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Retry After Parse
x402
Retry After Parse 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).
Normalizes an HTTP Retry-After header value (seconds or HTTP-date) into a delay in seconds using a caller-supplied current epoch, returning a deterministic pass/advisory finding.
Price / call$0.001
Success—
StatusUnknown
How this service works
Retry After Parse: Retry After Parse normalizes Retry-After seconds or an HTTP-date epoch into a delay from bounded caller-supplied values without an external provider. Call Retry After Parse before accepting, caching, redirecting, or retrying a caller-supplied web response. Returns normalized web evidence, the computed finding, and an explicit pass or advisory status for Retry After Parse as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base. First-party, stateless, memory-only…
Output
Returns a versioned deterministic JSON object containing the normalized delay in seconds, the raw input evidence, a computed finding, and an explicit pass or advisory status indicating whether the Retry-After value is well-formed and usable.
Example use cases
Rate-limited API retry scheduling
“I just got a 429 response with a Retry-After header saying '120' — my current epoch is 1745200000. Parse that and tell me the delay in seconds and whether it's safe to retry.”
HTTP-date Retry-After in a crawler
“My crawler received a Retry-After header with value 'Fri, 01 Aug 2025 12:00:00 GMT' and the current epoch is 1753000000. How many seconds should I wait before making the next request?”
Validating Retry-After before caching a redirect
“Before I cache this redirect response, I need to parse the Retry-After header value 'Thu, 10 Jul 2025 00:00:00 GMT' given now_epoch 1748000000 — is this value valid and what delay does it imply?”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/retry-after-parseWhen to prefer
Choose this endpoint when an agent or HTTP client needs to deterministically interpret an HTTP Retry-After header — whether expressed as a seconds integer or an HTTP-date string — into a concrete delay before retrying or caching. It is stateless, requires no API key, and returns structured pass/advisory findings, making it ideal for lightweight client-side rate-limit handling logic inside automated pipelines.
Side effects
- Missing or empty value field returns an error or advisory status
- Invalid date string that cannot be parsed returns an advisory/fail status
- now_epoch not supplied or not an integer causes computation failure
- Retry-After value exceeds maxLength of 8192 characters is rejected
- Negative or zero computed delay may return advisory status
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| value | string | Value supplied to Retry After Parse; used only for this bounded calculation and processed in memory without retention. |
| now_epoch | integer | Now Epoch supplied to Retry After Parse; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"delay_seconds": 120,
"retry_at_epoch": 1720000120
},
"schema": "delx/util-retry-after-parse/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "d9694253aa50ca3a4c76da4bbf323706780e4a4cfeb723b7ee5a097e2965b646",
"external_calls": 0
},
"operation": "web_reliability:retry_after_parse"
}
}Tags
x402
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