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Delx Commerce X402 Refund Deadline Check
x402
Delx Commerce X402 Refund Deadline Check is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-02).
Checks whether a payment settlement falls within the allowable refund window by comparing timestamps against a specified window duration.
Price / call$0.001
Success—
StatusUnknown
How this service works
Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.
Output
Returns a JSON object indicating whether the settlement falls within the refund window (within_window boolean), the number of elapsed seconds between request and settlement, a pass/fail status, and a verifiable evidence object containing the SHA-256 hash of the inputs and confirmation that no data was retained or external calls were made.
Example use cases
Validate live payment refund eligibility
“A customer just disputed a charge — the payment was requested at epoch 1719990000, settled at epoch 1719993600, and our refund window is 3600 seconds. Can you check whether we're still within the deadline to issue a refund?”
Automated refund gate in agent workflow
“Before my agent triggers a refund, check if the x402 transaction requested at epoch 1720100000 and settled at epoch 1720101800 is within our 1800-second refund window, and tell me the exact elapsed time.”
Audit historical settlement timing
“I want to verify whether a batch of settlements were refundable at the time they were flagged — start with this one: requested at epoch 1718500000, settled at epoch 1718504000, window was 3600 seconds. Was it within the deadline?”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/x402-refund-deadline-check?utm_source=zero.xyzWhen to prefer
Use this endpoint when building x402-protocol payment flows that require deterministic, verifiable refund-window enforcement without storing sensitive data. It is ideal for AI agents that need a tamper-evident, in-memory-only calculation with an auditable SHA-256 input hash — suitable for compliance checks, automated dispute resolution gates, or settlement audits within the x402 ecosystem.
Side effects
- Missing required fields (window_seconds, settled_at_epoch, requested_at_epoch) return validation errors
- Invalid epoch values (negative, non-integer, or future settled_at before requested_at) may produce unexpected results
- settled_at_epoch earlier than requested_at_epoch could produce negative elapsed times
- Network or payment gateway failures preventing the $0.001 USDC fee from being processed block the request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| window_seconds | integer | Window Seconds supplied to X402 Refund Deadline Check; used only for this bounded calculation and processed in memory without retention. |
| settled_at_epoch | integer | Settled At Epoch supplied to X402 Refund Deadline Check; used only for this bounded calculation and processed in memory without retention. |
| requested_at_epoch | integer | Requested At Epoch supplied to X402 Refund Deadline Check; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"within_window": true,
"elapsed_seconds": 3600
},
"schema": "delx/util-x402-refund-deadline-check/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "75b029c9b2e724be9e810d27a39f2fd8a936b5f84bafd8c79078d3272448753c",
"external_calls": 0
},
"operation": "delivery_contract:x402_refund_deadline_check"
}
}Tags
x402
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