - Prompt management
- `utilities/` - Utility functions and classes
### 2. FastMCP Implementation
The official FastMCP implementation:
- Uses a class-based approach with decorators for tools and resources
- Supports both synchronous and asynchronous tools
- Provides a context object for tools to access session information
- Supports multiple transport protocols (stdio, SSE)
- Has built-in error handling and logging
Example from the SDK:
```python
from mcp.server.fastmcp import FastMCP
# Create an MCP server
mcp = FastMCP("Demo")
# Add a tool
@mcp.tool()
def add(a: int, b: int) -> int:
"""Add two numbers"""
return a + b
# Add a resource
@mcp.resource("greeting://{name}")
def get_greeting(name: str) -> str:
"""Get a personalized greeting"""
return f"Hello, {name}!"
```
### 3. Compatibility Issues with Our Implementation
Our current implementation has several compatibility issues with the official SDK:
1. **Import Path**: We're using `from fastmcp import FastMCP`, but the official SDK uses `from mcp.server.fastmcp import FastMCP`
2. **Tool Implementation**: Our tool implementation is similar but may not fully match the official SDK's parameter handling
3. **Context Object**: The official SDK provides a context object for tools, which we're not fully utilizing
4. **Error Handling**: Our error handling approach differs from the official SDK
5. **Transport Protocols**: We need to ensure our SSE implementation matches the official SDK
### 4. Claude Compatibility Requirements
For Claude 3.7 Sonnet compatibility, we need to ensure:
1. **Thinking Protocol**: Our implementation of Claude's thinking protocol should be compatible with the SDK
2. **Session Management**: Session handling should align with the SDK's approach
3. **Error Handling**: Proper error handling for Claude-specific issues
4. **Transport Protocol**: Ensure our SSE implementation works with Claude clients
### 5. Required Updates
To ensure compatibility with the official SDK and Claude 3.7 Sonnet, we need to:
1. Update our import paths and class structure
2. Refactor our tool implementation to match the SDK
3. Implement proper context object handling
4. Enhance error handling to match the SDK
5. Ensure our transport protocols are compatible
6. Test thoroughly with Claude 3.7 Sonnet
## Recommendations
1. **Refactor Core Implementation**: Update our core implementation to match the official SDK structure
2. **Update Tool Decorators**: Ensure our tool decorators match the SDK's implementation
3. **Enhance Context Handling**: Implement proper context object handling for tools
4. **Standardize Error Handling**: Update our error handling to match the SDK
5. **Test with Claude**: Test thoroughly with Claude 3.7 Sonnet to ensure compatibility
## Next Steps
1. Create tasks in our Dart backlog for each required update
2. Prioritize updates based on impact on Claude compatibility
3. Implement updates in a structured manner
4. Test thoroughly with Claude 3.7 Sonnet
5. Update documentation to reflect changes
## References
- [Python MCP SDK](https://github.com/modelcontextprotocol/python-sdk)
- [FastMCP Documentation](https://github.com/modelcontextprotocol/python-sdk/tree/main/examples/fastmcp)
- [Claude 3.7 Sonnet Documentation](https://docs.anthropic.com/claude/docs/claude-3-7-sonnet)
