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Phantom API — Token Balances Lookup
x402
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 on-chain token balances for a given wallet address across specified ERC-20 or native contract addresses
Price / call$0.01
Success—
StatusUnknown
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 on-chain token balance data for the specified wallet owner across one or more contract addresses, including balance amounts for each token contract queried.
Example use cases
DeFi portfolio balance checker
“Can you pull the current on-chain token balances for my wallet 0x1234abcd...5678 for USDC (0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48) and WETH (0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2)?”
Airdrop eligibility verification
“Check the on-chain token balance for wallet 0xDeadBeef...1234 against contract 0xMyToken...5678 — I need to know if they hold any tokens before we approve the airdrop claim.”
Smart contract holdings audit
“For the wallet address 0xVault...9999, look up balances across these three contract addresses: 0xToken1, 0xToken2, and 0xToken3 — I'm auditing what tokens the treasury is holding on-chain.”
Technical details
Endpoint
POSThttps://phantom-api-omega.vercel.app/api/tempo/token/balances?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need fast, pay-per-call on-chain token balance lookups for a specific wallet and set of ERC-20 or token contracts, without needing a full node subscription. Ideal for spot checks, airdrop verification, DeFi portfolio queries, or treasury audits where you need current holdings data across multiple token contracts in a single call.
Side effects
- Invalid or malformed wallet address returns an error or empty result
- Invalid contract address causes a failed or null balance lookup
- Network not supported returns an error or no data
- Rate limit or payment failure results in a 402 or 429 error
- Empty contractAddresses array may return no results or a generic balance
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| owner | string | |
| contractAddresses | array |
Tags
x402
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