# Phantom API — Token Balances Lookup

> Phantom API — Token Balances 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 2026-10-12).

Fetches ERC-20 and other token balances for a given wallet address, optionally filtered by specific contract addresses, across 57+ blockchain networks.

## Facts

- Endpoint: POST https://phantom-api-omega.vercel.app/api/adi/token/balances?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/phantom-api-token-balances-lookup-9df88f92
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_LuS2yykZFFOu3sogoTWr3

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-token-balances-lookup-9df88f92 -d '<json body>'
```

Example prompt: Check the token balances for wallet address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 — I want to see all ERC-20 tokens it holds, especially USDC and WETH.

## When to prefer this

Choose this endpoint when you need fast, pay-per-call on-chain token balance lookups across a wide range of EVM-compatible and other networks without committing to a subscription. It is ideal for AI agents that need spot checks of wallet holdings, portfolio snapshots, or pre-trade balance verification at minimal cost ($0.01 per call). Prefer alternatives like Alchemy or Moralis if you need high-volume batch lookups with predictable monthly pricing.

## Known failure modes

- Invalid or malformed wallet address returns an error
- Unsupported network or chain not among the 57+ covered networks
- No token balances found returns empty array
- Payment failure via x402 protocol blocks the request
- Rate limiting or network congestion causes timeout
- Invalid contract address format in the contractAddresses array

## 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 list of token balances associated with the specified owner wallet address, including token contract addresses, token amounts, and potentially token symbols/decimals. When specific contract addresses are provided, results are filtered to those tokens only.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "owner": {
   "type": "string"
  },
  "contractAddresses": {
   "type": "array",
   "items": {
    "type": "string"
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/phantom-api-token-balances-lookup-9df88f92/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)