chainquery Bitcoin RPC: pay-per-call Bitcoin Core over x402, no API key. Current Bitcoin (BTC) chain state from chainquery's independent full node: height, best block hash, difficulty, sync progress, on-disk size. Bitcoin Core getblockchaininfo.
| Network | Scheme | Amount | Pay To |
|---|---|---|---|
| Base | exact | $0.005000 USDC | 0x7Cf4...87ff |