Smarkets API latency

Smarkets is a UK-regulated peer-to-peer betting exchange with a public CLOB order book endpoint. The harness probes /v3/markets/{id}/ for price (5s interval) and /v3/markets/{id}/quotes/ for the book (5s interval). No authentication is required for either. No visible CDN layer sits between the probe and origin, so latency reflects the API server response time directly. Smarkets is the only non-US venue in the cohort and its primary user base and server infrastructure are UK-centric, which affects the relative latency from US East vs EU West probe nodes.