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Delx Commerce — Last Modified Compare
x402
Delx Commerce — Last Modified Compare 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).
Compares two Unix epoch timestamps to determine which is newer and by how many seconds
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 with a 'result' field containing 'direction' (e.g. 'newer') and 'delta_seconds' (integer), plus a 'status' field ('pass'), operation label, schema version, and an evidence block including input_sha256 hash, whether data was retained (always false), and number of external calls made (always 0). No input data is stored.
Example use cases
Detect stale cache vs fresh content
“I have two timestamps — the cached version at epoch 1698000000 and the server's current last-modified at 1698000500. Can you tell me which is newer and by how many seconds so I know if the cache is stale?”
Verify event ordering in audit log
“I need to confirm that event A (epoch 1701000000) actually happened before event B (epoch 1701003600) — can you compare them and tell me the direction and the gap in seconds?”
Check if a webhook arrived on time
“My webhook has a before timestamp of 1699500000 and an after timestamp of 1699500045 — compare them to confirm the after one is newer and tell me the delta in seconds.”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/last-modified-compare?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a simple, verifiable, privacy-preserving computation to compare two Unix epoch timestamps — especially in agent workflows requiring auditable evidence (input hash, no data retention) that one timestamp precedes or follows another. Prefer it over custom code when you need a pay-per-call, no-signup utility with cryptographic provenance for web reliability checks or event ordering validation.
Side effects
- Missing or non-integer epoch values may cause validation errors
- If before_epoch equals after_epoch, delta_seconds will be 0 and direction may be undefined or equal
- Payment failure via x402 will block the request before computation
- Extremely large or negative epoch values may produce unexpected results
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| after_epoch | integer | After Epoch supplied to Last Modified Compare; used only for this bounded calculation and processed in memory without retention. |
| before_epoch | integer | Before Epoch supplied to Last Modified Compare; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"direction": "newer",
"delta_seconds": 120
},
"schema": "delx/util-last-modified-compare/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "3af22a08d2240acef2720f15dceafc3801c8b2b7dffd60a82da13e82ad1839fb",
"external_calls": 0
},
"operation": "web_reliability:last_modified_compare"
}
}Tags
x402
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