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Delx EVM Deadline Check
x402
Delx EVM 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 2026-09-15).
Validates whether an EVM transaction deadline is still actionable given a current timestamp and minimum lead-time requirement.
Price / call$0.001
Success—
StatusUnknown
How this service works
EVM Deadline Check: EVM Deadline Check checks a transaction deadline against current time and minimum lead time from bounded caller-supplied values without an external provider. Call EVM 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 EVM Deadline Check as versioned deterministic JSON. Price: $0.001 USDC…
Output
Returns a JSON object with the computed lead_seconds (difference between deadline and now), a within_window boolean indicating if the deadline is still actionable given the minimum lead requirement, the minimum and maximum lead seconds bounds, a pass/fail status, and an evidence block confirming no data was retained and no external calls were made.
Example use cases
DeFi swap preflight timing check
“I'm about to execute a token swap on-chain with a deadline of epoch 1720005000. The current epoch is 1720004600. Can you check if there's still enough time — I need at least 120 seconds of lead time before the deadline?”
Automated agent transaction gating
“Before my agent submits this EVM transaction, verify the deadline epoch 1720100000 is still actionable given the current epoch 1720099800 and a minimum lead requirement of 90 seconds.”
Smart contract deadline validation pipeline
“I'm building a pipeline that validates EVM deadlines before every on-chain call — check whether epoch 1720200500 is within a valid window if now is epoch 1720200000 and I need at least 60 seconds of runway.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/evm-deadline-checkWhen to prefer
Use this endpoint when an AI agent or automated pipeline needs to preflight-check EVM transaction deadlines before submission — particularly in DeFi, on-chain automation, or smart contract workflows where submitting after a deadline wastes gas and fails on-chain. Prefer this over manual arithmetic when the check needs to be auditable (evidence block with input hash), stateless, and provably non-retaining.
Side effects
- Invalid or missing now_epoch, deadline_epoch, or minimum_lead_seconds fields result in a validation error
- Deadline already passed (lead_seconds negative) returns within_window: false with status fail
- Minimum lead time not met returns within_window: false even if deadline is in the future
- Malformed integer inputs may cause a 400 Bad Request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| now_epoch | integer | Now Epoch supplied to EVM Deadline Check; used only for this bounded calculation and processed in memory without retention. |
| deadline_epoch | integer | Deadline Epoch supplied to EVM Deadline Check; used only for this bounded calculation and processed in memory without retention. |
| minimum_lead_seconds | integer | Minimum Lead Seconds supplied to EVM 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": 9223372036854776000,
"minimum_lead_seconds": 60
},
"schema": "delx/util-evm-deadline-check/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "6837bc595d9c82af4770ef6b89ff2cab040826dc0d84c5e6251a7516cefbedb6",
"external_calls": 0
},
"operation": "evm_preflight:evm_deadline_check"
}
}Tags
x402
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