# Phantom API — Token Balances

> Phantom API — Token Balances 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 2026-10-16).

Fetches 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/plasma/token/balances?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/phantom-api-token-balances-5f237277
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AVWEmznw1B4hbtYF3Gf_a

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-5f237277 -d '<json body>'
```

Example prompt: What are the token balances for wallet 0xAbCd...1234? Also check specifically for the USDC contract at 0x...a0b8 and the USDT contract at 0x...dAC1.

## When to prefer this

Use this endpoint when you need fast, pay-per-call on-chain token balance lookups across a broad range of EVM-compatible or multi-chain networks without committing to a subscription. It is well-suited for agents that need ad-hoc balance checks for arbitrary wallets and token contracts, especially when supporting 57+ networks matters and low per-query cost ($0.01 USDC) is a priority over high-volume bulk pricing.

## Known failure modes

- Invalid or malformed wallet address returns an error or empty result
- Non-existent contract addresses may return zero balances or errors
- Network unavailability across the 57+ supported chains could result in partial data
- Unsupported blockchain network for certain contract addresses
- Rate limits or payment failures under x402 protocol returning 402 responses

## 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 token balance data for the specified wallet owner, including balances for each token contract address provided. The response includes per-token holdings amounts, likely with token metadata such as symbol and decimals, enabling portfolio-level or contract-specific balance lookups.

## 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-5f237277/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)