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EVM Wallet Balance & x402 Payment Readiness Checker
x402
EVM Wallet Balance & x402 Payment Readiness Checker is a paid API for AI agents from gpt55.558686.xyz, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Reads a public EVM wallet's USDC and native gas balance on Base or Ethereum and determines whether it can cover a $0.001 x402 payment, returning a funding-readiness snapshot with runway and shortfall details.
Price / call$0.001
Success—
StatusUnknown
How this service works
Read a public EVM wallet balance on Base or Ethereum and determine whether its Base USDC balance can cover a suggested $0.001 x402 payment. Returns a coherent provider snapshot, USDC runway, shortfall, native-gas presence, and a handoff to the full funding-readiness doctor without signing, broadcasting, or handling private keys. Balance-only readiness does not prove client, signing, spend-cap, or retry capability. GET variant for agents, crawlers, and wallets that prefer query parameters over...
Output
Returns a provider snapshot including the wallet's Base USDC balance, native gas presence, USDC runway (how many $0.001 payments can be made), shortfall if the balance is insufficient, overall payment readiness verdict, and a pointer to a full funding-readiness diagnostic. Does not sign transactions, broadcast anything, or touch private keys.
Example use cases
Pre-flight check before paid API call
“Before my agent makes an x402 API call, check if wallet 0xAbC1234567890abcdef1234567890abcdef123456 on Base has enough USDC to cover the $0.001 fee and tell me if there's any shortfall.”
Agent wallet funding audit
“Can you look up the USDC and gas balance on Base for wallet 0xDEF9876543210fedcba9876543210fedcba987654 and tell me how many $0.001 x402 payments it could still make before running dry?”
Cross-chain wallet readiness comparison
“Check if my Ethereum mainnet wallet 0x1234567890abcdef1234567890abcdef12345678 has enough USDC for a $0.001 x402 payment and show me the full funding snapshot including gas status.”
Technical details
Endpoint
GEThttps://gpt55.558686.xyz/v1/tools/evm-wallet-balanceWhen to prefer
Use this endpoint when an agent or workflow needs to verify that a specific EVM wallet is funded with enough Base USDC to cover a $0.001 x402 micropayment before attempting the payment — especially in pre-flight checks, funding audits, or automated agent pipelines where signing and broadcasting are handled elsewhere. Prefer this over a general blockchain explorer when you specifically need x402 payment readiness framing with runway and shortfall calculations.
Side effects
- Invalid or malformed wallet address returns a validation error
- Unsupported chain/network value returns an enum error
- RPC or provider timeout may return an upstream error with no balance data
- Wallet with zero USDC returns a shortfall equal to the full payment amount
- Network congestion may cause stale or delayed balance reads
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"tool": "evmWalletBalance",
"address": "0x1111111111111111111111111111111111111111",
"chainId": "eip155:8453",
"network": "base",
"observedAt": "2026-08-10T00:00:00.000Z",
"blockNumber": "1234567",
"usdcBalance": {
"raw": "1234567",
"symbol": "USDC",
"decimals": 6,
"formatted": "1.234567",
"tokenAddress": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
},
"nativeBalance": {
"raw": "1000000000000000000",
"symbol": "ETH",
"decimals": 18,
"formatted": "1"
},
"x402Readiness": {
"shortfall": {
"atomic": "0",
"formatted": "0"
},
"assessment": "balance_ready",
"balanceOnly": true,
"limitations": [
"Balance signals do not prove payment-client, typed-data signing, spend-cap, or same-request retry readiness."
],
"nativeGasPresent": true,
"suggestedPayment": {
"asset": "USDC",
"network": "eip155:8453",
"amountUsd": "0.001",
"amountAtomic": "1000"
},
"walletNetworkMatches": true,
"fundingReadinessDoctor": {
"paidUrl": "https://gpt55.558686.xyz/v1/tools/x402-wallet-funding-readiness-doctor",
"guideUrl": "https://gpt55.558686.xyz/x402/wallet-funding-readiness-doctor"
},
"canCoverSuggestedX402Amount": true,
"usdcRunwayAtSuggestedAmount": "1234"
},
"rpcProviderHost": "rpc.example.test"
}
}Tags
x402
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