# Phantom API — Arbitrum NFT Floor Price

> Phantom API — Arbitrum 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 2026-09-14).

Returns the current floor price for an NFT collection on the Arbitrum network given a contract address

## Facts

- Endpoint: POST https://phantom-api-omega.vercel.app/api/arbitrum/nft/floor-price
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/phantom-api-arbitrum-nft-floor-price-0b0236e5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8Lo1Zf-yaTSliMmHf9KVo

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-arbitrum-nft-floor-price-0b0236e5 -d '<json body>'
```

Example prompt: What's the current floor price for the NFT collection at contract address 0x1234...abcd on Arbitrum?

## When to prefer this

Choose this endpoint when you need fast, pay-per-call NFT floor price data specifically on the Arbitrum network without committing to a subscription. It is ideal for agents that need occasional or event-driven floor price checks rather than continuous streaming. Prefer this over general blockchain explorers when you need structured, ready-to-use price data without parsing raw on-chain events.

## Known failure modes

- Invalid or non-existent contract address returns an error or null result
- Contract exists but has no NFT listings, resulting in no floor price available
- Network congestion or RPC issues causing delayed or failed responses
- Contract address is on a different chain than Arbitrum, returning incorrect or no data
- Payment failure via x402 protocol blocks the request before execution

## 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

Returns the current floor price of the specified NFT collection on Arbitrum, typically expressed as a numeric price value in ETH or the native currency, sourced directly from on-chain or aggregated marketplace data.

## 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-arbitrum-nft-floor-price-0b0236e5/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)