> Does the wayback machine offer a JSON/REST API to check for URLs, in the sense of sending a URL and getting back a map of specific crawl datetimes that are av

> Does the wayback machine offer a JSON/REST API to check for URLs, in the sense of sending a URL and getting back a map of specific crawl datetimes that are available in the cache? Have you looked at the headers that they send? GET /web/20100330210402/https://arxiv.org/abs/0911.1112 HTTP/2 [...] HTTP/2 200 OK [...] link: <http://arxiv.org/abs/0911.1112>; rel="original", <https://web.archive.org/web/timemap/link/http://arxiv.org/abs/0911.1112>; rel="timemap"; type="application/link-format", <https://web.archive.org/web/http://arxiv.org/abs/0911.1112>; rel="timegate", <https://web.archive.org/web/20100330210402/http://arxiv.org/abs/0911.1112>; rel="first memento"; datetime="Tue, 30 Mar 2010 21:04:02 GMT", <https://web.archive.org/web/20100330210402/http://arxiv.org/abs/0911.1112>; rel="memento"; datetime="Tue, 30 Mar 2010 21:04:02 GMT", <https://web.archive.org/web/20110101203756/http://arxiv.org/abs/0911.1112>; rel="next memento"; datetime="Sat, 01 Jan 2011 20:37:56 GMT", <https://web.archive.org/web/20211123040625/https://arxiv.org/abs/0911.1112>; rel="last memento"; datetime="Tue, 23 Nov 2021 04:06:25 GMT" [...] The Wayback Machine implements RFC 7089. <http://mementoweb.org/guide/quick-intro/ http://mementoweb.org/guide/quick-intro/>