# Phantom API — Optimism NFT Floor Price

> Phantom API — Optimism 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 2026-09-15).

Returns the current floor price for a given NFT collection contract on the Optimism network

## Facts

- Endpoint: POST https://phantom-api-omega.vercel.app/api/optimism/nft/floor-price
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/phantom-api-optimism-nft-floor-price-a8dedd1e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_aPuYIxSU0pAlVAJerE-OG

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-optimism-nft-floor-price-a8dedd1e -d '<json body>'
```

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

## When to prefer this

Choose this endpoint when you need real-time, on-chain NFT floor price data specifically for the Optimism Layer 2 network. It is ideal for agents monitoring NFT collections, evaluating portfolio value, or comparing prices across chains. Prefer this over generic NFT APIs when Optimism-specific data is required and pay-per-call pricing is acceptable.

## Known failure modes

- Invalid or non-existent contract address returns an error or empty result
- Contract address exists but has no active listings, resulting in a null floor price
- Network issues or Optimism RPC downtime causing request failure
- Malformed contract address format causing a validation error
- Payment failure via x402 preventing the call from completing

## 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 for the specified NFT collection on Optimism, likely including the price value in ETH or relevant token denomination, sourced directly from on-chain 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-optimism-nft-floor-price-a8dedd1e/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)