PEP 847: Problem Details for the Simple Repository API
This PEP introduces a standardized JSON-based error response format for the Python Simple Repository API. It defines a consistent schema for communicating failure states during package repository interactions.
Verified State Diff
Impact & Verification Analysis
Python package repository maintainers, developers of package management tools, and infrastructure engineers managing private PyPI mirrors.
Standardization reduces integration friction for package managers and improves the reliability of automated dependency resolution by providing clear, actionable error data.
Full Fact Overview
PEP 847 addresses the current lack of a unified error reporting mechanism in the Simple Repository API (PEP 503). By adopting the 'Problem Details for HTTP APIs' standard (RFC 7807), it enables clients to programmatically interpret repository errors—such as authentication failures, rate limiting, or missing resources—without relying on inconsistent HTML-based error pages or non-standardized status codes. This transition moves the ecosystem toward machine-readable API contracts, facilitating better integration for package managers like pip, poetry, and uv.