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X402 Refund Receipt Check
x402
X402 Refund 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 2026-10-19).
Validates a caller-supplied x402 refund receipt by checking its identifier, amount, and status, returning acceptance or rejection with mismatch reasons and normalized evidence.
Price / call$0.001
Success—
StatusUnknown
How this service works
X402 Refund Receipt Check: X402 Refund Receipt Check checks caller-supplied refund receipt identifiers, amount, and status from bounded caller-supplied values without an external provider. Call X402 Refund 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 Refund Receipt Check as version…
Output
Returns a structured result containing contract-specific check outcomes, normalized evidence extracted from the receipt, a list of mismatch reasons if any discrepancies were found, and an explicit acceptance or rejection status verdict for the submitted refund receipt.
Example use cases
Guard against fraudulent refund receipts
“I just received a refund receipt from an x402 transaction — can you validate it and tell me if the identifier, amount, and status all check out, or if there are any mismatches I should know about before I accept it?”
Pre-acceptance check in agent payment pipeline
“My agent is about to complete a delivery that came with a refund receipt attached. Can you run a refund receipt check on it to make sure everything is legitimate before I greenlight the delivery?”
Audit historical refund receipt validity
“I have a batch of refund receipts from past x402 transactions and I want to verify one of them — can you check this specific receipt's status and amount for acceptance or rejection, and tell me the reasons if it gets rejected?”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/x402-refund-receipt-check?utm_source=zero.xyzWhen to prefer
Use this endpoint when operating in an x402 payment or agent delivery workflow and you need an in-memory, stateless validation of a refund receipt before accepting or paying. Prefer this over manual inspection when you need normalized evidence and explicit accept/reject verdicts without retaining any data externally. It is particularly useful when the receipt metadata is caller-supplied and potentially untrusted.
Side effects
- Receipt object exceeds 128 properties limit — request rejected
- Malformed or missing receipt field — validation cannot complete
- Ambiguous or unrecognizable receipt structure — mismatch reasons returned with rejection
- Upstream computation error — internal server error response
- Receipt with no recognizable identifier or amount fields — rejection with explanation
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| receipt | object | Receipt supplied to X402 Refund Receipt Check; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"receipt": {
"status": "queued",
"refund_id": "refund-1",
"amount_raw": "1000",
"payment_id": "pay-1"
},
"shape_valid": true,
"missing_fields": []
},
"schema": "delx/util-x402-refund-receipt-check/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "eed8a44348546c38e110e86becc0cf20609c4043c2d9579d6b2d25468d2f7566",
"external_calls": 0
},
"operation": "delivery_contract:x402_refund_receipt_check"
}
}Tags
x402
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