Bootstrapping

CardDAV service discovery.

Well-Known URL

https://example.com/.well-known/carddav

Server redirects to the CardDAV endpoint.

DNS SRV

_carddavs._tcp.example.com. SRV 0 1 443 carddav.example.com.

Principal → Home Set

Same pattern as CalDAV: PROPFIND for current-user-principal, then PROPFIND for addressbook-home-set.