- ActivityPub (Server-to-Server)
- WebFinger
- draft-cavage-http-signatures-12
- Linked Data Signatures 1.0
- NodeInfo
- RFC 9421: HTTP Message Signatures
- FEP-f1d5: NodeInfo in Fediverse Software
- FEP-8b32: Object Integrity Proofs
- FEP-521a: Representing actor's public keys
- apkit supports
_misskey_quotefor quote compatibility.