TwoFactorAuthDirectory (nuget): With this library you can easily determine which website supports which type of 2fa. The library uses the 2fa.directory API.   With this library you can get a list of websites filtered -by supported type of 2fa -by fixed domain -by url -by name -by keywords -by regions   More details on GitHub.
Keywords: 2fa|twofactor|authentication|totp|hotp|u2f|fido|password|security