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ERC20 Token Balance Lookup
x402
ERC20 Token Balance Lookup is a paid API for AI agents from biosfera.46-62-215-147.sslip.io, paid per call via x402, $0.002/call, status down (last checked 2026-10-02).
Fetches the live ERC20 token balance of a wallet address on Base, Ethereum, Arbitrum, Optimism, or Polygon, returning both raw integer and decimal-adjusted amounts.
Price / call$0.002
Success—
StatusDown
How this service works
Use when you need the current ERC20 token balance of a wallet on Base, Ethereum, Arbitrum, Optimism or Polygon, fetched live via balanceOf eth_call. Returns raw integer balance and a decimal-adjusted amount.
Output
Returns the raw integer balance (as returned by the ERC20 balanceOf eth_call) and a human-readable decimal-adjusted amount for the specified wallet and token on the requested chain.
Example use cases
DeFi portfolio token balance check
“Check how many WETH tokens (contract 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2) the wallet 0xAb5801a7D398351b8bE11C439e05C5B3259aeC9B holds on Ethereum right now.”
Airdrop eligibility verification
“Can you look up whether wallet 0x1234567890abcdef1234567890abcdef12345678 has any of the token at contract 0xabcdef1234567890abcdef1234567890abcdef12 on Arbitrum, and if so how much in human-readable form?”
Automated treasury monitoring
“Fetch the current USDC balance (contract 0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174) for our treasury wallet 0xDeaDbeefdEAdbeefdEadbEEFdeadbeEFdEaDbeeF on Polygon so I can see if it needs topping up.”
Technical details
Endpoint
GEThttps://biosfera.46-62-215-147.sslip.io/o/erc20-balance?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a live, on-chain ERC20 token balance for any specific wallet on the five supported EVM chains (Base, Ethereum, Arbitrum, Optimism, Polygon). It is preferable when you need both raw integer and decimal-adjusted balance in a single call, or when you are already working within the x402 micropayment ecosystem. For native ETH/USDC balance on Base specifically, a sibling endpoint may be more appropriate.
Side effects
- Invalid wallet or token address format (must be 0x-prefixed 40 hex character address)
- Unsupported chain name provided (must be base, ethereum, arbitrum, optimism, or polygon)
- Token contract address is not a valid ERC20 contract on the specified chain
- RPC or network timeout when querying the chain
- Payment failure or insufficient USDC balance for the $0.002 per-call fee
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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