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Base Wallet Snapshot – ETH, USDC, Nonce & Gas Check
x402
Base Wallet Snapshot – ETH, USDC, Nonce & Gas Check is a paid API for AI agents from kr-x402-mvp.kgy5612.workers.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-31).
Returns a one-call snapshot of a Base wallet: native ETH balance, USDC balance, nonce, live ERC-20 transfer gas cost, and boolean flags indicating whether the wallet can pay gas and x402 micropayments.
Price / call$0.003
Success—
StatusUnknown
How this service works
Pay-per-call crypto microdata for trading/onchain AI agents via x402 (USDC on Base): Base gas, token risk, balances, multi-venue prices, Hyperliquid book/funding, kimchi premium. No API keys.
Output
A JSON object containing: ETH native balance, USDC token balance, chain (always 'base'), account nonce, live gas cost in ETH for a standard ERC-20 transfer, a can_pay_gas boolean (true if ETH covers gas), and a can_pay_x402 boolean (true if USDC balance covers the x402 fee). All values are current at time of call.
Example use cases
Pre-payment counterparty wallet check
“Before I pay out to 0xe4be4d0bd82d8e68203deff81f79ede0529f2617, check if that wallet is properly funded — does it have ETH for gas and any USDC balance on Base?”
Agent self-check before on-chain action
“Check my agent wallet 0xabc1234567890abcdef1234567890abcdef1234 — does it have enough ETH to cover gas for an ERC-20 transfer and can it handle x402 micropayments right now?”
Monitor wallet readiness for automated payments
“Pull a quick snapshot of wallet 0xdeadbeefdeadbeefdeadbeefdeadbeefdeadbeef on Base and tell me its ETH balance, USDC balance, current nonce, and whether it's ready to pay gas.”
Technical details
Endpoint
GEThttps://kr-x402-mvp.kgy5612.workers.dev/crypto/wallet-snapshot?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a combined ETH balance + USDC balance + nonce + gas cost check for a Base wallet in a single call. It is cheaper ($0.003) than calling separate eth-balance, erc20-balance, and gas oracle endpoints individually (which would cost $0.006+). Ideal for agent self-checks before executing on-chain actions, or for verifying a payee wallet is funded before initiating a transfer. Not suitable if you need balances on chains other than Base, or need detailed ERC-20 token lists beyond USDC.
Side effects
- Invalid or malformed wallet address (not matching ^0x[0-9a-fA-F]{40}$) returns a 400 error
- Wallet address not found on Base returns zero balances (valid response, not an error)
- RPC or node timeout may cause delayed or failed responses
- Payment not sent or insufficient x402 payment returns 402 before data is served
- Network congestion may cause gas cost estimates to be stale by seconds
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"eth": 0,
"usdc": 0.079,
"chain": "base",
"nonce": 0,
"wallet": "0xe4be4d0bd82d8e68203deff81f79ede0529f2617",
"can_pay_gas": false,
"can_pay_x402": true,
"gas_cost_erc20_transfer_eth": 4e-7
}
}Tags
x402
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