NFT recent sales

Recent sales for an NFT collection (or specific token) on any of 5 chains, ordered descending by block. Returns buyer, seller, marketplace (OpenSea/LooksRare/X2Y2/Blur), price (units + wei), protocol/royalty fees, tx hash, block, and quantity for each sale. Use to track volume, detect wash trades by repeat buyer/seller pairs, or chart a collection's price trajectory.

Input

Field	Type	Description
contract *	string	NFT contract address (0x-prefixed 40-hex).
tokenId	string	Optional: limit sales to a specific token ID.
network	string	Chain: ethereum, base, polygon, arbitrum, optimism (default ethereum).
limit	number	Max sales to return (1-100, default 20).

Example output

{
  "contract": "0xbc4ca0eda7647a8ab7c2061c2e118a18a936f13d",
  "tokenId": null,
  "network": "ethereum",
  "count": 1,
  "sales": [
    {
      "txHash": "0xabc...",
      "blockNumber": 19000000,
      "logIndex": 42,
      "buyer": "0xbuyer...",
      "seller": "0xseller...",
      "tokenId": "1234",
      "marketplace": "seaport",
      "marketplaceAddress": "0x00000000006c3852cbef3e08e8df289169ede581",
      "priceUnits": 12.5,
      "priceCurrency": "ETH",
      "priceWei": "12500000000000000000",
      "protocolFeeWei": "0",
      "royaltyFeeWei": "312500000000000000",
      "tokenType": "ERC721",
      "quantity": "1"
    }
  ],
  "pageKey": null,
  "source": "alchemy-nft-v3"
}

Try it — see the 402 challenge (free)

curl -i -X POST https://agent402.tools/api/nft-sales \
  -H "Content-Type: application/json" \
  -d '{"contract":"0xbc4ca0eda7647a8ab7c2061c2e118a18a936f13d","network":"ethereum","limit":5}'

The response is HTTP 402 Payment Required with exact payment requirements. Any x402 v2 client pays automatically and retries:

Paid call (JavaScript agent)

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client();
registerExactEvmScheme(client, { signer: privateKeyToAccount(KEY) });
const payFetch = wrapFetchWithPayment(fetch, client);

const res = await payFetch("https://agent402.tools/api/nft-sales", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "contract": "0xbc4ca0eda7647a8ab7c2061c2e118a18a936f13d",
    "network": "ethereum",
    "limit": 5
  }),
});

Wallet-only. This tool reaches the network/browser/storage, so it is paid in USDC via x402 (no proof-of-work tier).

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