If IABot wants to poll Ghostarchive.org "availability API" its a simple header check. http://ghostarchive.org/archive/1/https://example.com . "1" being the
date closest to the archive you are looking for. Example headers below.
Archive exists:
mintbox:[/home/adminuser/wmnim/wm2] ./header 'https://ghostarchive.org/archive/1/https://www.youtube.com/watch?v=hltKrT_5q08'
HTTP/1.1 302 Found Server: nginx/1.16.1 Date: Wed, 21 Sep 2022 04:01:34 GMT Content-Type: text/plain; charset=utf-8 Content-Length: 43 Connection: keep-alive Cache-control: no-store Access-Control-Allow-Origin: * Location: /varchive/hltKrT_5q08 Vary: Accept X-Cache-Status: MISS HTTP/1.1 200 OK Server: nginx/1.16.1 Date: Wed, 21 Sep 2022 04:01:34 GMT Content-Type: text/html; charset=utf-8 Content-Length: 5260 Connection: keep-alive Cache-control: no-store Access-Control-Allow-Origin: * Link: <https://ghostarchive.org/oembed?url=https://ghostarchive.org/varchive/hltKrT_5q08&format=json>; rel="alternate"; type="application/json+oembed"; title="Video embed info" Link: <https://ghostarchive.org/oembed?url=https://ghostarchive.org/varchive/hltKrT_5q08&format=xml>; rel="alternate"; type="application/xml+oembed"; title="Video embed info" ETag: W/"148c-eA8EI2llhXze1bnyNbEmDcyiqj8" X-Cache-Status: MISS
Archive not exist:
mintbox:[/home/adminuser/wmnim/wm2] ./header 'https://ghostarchive.org/archive/1/https://www.youtube.com/watch?v=hltKrT_5q09'
HTTP/1.1 302 Found Server: nginx/1.16.1 Date: Wed, 21 Sep 2022 04:04:45 GMT Content-Type: text/plain; charset=utf-8 Content-Length: 43 Connection: keep-alive Cache-control: no-store Access-Control-Allow-Origin: * Location: /varchive/hltKrT_5q09 Vary: Accept X-Cache-Status: MISS HTTP/1.1 404 Not Found Server: nginx/1.16.1 Date: Wed, 21 Sep 2022 04:04:45 GMT Content-Type: text/html; charset=UTF-8 Transfer-Encoding: chunked Connection: keep-alive Cache-control: no-store Access-Control-Allow-Origin: *