# Phantom API – Ethereum NFT Floor Price

> Phantom API – Ethereum NFT Floor Price is a paid API for AI agents from phantom-api-omega.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-16).

Returns the current floor price for an Ethereum NFT collection given its contract address

## Facts

- Endpoint: POST https://phantom-api-omega.vercel.app/api/ethereum/nft/floor-price?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/phantom-api-ethereum-nft-floor-price-b8c986e4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vIeoci05DTOvfM7eXs-I7

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 phantom-api-ethereum-nft-floor-price-b8c986e4 -d '<json body>'
```

Example prompt: What's the current floor price for the NFT collection at Ethereum contract address 0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D?

## When to prefer this

Use this endpoint when you need a fast, pay-per-call floor price lookup for an Ethereum NFT collection by contract address without committing to a subscription. Prefer this over general blockchain RPC calls when you need marketplace-aggregated floor pricing rather than raw on-chain transfer data.

## Known failure modes

- Invalid or malformed contract address returns an error
- Contract address is not an NFT collection (ERC-721/ERC-1155) and cannot be priced
- Collection has no active listings, resulting in no floor price available
- Network congestion or upstream data latency may cause stale or delayed results
- Payment failure via x402 protocol blocks the request

## How this service works

Lightning-fast access to blockchain data, smart contract insights, and Web3 infrastructure across 57+ networks. Pay-per-call via x402.

## Output

The agent receives the current floor price for the specified Ethereum NFT collection, typically expressed in ETH or USD, based on live on-chain or marketplace data for the given contract address.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "contractAddress": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/phantom-api-ethereum-nft-floor-price-b8c986e4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from phantom-api-omega.vercel.app](https://www.zero.xyz/host/phantom-api-omega.vercel.app/llms.txt)