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Crypto Microdata for Agents – /v1/explain (x402 Payment Verifier)
x402
Crypto Microdata for Agents – /v1/explain (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).
Verifies and decodes a Base blockchain transaction hash, confirming x402 USDC payment settlement and returning full transfer details including amounts, addresses, and confirmation count.
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 decoded transaction: to/from addresses, tx hash, block number, chain (base), contract method called, status (success/fail), gas used, ETH fee, timestamp, token transfer list (token address, symbol, amount, sender, recipient), ETH value, confirmation count, usdc_received map per address, payment_verified boolean, and is_x402_settlement boolean.
Example use cases
Confirm x402 micropayment before serving data
“Before I release the premium crypto data to this agent, check that tx hash 0x3ea6d07f7e990ba4c2289487cd12ea41b6e13b48518fa38b24de2afd1df1d8ca actually paid 0.002 USDC to my wallet 0xe4be4d0bd82d8e68203deff81f79ede0529f2617 and is flagged as a valid x402 settlement.”
Audit USDC transfer on Base chain
“Look up Base transaction 0x3ea6d07f7e990ba4c2289487cd12ea41b6e13b48518fa38b24de2afd1df1d8ca and tell me who sent USDC, how much, to which address, what block it landed in, and how many confirmations it has so far.”
Automated payment receipt validation for agent pipeline
“My trading agent just submitted a USDC payment — can you decode tx 0x3ea6d07f7e990ba4c2289487cd12ea41b6e13b48518fa38b24de2afd1df1d8ca on Base and confirm payment_verified is true and usdc_received is at least 0.002 before we proceed?”
Technical details
Endpoint
GEThttps://kr-x402-mvp.kgy5612.workers.dev/v1/explain?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent or automated service needs to verify that a specific Base blockchain transaction actually transferred the expected USDC amount to the expected payee — particularly in x402 pay-per-call flows where the server must confirm payment before releasing data. Prefer this over generic block explorers when you need a machine-readable JSON response with a clear payment_verified flag and x402 semantic tagging, without managing API keys.
Side effects
- Invalid tx hash format (must match ^0x[0-9a-fA-F]{64}$) returns 400 validation error
- Transaction not found on Base returns empty or 404 response
- Transaction pending/unconfirmed may return status other than success
- expect_to or expect_usdc mismatch returns payment_verified: false
- Network timeout if Base RPC is slow or congested
- Non-USDC transfer returns usdc_received as empty object
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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