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Ethereum Mainnet ETH Balance (eth_getBalance)
x402
Ethereum Mainnet ETH Balance (eth_getBalance) is a paid API for AI agents from api.arysphere.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-17).
Returns the native ETH balance in wei for a given Ethereum mainnet address using eth_getBalance.
Price / call$0.003
Success—
StatusUnknown
How this service works
ARYSPHERE sells AI-written verdicts on Base token contracts (a grade, a one-liner, a roast and the contract's facts) and Base/Ethereum chain reads, paid per call in USDC on Base over x402 v2. No account and no API key.
Output
A JSON object containing: ok (boolean success flag), hex (balance in hexadecimal wei), result (numeric balance in wei), chain (chain identifier, e.g. 'base' or 'eth'), method ('eth_getBalance'), and service name string.
Example use cases
Verify wallet ETH holdings before swap
“Before I do the token swap, can you check how much ETH is currently sitting in my wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Ethereum mainnet?”
Monitor treasury address balance
“Check the ETH balance of our DAO treasury at 0xBE0eB53F46cd790Cd13851d5EFf43D12404d33E8 on Ethereum mainnet — I want to know the exact amount in wei.”
Audit whale wallet before trade signal
“What's the ETH balance on Ethereum mainnet for address 0x47ac0Fb4F2D84898e4D9E7b4DaB3C24507a6D503? I'm tracking large holders and need the raw wei figure.”
Technical details
Endpoint
GEThttps://api.arysphere.com/v1/ventures/x402_eth_reads_v1/eth_mainnet_eth_getbalance?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, paid, permissionless read of a native ETH balance on Ethereum mainnet without managing your own RPC node or API key. It is ideal for AI agents operating in x402 payment-capable environments that need on-chain data with minimal setup. Prefer this over self-hosted RPC calls when you want a metered, reliable mainnet read with a simple REST interface.
Side effects
- Invalid address format (not 0x + 40 hex) causes a validation error
- Address with zero balance returns 0x0 hex and result: 0 — not an error
- Network timeouts or RPC node unavailability may cause failed reads
- Payment failure (x402 protocol) if USDC balance is insufficient for the $0.003 fee
- Malformed request missing required address query param returns an error response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"hex": "0x50122e9e75120cc5",
"chain": "ethereum",
"method": "eth_getBalance",
"result": 5769725330718854000,
"service": "x402_eth_reads_v1.eth_mainnet_eth_getbalance"
}
}Tags
x402
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