Registry errors

Registry errors happen while a tool is trying to authenticate, fetch, publish, or negotiate content with a package, artifact, or image registry.

These pages help users compare related error messages, common causes, and how-to-fix steps across different tools that fail in the same way.

Registry errors usually appear in package, artifact, or image workflows where authentication, permissions, naming, availability, or content integrity can all surface as similar-looking failures.

This hub collects registry-related errors across ecosystems so users can quickly distinguish access problems from naming, versioning, publishing, and upstream service issues.

Docker npm

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429 pull rate limit

Docker Hub pull rate limit reachedDocker

Too Many Requests

Docker Hub returned Too Many RequestsDocker

Unexpected status code 500

Docker Hub returned unexpected status code 500Docker

malformed HTTP response

Docker received a malformed HTTP response from a registryDocker

Error: Invalid JSON / Unexpected token <

npm registry response produced invalid JSONnpm

404 Not Found / Server error

npm registry returned 404 or server errornpm