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HALOWERK x402werk — Settlement Transaction Verifier
x402
HALOWERK x402werk — Settlement Transaction Verifier is a paid API for AI agents from x402.netzhandwerker.de, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-15).
Verifies that a blockchain settlement transaction matches expected payment parameters (recipient, token, amount) across multiple EVM chains.
Price / call$0.002
Success—
StatusUnknown
How this service works
HALOWERK x402werk — bezahlte Endpunkte nach x402. Preise in USDC auf Base Mainnet.
Output
Returns a verification object indicating whether the transaction exists on the specified chain, and boolean match flags for whether the recipient address (pay_to), token asset, and transferred amount align with the expected values provided in the request. If optional fields like asset or amount_units are omitted, the corresponding match fields are returned as null.
Example use cases
Confirm x402 micropayment before serving content
“Before I unlock this API response, verify that the settlement transaction 0x4f2a...8c91 on Base actually paid 2000 USDC units to my address 0x742d35Cc6634C0532925a3b844Bc454e4438f44e using the USDC contract 0xA0b8...eB48.”
Audit a DeFi payment on Arbitrum
“Check whether the Arbitrum One transaction 0x9b3e...f112 correctly transferred the expected amount to 0x1234...abcd — I need to know if the amount and recipient both match before I mark this invoice as paid.”
Validate cross-chain settlement in automated workflow
“I just received a payment claim on Polygon — can you verify that tx hash 0xde4f...7721 on the matic chain actually went to 0xSeller...5678 for at least 500000 token units so my workflow can proceed?”
Technical details
Endpoint
POSThttps://x402.netzhandwerker.de/settlement/verifyWhen to prefer
Use this endpoint when you need to programmatically confirm that an on-chain EVM payment transaction settled correctly against specific expected parameters — particularly in x402-based payment flows where you must validate a settlement tx hash before releasing a resource or continuing a workflow. Prefer this over manual block explorer lookups when automating payment verification across Base, Arbitrum, Ethereum, Polygon, Optimism, Avalanche, or their testnets.
Side effects
- Invalid or malformed tx_hash (not a valid 0x-prefixed 64-char hex) returns validation error
- Unrecognized chain identifier returns error
- Transaction not yet indexed or not found on chain returns not-found error
- Mismatch between expected and actual recipient, asset, or amount returns false match flags rather than an error
- Network or RPC timeout for the specified chain returns a service error
- pay_to address missing (required field) returns a 400-level error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| chain | string | Chain of the transaction, as CAIP-2 ("eip155:8453"), as a short name ("base") or as the chain id ("8453"). |
| tx_hash | string | Hash of the settlement transaction. |
| expected | object |
Tags
x402
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