# agent402.tools NFT Floor Price

> agent402.tools NFT Floor Price is a paid API for AI agents from agent402.tools, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).

Fetches the current floor price for an NFT collection across OpenSea and LooksRare on Ethereum, returning per-marketplace and cross-marketplace cheapest floor in ETH.

## Facts

- Endpoint: POST https://agent402.tools/api/nft-floor
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent402-tools-nft-floor-price-d379d721
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_BpjUy2NmvZOQzVy7oCRvL

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability agent402-tools-nft-floor-price-d379d721 -d '<json body>'
```

Example prompt: What's the cheapest floor price right now for the NFT collection at Ethereum contract 0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D — check both OpenSea and LooksRare and tell me which marketplace is lowest.

## When to prefer this

Use this endpoint when you need real-time NFT floor prices aggregated across OpenSea and LooksRare on Ethereum in a single call, especially when you want the cheapest available entry price with marketplace attribution. Prefer this over single-marketplace lookups when comparative pricing matters.

## Known failure modes

- Invalid or non-NFT contract address returns an error or empty results
- Non-Ethereum network requested for cross-marketplace floor (only Ethereum mainnet supported)
- Contract address not found on either marketplace returns null or zero floors
- Rate limiting or marketplace API outage may cause partial or failed responses
- Malformed 0x address format returns a validation error

## How this service works

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.

## Output

Returns per-marketplace floor prices in ETH for OpenSea and LooksRare, the collection URLs for each, a retrieval timestamp, and a single cheapest cross-marketplace floor value tagged with the marketplace name.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "network": {
   "type": "string",
   "description": "Chain: ethereum, base, polygon, arbitrum, optimism (default ethereum). Cross-marketplace floors are Ethereum-mainnet only."
  },
  "contract": {
   "type": "string",
   "description": "NFT contract address (0x-prefixed 40-hex)."
  }
 }
}
```

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent402-tools-nft-floor-price-d379d721/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent402.tools](https://www.zero.xyz/host/agent402.tools/llms.txt)