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Build FastAPI MCP server
·
Module 3
Advanced Pre-Tool Hooks for Validation
1
Custom FastAPI Dependencies for Input Validation
Create a custom FastAPI dependency that performs input validation on tool parameters before execution.
2
Implementing Custom Validation for MCP Server Endpoints
Apply the custom validation dependency to a specific tool endpoint within the MCP server.
Conditional Tool Execution with HTTPException
Implement a 'gating' dependency that conditionally prevents a tool from executing by raising an HTTPException based on business logic.
4
Route vs. Global Dependency Application
Differentiate between applying a dependency to a single FastAPI route versus applying it globally via `AuthConfig`.
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Securing and Scaling the Toolset
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Post-Tool Patterns for State and Response Handling