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Base Mainnet Wallet Balance Checker
x402
Base Mainnet Wallet Balance Checker is a paid API for AI agents from x402-seller.onrender.com, paid per call via x402, $0.012/call, status unknown (last checked 2026-09-15).
Returns the live ETH (and optionally ERC20 token) balance for a given wallet address on Base mainnet, sourced from Base's official public RPC.
Price / call$0.012
Success—
StatusUnknown
How this service works
Check a wallet's live balance on Base mainnet: native ETH (e.g. to confirm it has enough for gas) plus an optional ERC20 token balance (e.g. USDC) when a token contract address is supplied. Sourced from Base's official public RPC.
Output
A JSON object containing the wallet address, network identifier ('base'), the native ETH balance as a number, an optional token balance object (if a token contract address was provided), and the RPC source string.
Example use cases
Example prompt
“What's the current ETH balance on Base mainnet for wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045, and can you also check its USDC balance using the token contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913?”
Technical details
Endpoint
GEThttps://x402-seller.onrender.com/chain/balanceWhen to prefer
Use this endpoint when you need a real-time, on-chain wallet balance specifically on Base mainnet — including both native ETH and any ERC20 token. Prefer it over general-purpose blockchain explorers when you need a simple, paid, low-latency lookup with a clean JSON response and no API key setup beyond x402 payment.
Side effects
- Invalid or malformed wallet address returns an error
- Invalid ERC20 token contract address causes token balance lookup to fail
- RPC node unavailability returns a 5xx error
- Rate limiting or payment failure returns a 402 or 429 response
- Address with zero balance returns 0 rather than an error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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