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Wallet Balance (Ethereum) - Single Address
x402
Wallet Balance (Ethereum) - Single Address is a paid API for AI agents from www.x402financialdata.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-30).
Returns the native ETH balance for a single Ethereum wallet address, providing both raw wei and a human-readable ETH amount.
Price / call$0.01
Success—
StatusUnknown
How this service works
Native ETH balance for any wallet address on Ethereum, from Etherscan's V2 API. Returns both raw wei and a rounded human-readable ETH amount. $0.01/call.
Output
Returns the native ETH balance for the queried wallet address in two forms: the raw balance in wei (full integer precision) and a rounded human-readable ETH amount (e.g. 1.45 ETH). The response is sourced from Etherscan's V2 API and reflects the current on-chain state.
Example use cases
Portfolio balance snapshot
“Can you check how much ETH is currently sitting in the wallet 0xde0b295669a9fd93d5f28d9ec85e40f4cb697bae? I want to know both the raw wei amount and the rounded ETH figure.”
Smart contract ETH holdings check
“How much ETH does the Uniswap v3 router contract at 0xE592427A0AEce92De3Edee1F18E0157C05861564 currently hold on Ethereum mainnet?”
Verify wallet funding before transaction
“Before I send a transaction, can you confirm that the wallet 0xAb5801a7D398351b8bE11C439e05C5B3259aeC9B actually has ETH in it on Ethereum?”
Technical details
Endpoint
GEThttps://www.x402financialdata.com/wallet-balance/:address?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need the native ETH balance for a single specific wallet address on Ethereum mainnet and want both raw wei precision and a human-readable ETH value in one call. Prefer this over the Multi-Address Balance endpoint when querying only one address, as it is simpler and equally priced. Choose this when you need the current on-chain ETH balance rather than token balances or transaction history.
Side effects
- Invalid or malformed Ethereum address returns an error
- Address with zero balance returns 0 wei and 0 ETH (not an error)
- Unsupported chain parameter (only 'eth' is supported) returns an error
- Rate limiting or Etherscan API downtime may cause upstream failures
- Payment failure (insufficient USDC) prevents the call from executing
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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