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Delx Base Payment Deadline Check
x402
Delx Base Payment Deadline 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 whether a payment deadline epoch falls within an acceptable lead-time window relative to a given current epoch.
Price / call$0.001
Success—
StatusUnknown
How this service works
Base Payment Deadline Check: Base Payment Deadline Check checks a Base payment deadline against minimum and maximum lead time from bounded caller-supplied values without an external provider. Call Base Payment Deadline Check before signing, submitting, replacing, or accepting an EVM/Base transaction assembled from caller-owned data. Returns normalized transaction evidence, calculated budget or shape findings, and a fail-closed preflight status for Base Payment Deadline Check as versioned determ…
Output
Returns a JSON object with the computed lead_seconds between now and the deadline, a within_window boolean indicating whether the lead time falls between minimum and maximum bounds, echoed maximum and minimum lead seconds, a pass/fail status, and an evidence block confirming no data retention and zero external calls.
Example use cases
EVM payment preflight validation
“I'm about to submit a payment on Base — can you check if the deadline epoch 1718010000 is valid given the current epoch is 1718009500, with a minimum lead time of 30 seconds and a maximum of 7200 seconds?”
Reject stale or premature payment deadline
“Before executing this on-chain transaction, verify the deadline epoch 1718050000 against now at epoch 1718048000 — I need at least 60 seconds lead and no more than 1800 seconds.”
Agent batch payment timing guard
“My agent is processing a queue of Base payments — check if deadline epoch 1718100300 is within window right now at epoch 1718100000, with minimum lead 30 and maximum lead 900 seconds, so I know whether to proceed or reject.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/base-payment-deadline-checkWhen to prefer
Use this endpoint when you need a lightweight, stateless, zero-retention preflight check on payment deadline timing for Base/EVM x402 payment workflows. Prefer this over custom logic when you need a governed, auditable check with sha256 input evidence and explicit within_window semantics, especially inside autonomous agent pipelines where verifiability matters.
Side effects
- Missing required fields (now_epoch, deadline_epoch) result in validation errors
- Deadline epoch in the past yields negative lead_seconds and within_window false
- Lead seconds outside min/max bounds returns within_window false with status fail
- Non-integer epoch values may cause schema validation rejection
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| now_epoch | integer | Now Epoch supplied to Base Payment Deadline Check; used only for this bounded calculation and processed in memory without retention. |
| deadline_epoch | integer | Deadline Epoch supplied to Base Payment Deadline Check; used only for this bounded calculation and processed in memory without retention. |
| maximum_lead_seconds | integer | Maximum Lead Seconds supplied to Base Payment Deadline Check; used only for this bounded calculation and processed in memory without retention. |
| minimum_lead_seconds | integer | Minimum Lead Seconds supplied to Base Payment Deadline 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": 3600,
"minimum_lead_seconds": 30
},
"schema": "delx/util-base-payment-deadline-check/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "59c678732bd73042e4f51cbf240f3f49ced22b5675207daf3f54360d261c4acb",
"external_calls": 0
},
"operation": "evm_preflight:base_payment_deadline_check"
}
}Tags
x402
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