# Phantom API — Arbitrum NFT by Owner

> Phantom API — Arbitrum NFT by Owner 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 all NFTs owned by a given wallet address on the Arbitrum network, with pagination support

## Facts

- Endpoint: POST https://phantom-api-omega.vercel.app/api/arbitrum/nft/by-owner
- 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-arbitrum-nft-by-owner-51b2fa0c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_kEAQJeVUD-2Ilj7zadiJl

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-by-owner-51b2fa0c -d '<json body>'
```

Example prompt: Can you pull up all the NFTs owned by wallet 0xAbC123...789 on Arbitrum — show me up to 50 results?

## When to prefer this

Use this endpoint when you need to enumerate NFT holdings for a specific wallet address specifically on the Arbitrum L2 network. Prefer this over Ethereum mainnet NFT endpoints when your use case is Arbitrum-native assets. Ideal for portfolio displays, NFT-gated access checks, and collector analytics on Arbitrum.

## Known failure modes

- Invalid or malformed wallet address returns an error or empty result
- Non-existent or zero-NFT wallet returns an empty list
- Rate limiting or payment failure (x402) blocks the call
- Invalid pageKey causes pagination to fail or reset
- Network timeout if Arbitrum indexer is slow to respond

## 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

A list of NFTs owned by the specified address on Arbitrum, including token IDs, contract addresses, metadata (name, image, attributes), and a pagination key for fetching subsequent pages.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "limit": {
   "type": "number"
  },
  "owner": {
   "type": "string"
  },
  "pageKey": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/phantom-api-arbitrum-nft-by-owner-51b2fa0c/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)