RFC 9457 is the current internet standard for 'Problem Details for HTTP APIs.' It defines a machine-readable JSON format to communicate errors, superseding the older RFC 7807.

Is it compatible with older RFC 7807 implementations?

Yes, RFC 9457 is backwards compatible with RFC 7807 while adding improvements like an IANA registry and explicit support for multiple problems.

Does this skill specifically support FastAPI?

Yes, it includes specific implementation patterns, custom exception classes, and middleware handlers optimized for FastAPI and Pydantic-based backends.

Can I add custom fields to the error responses?

Absolutely. The implementation uses Pydantic's 'extra' allow configuration, enabling you to add extension fields for unique machine-readable context while staying compliant with the standard.

Why use structured error responses instead of plain text?

Structured errors allow client applications to programmatically handle specific issues—like identifying which field failed validation or determining retry logic—without fragile text parsing.

RFC 9457 API Error Handling

Name: RFC 9457 API Error Handling
Author: yonatangross

byyonatangross

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Desarrollo de API

Standardizes HTTP API error responses using the machine-readable RFC 9457 Problem Details format for robust backend services.

This skill provides a comprehensive implementation of the RFC 9457 standard (the successor to RFC 7807) to ensure consistent and machine-readable HTTP API error communication. It includes production-ready Pydantic schemas, custom FastAPI exception handlers, and a centralized error type registry. By adopting these patterns, developers can provide API consumers with structured, actionable information—such as specific validation failures or rate limit context—while preventing the leakage of sensitive internal system details and maintaining a professional, predictable interface across the entire backend.

Características Principales

01Extensible error classes for common scenarios like validation, resource not found, and rate-limiting.

02Full RFC 9457 compliance for standardized, machine-readable error responses.

03Seamless FastAPI integration with global exception handlers and custom responses.

04Pre-configured Pydantic models for structured Problem Details schema.

05Centralized error type registry to manage and document API error catalogs.

0669 GitHub stars

Casos de Uso

01Migrating an existing legacy API from inconsistent plain-text errors to RFC 9457 standards.

02Developing public-facing APIs that require structured error context for third-party client integration.

03Implementing a standardized error response system for a new FastAPI or Python microservice.

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add yonatangross/orchestkit error-handling-rfc9457

For use in Claude.ai and ChatGPT

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