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Phantom API — Ethereum Token Balances
x402
Phantom API — Ethereum 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 2026-09-14).
Fetches ERC-20 token balances for a given Ethereum wallet address across specified 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 ERC-20 token balance data for the specified owner address across the provided contract addresses, including token amounts held in the wallet on the Ethereum network.
Example use cases
DeFi portfolio snapshot for a wallet
“Can you pull all the ERC-20 token balances for wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045? I want to see what tokens they're holding on Ethereum.”
Check stablecoin holdings before a transfer
“Before I send funds, can you check how much USDC and DAI wallet 0xAb5801a7D398351b8bE11C439e05C5B3259aeC9B currently holds on Ethereum? USDC contract is 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 and DAI is 0x6B175474E89094C44Da98b954EedeAC495271d0F.”
Verify token eligibility for an airdrop
“I need to verify whether wallet 0x742d35Cc6634C0532925a3b844Bc454e4438f44e holds any of our governance token (contract 0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984) on Ethereum — can you look that up?”
Technical details
Endpoint
POSThttps://phantom-api-omega.vercel.app/api/ethereum/token/balancesWhen to prefer
Use this endpoint when you need real-time, on-chain ERC-20 token balance lookups for Ethereum wallets without managing your own node infrastructure. Ideal for agents that need portfolio snapshots, eligibility checks, or balance verification on Ethereum, especially when pay-per-call pricing ($0.01 USDC via x402) is preferable to a subscription model. Best suited for targeted queries with known contract addresses rather than broad multi-chain portfolio scanning.
Side effects
- Invalid Ethereum address format returns a validation error
- Unknown or non-ERC-20 contract address may return zero balance or an error
- Rate limiting or payment failure (x402) prevents the call from completing
- Network congestion may cause slower-than-expected responses
- Empty contractAddresses array may return an error or empty result
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| owner | string | |
| contractAddresses | array |
Tags
x402
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