RFC 9457 API Error Handling
Implements RFC 9457 Problem Details to provide standardized, machine-readable HTTP API error responses for modern backend services.
This skill enables backend architects to standardize API error responses using the latest RFC 9457 specification, the successor to RFC 7807. It provides a production-ready implementation for FastAPI that includes Pydantic models for the Problem Details schema, specialized exception classes, and custom handlers. By utilizing this skill, developers can ensure their APIs return consistent, structured JSON error objects (application/problem+json), making it easier for client-side applications and automated systems to interpret and react to errors like validation failures, rate limits, and resource conflicts.
Key Features
0169 GitHub stars
02Centralized Error Type Registry for consistent API documentation
03Pydantic-based schema for machine-readable error validation
04Support for extension fields to provide additional machine-readable context
05RFC 9457 compliant error responses (application/problem+json)
06Custom FastAPI exception handlers and base ProblemException classes
Use Cases
01Migrating legacy API error structures from RFC 7807 to the modern RFC 9457 standard
02Implementing detailed validation error responses that help frontend developers debug issues
03Standardizing error formats across microservices for consistent client consumption