All client nodes connect to port 443/tcp using persistent multiplexed TLS 1.3 sessions with X25519 key exchange.
GET /api/v1/health HTTP/2 Host: vellamo-data.online Accept: application/json
Unauthenticated requests are routed to the public telemetry dashboard. Authorized cluster agents must present a valid session UUID and ephemeral short-token during handshake.