chainquery Bitcoin RPC: pay-per-call Bitcoin Core over x402, no API key. Estimated fee rate (BTC/kvB) to confirm within a target number of blocks, from chainquery's independent full node. Bitcoin Core estimatesmartfee.
| Network | Scheme | Amount | Pay To |
|---|---|---|---|
| Base | exact | $0.005000 USDC | 0x7Cf4...87ff |