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Native ETH Balance on Base
x402
Native ETH 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).
Returns the native ETH balance of a given wallet address on the Base blockchain, in both wei and ether, read directly from a node.
Price / call$0.001
Success—
StatusUnknown
How this service works
Read the native ETH balance of an address on Base. POST {"address":"0x..."} and receive the balance in wei and in ether. Live chain state read directly from a node, with no indexer lag and no API key.
Output
Returns a JSON object containing the queried address's native ETH balance expressed as a raw integer in wei and as a human-readable decimal in ether, reflecting live on-chain state with no indexer lag.
Example use cases
Pre-transaction ETH sufficiency check
“Before I send a transaction, check whether 0xAb5801a7D398351b8bE11C439e05C5B3259aeC9B has enough ETH on Base to cover gas — tell me the balance in both wei and ether.”
Portfolio dashboard balance fetch
“I'm building a dashboard — can you pull the native ETH balance on Base for 0x742d35Cc6634C0532925a3b844Bc454e4438f44e and show me the ether amount?”
Wallet monitoring alert baseline
“What's the current ETH balance of 0x4838B106FCe9647Bdf1E7877BF73cE8B0BAD5f97 on Base right now? I want to record the baseline before I start watching for changes.”
Technical details
Endpoint
POSThttps://x402-echo-service.onrender.com/chain/eth-balanceWhen to prefer
Choose this endpoint when you need a real-time, live chain read of a wallet's native ETH balance on Base with no API key required and no risk of indexer lag. Prefer it over block explorer APIs when freshness is critical, or when you want a simple one-field POST without authentication overhead.
Side effects
- Invalid or malformed Ethereum address returns an error response
- Address not found on Base (zero balance returned, not an error)
- Node connectivity issues may cause timeouts or 5xx errors
- Payment failure (402) if USDC payment is not attached or insufficient
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| address | string |
Tags
x402
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