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Wallet Profile Checker (x402)
x402
Wallet Profile Checker (x402) 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 comprehensive Base wallet profile including ETH balance, USDC balance, nonce, gas affordability, and x402 payment capability for a given wallet address.
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 with the wallet's ETH balance, USDC balance, chain name ('base'), nonce, boolean flags for gas affordability (can_pay_gas) and x402 payment capability (can_pay_x402), and the estimated gas cost in ETH for an ERC20 transfer.
Example use cases
Agent self-check before API call
“Check my agent wallet 0xe4be4d0bd82d8e68203deff81f79ede0529f2617 on Base — does it have enough ETH for gas and at least $0.003 USDC to cover an x402 API call?”
Counterparty wallet vetting
“I'm about to receive a crypto payment from 0xabc123...def456 — can you check their Base wallet profile to see if they actually have USDC and can cover gas for an ERC20 transfer?”
Onchain agent funding status
“My trading bot uses wallet 0xdeadbeef...1234 on Base. Pull its full wallet profile — ETH balance, USDC, nonce, and whether it can pay gas — so I know if I need to top it up before it runs tonight.”
Technical details
Endpoint
GEThttps://kr-x402-mvp.kgy5612.workers.dev/api/wallet-profile?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a one-call snapshot of a Base wallet's financial readiness — especially before initiating x402 micropayments, ERC20 transfers, or any onchain agent action. Prefer this over raw RPC calls when you need ETH balance, USDC balance, gas affordability, and x402 capability all at once without managing multiple blockchain queries or API keys.
Side effects
- Invalid or malformed wallet address (not matching 0x hex pattern) returns a 400 error
- Wallet with zero balances returns valid response but can_pay_gas=false and can_pay_x402=false
- Payment of 0.003 USDC via x402 required — insufficient USDC in calling wallet causes 402 rejection
- Network issues reaching Base RPC may result in timeout or 503
- Non-existent wallet (never used address) returns nonce=0 and zero balances
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
Reviews
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