NFT floor price

Get the current floor price for an NFT collection across OpenSea + LooksRare (Ethereum). Returns per-marketplace floor (ETH), collection URL, retrieval timestamp, and the cheapest cross-marketplace floor with the marketplace tag. Use to price a collection without scraping marketplace UIs, or to detect cross-venue arbitrage gaps.

Input

Field	Type	Description
contract *	string	NFT contract address (0x-prefixed 40-hex).
network	string	Chain: ethereum, base, polygon, arbitrum, optimism (default ethereum). Cross-marketplace floors are Ethereum-mainnet only.

Example output

{
  "contract": "0xbc4ca0eda7647a8ab7c2061c2e118a18a936f13d",
  "network": "ethereum",
  "openSea": {
    "available": true,
    "floorPrice": 13.5,
    "priceCurrency": "ETH",
    "collectionUrl": "https://opensea.io/collection/boredapeyachtclub",
    "retrievedAt": "2026-06-22T19:00:00.000Z"
  },
  "looksRare": {
    "available": true,
    "floorPrice": 13.7,
    "priceCurrency": "ETH",
    "collectionUrl": "https://looksrare.org/collections/0xbc4c...",
    "retrievedAt": "2026-06-22T19:00:00.000Z"
  },
  "cheapestFloorEth": 13.5,
  "cheapestMarketplace": "opensea",
  "source": "alchemy-nft-v3"
}

Try it — see the 402 challenge (free)

curl -i -X POST https://agent402.tools/api/nft-floor \
  -H "Content-Type: application/json" \
  -d '{"contract":"0xbc4ca0eda7647a8ab7c2061c2e118a18a936f13d"}'

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-floor", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "contract": "0xbc4ca0eda7647a8ab7c2061c2e118a18a936f13d"
  }),
});

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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