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Base Transaction Explainer & x402 Payment Verifier
x402
Base Transaction Explainer & x402 Payment Verifier is a paid API for AI agents from kr-x402-mvp.kgy5612.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-31).
Decodes a Base chain transaction hash into human-readable details including transfers, gas, method called, and USDC payment verification for x402 settlement confirmation.
Price / call$0.002
Success—
StatusUnknown
How this service works
Pay-per-call crypto microdata for trading/onchain AI agents via x402 (USDC on Base): Base gas, token risk, balances, multi-venue prices, Hyperliquid book/funding, kimchi premium. No API keys.
Output
Returns a JSON object with: transaction hash, block number, chain, decoded method name (e.g. 'aggregate3 (Multicall3)'), status (success/fail), gas used, fee in ETH, timestamp, all token transfers (from/to/token/amount/symbol), ETH value, confirmation count, a usdc_received map keyed by recipient address, payment_verified boolean, and is_x402_settlement boolean flag.
Example use cases
Verify x402 micropayment settled
“Check Base tx 0x3ea6d07f7e990ba4c2289487cd12ea41b6e13b48518fa38b24de2afd1df1d8ca and confirm it was a valid x402 settlement where at least 0.002 USDC landed at 0xe4be4d0bd82d8e68203deff81f79ede0529f2617.”
Audit onchain USDC transfer
“Decode this Base transaction hash 0x3ea6d07f7e990ba4c2289487cd12ea41b6e13b48518fa38b24de2afd1df1d8ca for me — I need to know the sender, receiver, USDC amount transferred, gas used, and whether it succeeded.”
Debug failed payment confirmation
“My agent just submitted a Base tx with hash 0x3ea6d07f7e990ba4c2289487cd12ea41b6e13b48518fa38b24de2afd1df1d8ca but I'm not sure it went through — can you check the status, number of confirmations, and whether any USDC was actually transferred?”
Technical details
Endpoint
GEThttps://kr-x402-mvp.kgy5612.workers.dev/v1/tx-explain?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to verify or audit a specific Base chain transaction — especially to confirm x402 USDC micropayment settlement before granting access to a resource. Prefer this over generic block explorers when you need structured, machine-readable output with explicit payment_verified and is_x402_settlement flags that an AI agent can act on directly.
Side effects
- Invalid or malformed hash (not matching ^0x[0-9a-fA-F]{64}$) returns 400 error
- Transaction not found on Base returns 404 or empty result
- expect_to or expect_usdc mismatch causes payment_verified to return false
- Network timeout or RPC issues may cause delayed or failed responses
- Non-Base chain transaction hashes will not resolve correctly
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"to": "0xca11bde05977b3631167028862be2a173976ca11",
"from": "0xc6699d2aada6c36dfea5c248dd70f9cb0235cb63",
"hash": "0x3ea6d07f7e990ba4c2289487cd12ea41b6e13b48518fa38b24de2afd1df1d8ca",
"block": 53220068,
"chain": "base",
"method": "aggregate3 (Multicall3)",
"status": "success",
"fee_eth": 6.5e-7,
"gas_used": 92312,
"timestamp": "2026-10-28T23:18:03Z",
"transfers": [
{
"to": "0xe4be4d0bd82d8e68203deff81f79ede0529f2617",
"from": "0xa1d1c0cf717402ff3651aa4873ccf96410b01978",
"token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": 0.002,
"symbol": "USDC"
}
],
"value_eth": 0,
"confirmations": 21764,
"usdc_received": {
"0xe4be4d0bd82d8e68203deff81f79ede0529f2617": 0.002
},
"payment_verified": true,
"is_x402_settlement": true
}
}Tags
x402
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