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fastapi.online — Cron Expression Parser
x402
fastapi.online — Cron Expression Parser is a paid API for AI agents from api.fastapi.online, paid per call via x402, $0.0005/call, status unknown (last checked 2026-09-14).
Parses a cron expression and returns the next N scheduled execution times
Price / call$0.0005
Success—
StatusUnknown
How this service works
Chat, embeddings, OCR, speech-to-text, image editing, image understanding (captioning/Q&A), text-to-speech, translation, writing tools, classification tools, developer tools, local utilities, format/checksum validators, encoding & crypto utilities, date/time calculators, geo/coordinate math, math & finance calculators, novelty tools, and business/social writing generators — 179 endpoints in all, across multiple specialized self-hosted models. Pay per call with crypto — no signup — or get an API key.
Output
Returns a list of up to 20 upcoming datetime timestamps representing the next scheduled execution times computed from the provided cron expression, allowing the caller to verify correctness and cadence of the schedule.
Example use cases
Debug a cron schedule before deploying
“I've got a cron expression '30 6 1 * *' and I want to see the next 3 dates it'll fire — can you check it for me before I deploy this job?”
Verify daily backup job timing
“My daily backup cron is '0 2 * * *' — can you show me the next 10 times it will run so I can confirm it's scheduled correctly?”
Preview complex cron trigger cadence
“Parse this cron expression '*/15 8-18 * * 1-5' and list the next 20 scheduled times so I can understand how often it fires during business hours.”
Technical details
Endpoint
POSThttps://api.fastapi.online/cron-parseWhen to prefer
Choose this endpoint when you need a lightweight, pay-per-call cron expression parser with no signup required, especially useful in serverless agent pipelines that need to validate or preview scheduled job timing on demand. Prefer it over implementing cron parsing locally when you want a hosted utility callable via HTTP with crypto micropayments.
Side effects
- Invalid cron expression syntax returns an error response
- count outside 1–20 range is rejected with a validation error
- Malformed JSON body returns 422 Unprocessable Entity
- Expression too long (>100 characters) is rejected
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| count | integer | |
| expression | string |
Tags
x402
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