{"ok":true,"service":"nft-alpha-x402","free":true,"paid_endpoint":"POST /api/nft-signal","price":"$0.02 USDC","network":"eip155:8453","example_request":{"collection":"pudgypenguins"},"example_response":{"ok":true,"collection":"pudgypenguins","window":"5m","events":{"listings":18,"sales":9,"bids":41,"offers":12},"prices":{"avg_list":12.4,"min_list":10.9,"avg_sale":13.1},"ratios":{"sell_through":0.5,"bid_to_list":2.28},"signals":[{"type":"BID_FRENZY","detail":"2.3x bids per listing"}],"disclaimer":"Example only. Not financial advice."},"cta":"POST /api/nft-signal with an x402 payment header for live OpenSea Stream analysis. If the live stream has no recent events, the paid response returns an explicit empty result with metadata rather than stale signals."}