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

Host:     vesuvius.pyroclastic.cloud
DID:      did:web:vesuvius.pyroclastic.cloud
Software: atproto-pds 0.15.0-rc.4+ts1789846264

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

Protocol: https://atproto.com