Postman Echo vs PurgoMalum

Postman Echo is a keyless sandbox that mirrors whatever you send it back as JSON — headers, query args, form body, cookies, and basic/digest auth attempts — across GET, POST, PUT, DELETE, and PATCH endpoints, plus helpers for testing redirects, delays, streaming, and gzip/deflate encoding. It's built and maintained by the Postman team as the reference backend for their own client tutorials and public collections, so its request/response shapes double as worked examples. There's no signup or key: every route is open, making it a quick target for scripting HTTP-client tests without standing up your own server.

PurgoMalum is a free, keyless GET-only web service that strips or flags profanity and obscenity in a submitted text string, recognizing common character substitutions ("@" for "a", "$" for "s") and an internal profanity list that can be extended per-request with an `add` parameter of extra blocked words. Separate request-type paths return the cleaned text as plain text, XML, or JSON, or return just a "true"/"false" verdict via its `containsprofanity` endpoint, so callers pick the shape they need without content negotiation headers. It's a single-purpose text-moderation utility rather than a full profile of a company's platform — there is no dashboard, key, or paid tier.