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x402engine Wallet Balance Lookup
x402
x402engine Wallet Balance Lookup is a paid API for AI agents from x402engine.app, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-01).
Returns token balances for a given wallet address on a specified blockchain (EVM, Solana, Bitcoin, 20+ chains)
Price / call$0.005
Success—
StatusUnknown
How this service works
Token balances for any wallet across 20+ chains — EVM, Solana, Bitcoin
Output
Returns token balance data for the specified wallet address on the requested chain, including token names, amounts, and potentially contract addresses or decimals for each held token.
Example use cases
DeFi portfolio tracker check
“Can you look up all the token balances for my wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Polygon so I can see what I'm holding?”
On-chain agent payment verification
“Before processing this order, check if wallet 0xABC123...def on Base has any USDC balance to confirm they can pay.”
Solana airdrop eligibility check
“Check the token balances for Solana wallet 9WzDXwBbmkg8ZTbNMqUxvQRAyrZzDsGYdLVL9zYtAWWM to see if it qualifies for the airdrop.”
Technical details
Endpoint
POSThttps://x402engine.app/api/wallet/balances?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need real-time on-chain token balance data for a specific wallet address on one of 20+ supported chains including EVM-compatible chains (Ethereum, Polygon, Base, Arbitrum), Solana, and Bitcoin. Prefer this over blockchain RPC calls when you want a simple, pay-per-use abstraction without managing node infrastructure or API keys.
Side effects
- Invalid or malformed wallet address returns an error
- Unsupported chain name returns an error or empty result
- Network timeouts for congested chains
- Address with zero balance returns empty token list
- Incorrect address format for the specified chain (e.g. EVM address on Solana)
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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