Agent API observatory

Base mainnet RPC, the x402 facilitator), the OpenAI and Anthropic status pages, and two baselines (Google generate_204, Cloudflare trace) that show how the vantage itself is doing. Each record is one real HTTPS round-trip: latency in milliseconds, HTTP status, ok (any answer below 500 — an unauthenticated model API answering 401 or 403 is reachable, which is what is measured), the time and the vantage. Never synthetic, never estimated. Two rounds per run every 6 hours. Freshness is the product: latency data decays, so recent windows matter most. Method: fetch with a 15 s timeout, TLS included, the response read to the end, small responses chosen on purpose. Vantage: one shared AWS EC2 host in Seoul (ap-northeast-2) (each row names it in vantage), so absolute values carry that bias; deltas, the gap to the baselines and availability flips are the durable signal.