{"demo":true,"note":"Free fixed-input sample of real output. The paid route accepts your own input: /api/chain/head ($0.002 per call via x402: USDC on Base, USDC on Solana, RLUSD on the XRP Ledger or USDC on Polygon; no signup or API key).","paid_endpoint":"https://horizonpulse.dev/api/chain/head","price":"$0.002","fixed_input":"network=base,solana,xrpl (fixed; sample reused for 10 min)","sample_status":200,"sample":{"source":"chain-head","priced":{"amountUsd":"$0.002","amountAtomic":"2000","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","network":"base","payTo":"0x5b32c973596078a967562ca652761404f19be0e9"},"asOf":"2026-10-16T17:22:13.345Z","ok":true,"count":3,"answered":3,"heads":[{"network":"base","caip2":"eip155:8453","chainId":8453,"unit":"block","height":52690992,"headTime":"2026-10-16T17:22:11.000Z","headAgeSeconds":2,"finalizedHeight":52690347,"finalityGap":645,"error":null},{"network":"solana","caip2":"solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp","chainId":null,"unit":"slot","height":457718994,"headTime":"2026-10-16T17:22:12.000Z","headAgeSeconds":1,"finalizedHeight":457718963,"finalityGap":31,"error":null},{"network":"xrpl","caip2":"xrpl:0","chainId":null,"unit":"ledger","height":107699474,"headTime":"2026-10-16T17:22:10.000Z","headAgeSeconds":3,"finalizedHeight":107699474,"finalityGap":0,"error":null}]}}