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x402.fuchss.app — x402 Payment Trace
x402
x402.fuchss.app — x402 Payment Trace is a paid API for AI agents from x402.fuchss.app, paid per call via x402, $0.011673/call, status unknown (last checked 2026-09-14).
Traces and decodes an on-chain USDC payment transaction to verify it was a valid x402 protocol settlement, returning compliance and settlement details.
Price / call$0.011673
Success—
StatusUnknown
How this service works
Know before you pay: deterministic trust scores (0-100) for 100,000+ x402 endpoints, backed by continuous probes and on-chain settlement data.
Output
Returns a structured object with on-chain payment trace data including x402 envelope compliance status, verified settlement amount in USDC, matched resource URL, network details, and any detected anomalies or protocol violations for the given transaction.
Example use cases
Example prompt
“Can you trace this x402 payment transaction for me — the hash is 0xabc123...def456 on base-mainnet — and confirm it was a valid settlement for https://api.example.com/my-resource?”
Technical details
Endpoint
POSThttps://x402.fuchss.app/v1/x402-payment-traceWhen to prefer
Use this endpoint when you need to verify or audit a specific on-chain USDC transaction to confirm it was a legitimate x402 protocol payment — for example, to reconcile payments, investigate disputes, or validate that a particular tx hash corresponds to a specific API resource. Prefer this over generic blockchain explorers when you need x402-specific compliance and envelope validation rather than raw transaction data.
Side effects
- Invalid or malformed txHash returns a 4xx error
- Transaction not found on specified network returns not-found error
- Transaction exists but is not an x402 payment returns non-compliant result
- Network slug mismatch causes lookup on wrong chain
- Service itself costs $0.017624 USDC per call via x402 — missing payment returns 402
- hintResource URL mismatch flagged in response but not a hard failure
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| txHash | string | |
| network | string |
Output
Schema · Response
{
"type": "json",
"example": {
"model": "llama-3.3-70b",
"route": {
"knownTo": [
"cdp"
],
"reseller": "x402.fuchss.app",
"x402Resource": "https://x402.fuchss.app/v1/x402-trust",
"ourLedgerMatch": true
},
"trace": {
"txHash": "0x384c5adf64e87fadc0b176005c49051cdc192d5c28b0158c05c3e9251a01d556",
"gasUsed": "85000",
"blockNumber": 12345678
},
"txHash": "0x384c5adf64e87fadc0b176005c49051cdc192d5c28b0158c05c3e9251a01d556",
"network": "base-mainnet",
"payment": {
"payee": "0xbBECBE90F28632a9d52ed67b33b43767b8c89285",
"payer": "0x1e82de8B9d2b12b86b2E11EAC29A36140543C451",
"token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"settled": true,
"amountUsd": "0.005",
"selectorUsed": "transferWithAuthorization"
}
}
}Tags
x402
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