# Phantom API — Base NFT Floor Price

> Phantom API — Base 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 2026-10-20).

Returns the current floor price for an NFT collection on the Base blockchain given a contract address

## Facts

- Endpoint: POST https://phantom-api-omega.vercel.app/api/base/nft/floor-price?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/phantom-api-base-nft-floor-price-1fb2278b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_oBdIwCrLnqUUDzhcN5pXv

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-base-nft-floor-price-1fb2278b -d '<json body>'
```

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

## When to prefer this

Use this endpoint when you need real-time NFT floor price data specifically on the Base blockchain and want a simple pay-per-call model without a subscription. Prefer this over general NFT marketplaces APIs when you need programmatic on-chain access with micropayment billing via x402 protocol.

## Known failure modes

- Invalid or non-existent contract address returns an error or empty result
- Contract address exists but is not an NFT collection returns an error
- Network congestion or RPC issues may cause timeouts
- Payment of $0.01 USDC required per call via x402; missing or failed payment results in 402 response
- Contract on a different chain (not Base) may return no data

## 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 the Base blockchain, likely including the price value in ETH or USD and possibly marketplace source 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-base-nft-floor-price-1fb2278b/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)