This is an AT Protocol Personal Data Server (an atproto PDS).

Host:     pds.rime.grandiras.net
DID:      did:web:pds.rime.grandiras.net
Software: atproto-pds 0.15.0-rc.6+eb866e08d6

Most API routes are under /xrpc/
Account portal:  /account
Health:          /xrpc/_health

Protocol: https://atproto.com