.well-known/assetlinks.json Examples: https://www.amazon.de/.well-known/assetlinks.json https://www.facebook.com/.well-known/assetlinks.json .well-known/dnt-policy.txt Examples: https://www.eff.org/de/node/80042 .well-known/apple-app-site-association Examples: .well-known/security.txt Examples: .well-known/openpgpkey/hu/hdfxjxgbc3gqbojrdsboyxw4qqg8x471 Examples: .well-known/acme-challenge/ .well-known/acme-challenge/LXXZ7R4JFXOYTS9I6KBIDRWU_APNWLP8 Examples: verify https certificates - checks from letsencrypt.org