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Base Chain Transaction Lookup & Verification
x402
Base Chain Transaction Lookup & Verification 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).
Fetches and verifies details of a Base blockchain transaction by hash, including transfer amounts, gas usage, USDC received, and x402 payment settlement status.
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 the full transaction record: to/from addresses, block number, chain, decoded method name, success/fail status, ETH fee, gas used, ISO timestamp, token transfer list (including symbol, amount, and addresses), ETH value, confirmation count, per-address USDC received map, a payment_verified boolean, and an is_x402_settlement boolean.
Example use cases
Confirm x402 micropayment settled
“Check if the Base transaction 0x3ea6d07f7e990ba4c2289487cd12ea41b6e13b48518fa38b24de2afd1df1d8ca actually settled as an x402 payment and that 0.002 USDC reached address 0xe4be4d0bd82d8e68203deff81f79ede0529f2617.”
Audit agent payment before proceeding
“Before I unlock the next step for my trading agent, verify that transaction 0x3ea6d07f7e990ba4c2289487cd12ea41b6e13b48518fa38b24de2afd1df1d8ca on Base succeeded and paid at least 0.002 USDC to the expected payee.”
Debug a failed onchain transfer
“I sent a transaction on Base with hash 0x3ea6d07f7e990ba4c2289487cd12ea41b6e13b48518fa38b24de2afd1df1d8ca but I'm not sure it went through — can you check the status, gas used, and what tokens were transferred?”
Technical details
Endpoint
GEThttps://kr-x402-mvp.kgy5612.workers.dev/api/chain/transaction?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent needs to programmatically verify that a specific Base blockchain transaction occurred, succeeded, and transferred the correct USDC amount to the correct address — especially for x402 payment settlement confirmation. Prefer this over a general block explorer when you need machine-readable JSON with decoded transfer amounts and a payment_verified flag rather than a human-readable UI.
Side effects
- Invalid or malformed tx hash (not matching 0x[64 hex chars] pattern) returns a 400 error
- Transaction not found on Base returns a 404 or empty response
- expect_to / expect_usdc mismatch causes payment_verified to return false rather than an error
- Network congestion or RPC node unavailability may cause timeouts
- Very recent transactions with zero confirmations may not yet be indexed
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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