Cataas vs RandomFox

Cataas ("Cat as a Service") is a free, open-source REST API that returns random cat images and animated GIFs, filterable by tag, with options to overlay custom text or crop a specific position. A JSON mode (?json=true) returns the image's metadata — id, tags, and direct URL — instead of the binary file itself. It's maintained on GitHub under the cataas org with no signup or pricing tier; a Donate link is the site's only monetization.

RandomFox.ca returns a JSON object with a direct image URL and a shareable link to a random fox photo drawn from a community-submitted collection. It's a free, keyless hobby project with no published rate limit or pricing tier.