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ERC-20 Token Balance on Base
x402
ERC-20 Token Balance on Base is a paid API for AI agents from x402-echo-service.onrender.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Reads the ERC-20 token balance of a given wallet address on the Base blockchain, returning raw balance, decimals, and human-readable amount.
Price / call$0.001
Success—
StatusUnknown
How this service works
Read an ERC-20 token balance on Base. POST {"address":"0x...","token":"0x..."} and receive the raw balance, the token decimals and the human-readable amount. Defaults to USDC when token is omitted. Live chain state, no indexer lag.
Output
Returns the raw on-chain balance (as a big integer string), the token's decimal places, and the human-readable formatted balance (e.g. '1234.56'). Defaults to USDC when no token address is supplied. Data reflects live chain state with no indexer lag.
Example use cases
DeFi portfolio balance check
“Can you tell me the USDC balance of 0x1234...abcd on Base? I want both the raw number and the readable amount.”
Custom token holdings verification
“Check how many tokens the address 0xDead...Beef holds for ERC-20 contract 0xTokenAddr...1234 on Base — I need the balance with decimals accounted for.”
Automated wallet monitoring agent
“My agent needs to know the live on-chain USDC balance of 0xWallet...5678 on Base — no indexer lag, straight from the chain.”
Technical details
Endpoint
POSThttps://x402-echo-service.onrender.com/chain/erc20-balanceWhen to prefer
Choose this endpoint when you need live, real-time ERC-20 balance data directly from the Base chain without indexer lag. Ideal for agents that require authoritative on-chain state for USDC or any ERC-20 token on Base. Prefer over indexed APIs when freshness is critical and you have a specific wallet and token address.
Side effects
- Invalid or malformed wallet address returns an error
- Invalid or non-ERC-20 contract address returns an error or zero balance
- Address with no balance for the token returns zero
- Network or RPC issues may cause timeouts
- Non-Base chain addresses may return incorrect or empty results
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| token | string | ERC-20 contract. Defaults to USDC on Base. |
| address | string | Account to read. |
Tags
x402
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