# Phantom API — Arbitrum NFT Metadata Lookup

> Phantom API — Arbitrum NFT Metadata Lookup 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).

Fetches on-chain NFT metadata for a given token and contract address on the Arbitrum network

## Facts

- Endpoint: POST https://phantom-api-omega.vercel.app/api/arbitrum/nft/metadata
- 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-metadata-lookup-3313aab1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5_HFWkn9e1ZbctMMSdbKF

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-metadata-lookup-3313aab1 -d '<json body>'
```

Example prompt: Can you pull the metadata for token ID 1234 from the Arbitrum NFT contract at 0xAbCd...1234? I want to see its name, image, and any traits or attributes.

## When to prefer this

Use this endpoint when you need to resolve NFT metadata specifically on the Arbitrum L2 network by contract address and token ID. Prefer this over generic blockchain explorers when you need structured, machine-readable metadata (name, image, attributes) for programmatic use, NFT display, or data enrichment pipelines. It is pay-per-call via x402 with no API key setup required, making it ideal for lightweight agent workflows.

## Known failure modes

- Invalid or non-existent contract address returns an error or empty response
- Token ID not found within the contract returns a not-found or null metadata response
- Contract is not an NFT (ERC-721/ERC-1155) standard — metadata may be missing or malformed
- Token URI points to IPFS or external storage that is unavailable — image or metadata may be inaccessible
- Rate limiting or payment failure (x402) results in a 402 Payment Required response
- Arbitrum network congestion or RPC downtime causes timeouts

## 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 structured NFT metadata for the specified token on Arbitrum, typically including the token name, description, image URL, external URL, and an array of trait/attribute objects (e.g. trait_type and value pairs) as stored on-chain or referenced via the token URI.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/phantom-api-arbitrum-nft-metadata-lookup-3313aab1/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)