SiteCheck Crypto & Finance

Large Bitcoin transactions (total output >= minBtc, default 10 BTC): every transaction of the latest 1-2 confirmed blocks (mempool.space block summaries), plus the ~10 newest unconfirmed transactions blockchain.info exposes. Returns txid, output value in BTC (includes change), fee rate sat/vB, RBF signal and block height or 'mempool'. `scanned` states exactly what was read.

Open endpoint ↗

Price per call: $0.005
Chain: Base
Method: GET
Paid calls · 30 days: 1

Call it from code

This API is run by its own provider and paid directly through x402. We list it so you can find it; we don't route or hold the payment.

import { x402Client, wrapFetchWithPayment } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";

const client = new x402Client();
registerExactEvmScheme(client, { signer: agentAccount });

const pay = wrapFetchWithPayment(fetch, client);
const res = await pay("https://api.chainmarket-api.workers.dev/api/crypto/btc-whale-txs", { method: "GET" });
console.log(await res.json());

https://api.chainmarket-api.workers.dev/api/crypto/btc-whale-txs