# Phantom API – Avalanche NFT by Owner

> Phantom API – Avalanche 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 2026-09-14).

Fetches all NFTs owned by a given wallet address on the Avalanche blockchain, with pagination support

## Facts

- Endpoint: POST https://phantom-api-omega.vercel.app/api/avalanche/nft/by-owner
- 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-avalanche-nft-by-owner-3c807450
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_m_qxrpKCq-mVqp6VtSeRr

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-avalanche-nft-by-owner-3c807450 -d '<json body>'
```

Example prompt: Show me all the NFTs owned by Avalanche wallet 0xAbc123... — fetch up to 50 results.

## When to prefer this

Use this endpoint when you need on-chain NFT ownership data specifically on the Avalanche network, with pay-per-call pricing via x402 (no API key subscription needed). Prefer it over self-hosted RPC calls when you want a managed, low-latency abstraction that handles indexing across 57+ networks and returns structured NFT metadata without raw RPC parsing.

## Known failure modes

- Invalid or malformed wallet address returns a 400 or empty result
- Wallet with no NFTs returns an empty list
- Expired or invalid pageKey breaks pagination and may return an error
- Rate limiting or quota exceeded on the pay-per-call plan
- Network timeout on slow Avalanche RPC nodes
- Payment not processed (x402) results in 402 response blocking the call

## 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 a paginated list of NFTs owned by the specified Avalanche wallet address, including token IDs, contract addresses, metadata, and a pageKey for fetching the next page of results.

## 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-avalanche-nft-by-owner-3c807450/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)