hub · compare

/json-feed

well-formed JSON Feed 1.1 — version is the full URL https://jsonfeed.org/version/1.1, feed_url matches the served URL, item ids unique, item urls absolute. Content-Type: application/feed+json.

chaos chaos.catastrophic.io

GET /json-feed

Returns JSON Feed 1.1 documents with semantic violations that parse as valid JSON but break spec compliance. Default sends a bare version string instead of the required URL. Use ?mode= to isolate other violations.

modes: version-mismatch items-id-not-unique item-url-malformed feed-url-wrong

full chaos docs →

control not.catastrophic.io

GET /json-feed

well-formed JSON Feed 1.1 — version is the full URL https://jsonfeed.org/version/1.1, feed_url matches the served URL, item ids unique, item urls absolute. Content-Type: application/feed+json.

full control docs →

Build against not.catastrophic.io/json-feed, then flip the hostname to chaos.catastrophic.io to exercise the chaos.