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Delx Commerce X402 Timeout Check
x402
Delx Commerce X402 Timeout Check is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-01).
Validates whether a given timestamp pair satisfies the X402 payment protocol timeout window, returning lead seconds and pass/fail status.
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 containing the computed lead_seconds between now and expiry, a within_window boolean indicating pass or fail, the minimum and maximum lead second bounds, a top-level status field ('pass' or 'fail'), and an evidence block with a SHA256 hash of the input and confirmation that no data was retained and no external calls were made.
Example use cases
Pre-flight x402 payment validity check
“Before I submit this x402 USDC payment, check if my current epoch 1720000000 is still within the window that expires at epoch 1720000600, requiring at least 30 seconds of lead time.”
Agent payment orchestration guard
“My agent is about to fulfill an x402 request — current time is epoch 1719999900, the authorization expires at epoch 1720000200, and the minimum lead required is 60 seconds. Tell me if we're still inside the valid window.”
Debugging expired x402 transaction
“An x402 payment failed and I want to know why — the current epoch was 1720001000, the expiry was 1720000800, and the minimum lead was 30 seconds. Check whether the timeout window was violated.”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/x402-timeout-check?utm_source=zero.xyzWhen to prefer
Use this endpoint when your agent needs a verifiable, auditable check of x402 payment timeout compliance — especially when you need cryptographic evidence (input SHA256) that the check was performed without data retention or external calls. Prefer this over local timestamp math when auditability, tamper-evidence, or compliance with the x402 protocol specification matters.
Side effects
- Missing required fields (now_epoch, expires_epoch, minimum_lead_seconds) result in validation error
- Non-integer epoch values cause type error
- Epoch values far outside realistic range may cause overflow behavior
- Payment failure or network error on the x402 micropayment layer prevents the call from completing
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| now_epoch | integer | Now Epoch supplied to X402 Timeout Check; used only for this bounded calculation and processed in memory without retention. |
| expires_epoch | integer | Expires Epoch supplied to X402 Timeout Check; used only for this bounded calculation and processed in memory without retention. |
| minimum_lead_seconds | integer | Minimum Lead Seconds supplied to X402 Timeout Check; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"lead_seconds": 300,
"within_window": true,
"maximum_lead_seconds": 9223372036854776000,
"minimum_lead_seconds": 30
},
"schema": "delx/util-x402-timeout-check/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "1199b0cc2c5f6a7de14c3b13bef25ae15b4a34f6c7c5ba48af83021cc95cbfac",
"external_calls": 0
},
"operation": "delivery_contract:x402_timeout_check"
}
}Tags
x402
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