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Delx X402 Delivery Receipt Check
x402
Delx X402 Delivery Receipt Check is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Validates an X402 payment delivery receipt to confirm it is well-formed, contains required fields, and represents a successfully delivered payment.
Price / call$0.001
Success—
StatusUnknown
How this service works
X402 Delivery Receipt Check: X402 Delivery Receipt Check checks receipt fields for payment id, resource, amount, and delivery status from bounded caller-supplied values without an external provider. Call X402 Delivery Receipt Check before paying for or accepting an x402 or agent delivery assembled from caller-supplied challenge and result metadata. Returns contract-specific checks, normalized evidence, mismatch reasons, and an explicit acceptance or rejection status for X402 Delivery Receipt Ch…
Output
Returns a JSON object with a status field ('pass' or 'fail'), a shape_valid boolean, a list of missing_fields, an echo of the parsed receipt, and an evidence block containing a SHA-256 hash of the input, a retained flag (always false), and the count of external calls made (always 0). Also includes a schema identifier and operation name.
Example use cases
Pre-processing receipt gate for agents
“Before I mark this order as fulfilled, validate this x402 delivery receipt for me — I need to know if the shape is valid and whether delivered is true and no fields are missing.”
Debugging a malformed payment receipt
“I got this x402 receipt back from a payment and something looks off — can you run it through the receipt checker and tell me exactly which fields are missing or invalid?”
Auditing agent payment logs
“I have a batch of x402 receipts from my agent's payment history — can you validate this one receipt object and confirm it's properly formed with a payment_id and resource URL before I log it?”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/x402-delivery-receipt-checkWhen to prefer
Choose this endpoint when your agent needs to programmatically verify an X402 payment receipt before taking downstream action — especially in trustless or automated workflows where you cannot manually inspect receipts. It is preferable over custom validation logic because it runs in-memory with no data retention, returns a deterministic hash for audit trails, and makes zero external calls, making it safe for sensitive payment data.
Side effects
- Malformed receipt object missing required properties returns missing_fields list with status 'fail'
- Receipt object exceeding 128 properties is rejected due to maxProperties constraint
- Invalid JSON or non-object receipt body returns a parse or validation error
- Network timeout or service unavailability returns HTTP 5xx
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| receipt | object | Receipt supplied to X402 Delivery Receipt Check; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"receipt": {
"resource": "https://api.delx.ai/x402/utility/example",
"delivered": true,
"amount_raw": "1000",
"payment_id": "pay-1"
},
"shape_valid": true,
"missing_fields": []
},
"schema": "delx/util-x402-delivery-receipt-check/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "834990994a10325e5e595578ebbcf61447f6bc3ccd77c2008ce768f630056c28",
"external_calls": 0
},
"operation": "delivery_contract:x402_delivery_receipt_check"
}
}Tags
x402
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