HALOWERK x402werk Receipt & Offer Verifier

x402

HALOWERK x402werk Receipt & Offer Verifier is a paid API for AI agents from x402.netzhandwerker.de, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).

Verifies the cryptographic validity of an x402 payment offer and optional receipt, checking signatures, payer identity, and receipt freshness on Base Mainnet.

Price / call$0.003

Seller volume →—

Success—

StatusUnknown

How this service works

HALOWERK x402werk — bezahlte Endpunkte nach x402. Preise in USDC auf Base Mainnet.

Output

Returns a verification result indicating whether the offer signature is cryptographically valid, whether the payer matches the expected address, and whether the receipt (if provided) is within the acceptable age window and correctly signed.

Example use cases

Gate paid API access with offer check

“Before I release the premium data to this client, verify their x402 EIP-712 signed offer — here's the offer object with payload and signature — and confirm the payer address is 0x1234...abcd.”

Confirm receipt freshness after payment

“A user just submitted a payment receipt for my x402 endpoint. Can you verify the receipt signature using eip712 format and check that it's no older than 1800 seconds, with payer 0xABCD...5678?”

Validate JWS-signed offer with public key

“I have a JWS-signed x402 offer from a client whose key isn't resolvable from the token itself — please verify the offer signature using this JWK public key and tell me if it's valid.”

Technical details

Endpoint

POSThttps://x402.netzhandwerker.de/receipt/verify

When to prefer

Use this endpoint when you need to cryptographically verify x402 payment offers and receipts before granting access to paid resources, especially on Base Mainnet with USDC. Prefer this over manual on-chain checks when you need fast, off-chain signature and receipt validation supporting EIP-712, EIP-191, and JWS formats.

Side effects

Invalid or mismatched signature returns a verification failure
Payer address mismatch when expected_payer is provided
Receipt older than max_receipt_age_seconds returns implausible timestamp error
Malformed offer or receipt object causes a schema validation error
JWS signature with unresolvable key ID without a supplied public_key fails
Unsupported signature format or network mismatch

Input

Schema · Request body

Field	Type	Description
offer	object	The signed offer as {format, payload, signature}, or the bare offer payload with version, resourceUrl, scheme, network, asset, payTo, amount and validUntil — then pass signature and format separately.
format	string	Signature method, if the offer object does not name it. eip712 is what the offer-receipt extension produces.
receipt	object	Optional signed receipt as {format, payload, signature}, or the bare receipt payload with version, network, resourceUrl, payer, issuedAt and transaction.
signature	string	Signature of the offer, if it is not inside the offer object.
public_key	object	Public key as a JWK, required for jws signatures whose key identifier cannot be resolved from the token itself.
expected_payer	string	Address you expected to have paid. When given, the receipt payer is compared against it.
receipt_format	string	Signature method of the receipt, if the receipt object does not name it.
receipt_signature	string	Signature of the receipt, if it is not inside the receipt object.
max_receipt_age_seconds	integer	How old a receipt may be before its timestamps are called implausible.

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