# Phantom API — Robinhood Token Balances

> Phantom API — Robinhood 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 2026-10-20).

Fetches token balances for a given wallet owner address, optionally filtered by specific contract addresses, using Robinhood's on-chain data infrastructure.

## Facts

- Endpoint: POST https://phantom-api-omega.vercel.app/api/robinhood/token/balances?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/phantom-api-robinhood-token-balances-938fa9ab
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7abEVeqsKfynkYPQn1nRW

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-robinhood-token-balances-938fa9ab -d '<json body>'
```

Example prompt: What token balances does the wallet 0xABC...123 hold? I want to know about these specific tokens: 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 and 0xdAC17F958D2ee523a2206206994597C13D831ec7.

## When to prefer this

Choose this endpoint when you need fast, pay-per-call on-chain token balance lookups for a specific wallet without committing to a full node provider subscription. Ideal for agents that need occasional wallet portfolio checks across 57+ networks without maintaining their own blockchain infrastructure. Best when you already have a wallet address and optionally specific contract addresses to check.

## Known failure modes

- Invalid or malformed wallet address returns an error or empty result
- Contract address not found on the target network returns zero or null balance
- Rate limiting or payment failure (x402) if USDC micropayment is not properly handled
- Network not supported returns an error response
- Empty response if wallet holds no tokens matching the filter

## 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 identifiers and amounts for each held token, optionally scoped to a provided list of contract addresses.

## 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-robinhood-token-balances-938fa9ab/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)