APIs.guru vs Hipsum

APIs.guru maintains the largest searchable directory of OpenAPI/Swagger definitions for public APIs, normalizing specs pulled from thousands of providers into one browsable catalogue. Its own machine-readable endpoint (api.apis.guru/v2) needs no key or account and returns the full listing plus individual OpenAPI documents as JSON or YAML. The project is open-source and entirely free, run as a community effort rather than a paid product.

Hipsum is a small, keyless JSON API that generates hipster-themed lorem ipsum text — pure hipster jargon or a mix of hipster-speak and classic Latin filler, with control over paragraph or sentence counts. It's a single-maintainer WordPress-hosted side project with no published rate limit and no support commitment, but the endpoint responds reliably and sends permissive CORS headers.