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ERC-20 Token Balance Lookup
x402
ERC-20 Token Balance Lookup is a paid API for AI agents from chain.openverbs.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-29).
Returns the live ERC-20 token balance (raw and decimal-formatted) held by a wallet address on a specified EVM chain
Price / call$0.002
Success—
StatusUnknown
Output
Returns the wallet's raw token balance (as an integer in the token's smallest unit) plus a human-readable decimal-formatted amount using the token contract's own decimals, along with the token symbol. Data is read live from the on-chain contract with automatic RPC endpoint fallback for reliability.
Example use cases
DeFi portfolio token tracking
“Check how much USDC the wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 holds on Base — the USDC contract there is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.”
Token-gating eligibility check
“Does wallet 0xAb5801a7D398351b8bE11C439e05C5B3259aeC9B hold at least some LINK tokens on Ethereum? The LINK contract is 0x514910771AF9Ca656af840dff83E8264EcF986CA — grab their current balance.”
Cross-chain USDT balance comparison
“What's the USDT balance of wallet 0x3f5CE5FBFe3E9af3971dD833D26bA9b5C936f0bE on Polygon? USDT contract there is 0xc2132D05D31c914a87C6611C10748AEb04B58e8F.”
Technical details
Endpoint
POSThttps://chain.openverbs.com/v1/token-balance?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need the live, formatted ERC-20 token balance (not native ETH) for a specific wallet on an EVM chain. Prefer this over the native address balance endpoint when dealing with tokens like USDC, USDT, WETH, LINK, DAI, etc. Use the sibling token-metadata endpoint if you only need contract info (symbol, decimals, supply) without a specific holder's balance.
Side effects
- Invalid wallet address format (not a valid 0x hex address) returns a validation error
- Invalid token contract address returns an error or zero balance if the contract does not implement ERC-20
- Unsupported chain name returns a validation error — must be one of ethereum, base, arbitrum, optimism, polygon
- Contract read failure due to RPC outage across all fallback endpoints returns a service error
- Non-ERC-20 contract address (e.g. EOA or non-token contract) may return zero or an error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| chain | string | EVM chain to query. One of: ethereum, base, arbitrum, optimism, polygon. Default "ethereum". |
| token | string | ERC-20 token contract address. |
| address | string | Holder wallet address. |
Tags
x402
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