SafeKey FIDO Bridge is a credential provider that lets you use FIDO2 security keys for passkey authentication on Android via NFC. 

Android natively supports FIDO2 security keys over NFC, but its implementation can cause compatibility issues with some authenticators due to its use of extended APDU commands. Android also provides no native way to manage a security key's PIN or the passkeys stored on it. SafeKey FIDO Bridge addresses these limitations by communicating directly with the security key using standard APDU commands, avoiding the extended APDU compatibility issues in Android's native implementation.

Install it, enable it as a passkey provider in your phone's settings, and use passkeys anywhere Android's Credential Manager is supported.

• PIN management, to set or change the PIN that gates passkey (resident credential) support on the device
• Full passkey management: view, create, and delete the passkeys stored on your security key
• Access to both PIN and full passkey management over USB-C and NFC
• The ability to actually sign in with a passkey over NFC on keys that aren't natively supported

Requires Android 14+ and a FIDO2-compatible security key or smartcard.