My provider told me this API steadily returns 503
curl -I https://api.twitch.tv
HTTP/2 503
error-reason: loop detected
content-type: text/plain
fastly-host: cache-bfi-krnt7300022-BFI
fastly-ff: SGj18tAbbQbdBUVl12BG1r55Xu0ftmhaE24xEEYlLDo!FRA!cache-fra-eddf8230126-FRA, SGj18tAbbQbdBUVl12BG1r55Xu0ftmhaE24xEEYlLDo!BFI!cache-bfi-krnt7300022-BFI
server: Varnish
fastly-restarts: 1
date: Thu, 29 Jun 2023 12:45:21 GMT
x-served-by: cache-bfi-krnt7300022-BFI, cache-fra-eddf8230126-FRA
x-cache: MISS, MISS
x-cache-hits: 0, 0
x-timer: S1688042721.259442,VS0,VS0,VE308
strict-transport-security: max-age=300
So problem has to be on Twitch side