{"uid":"cap_A2kEtDsaU4IZCQ-Yea15f","slug":"grokzilla-cron-expression-validator-next-run-scheduler-e9a134a4","name":"Grokzilla Cron Expression Validator & Next-Run Scheduler","description":"Validate a 5-field cron expression (lists, ranges, steps, JAN-DEC/SUN-SAT names, @daily/@hourly macros) and return its next 1-20 run times in any IANA time zone (DST-aware), as local ISO, UTC ISO and epoch seconds. Deterministic, no network.","url":"https://grokzilla.shop/api/skills/cron-next?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"tz":{"type":"string","default":"UTC","maxLength":64,"minLength":1},"expr":{"type":"string","maxLength":200,"minLength":1},"from":{"type":"string","maxLength":64,"minLength":1},"count":{"type":"integer","default":5,"maximum":20,"minimum":1}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.0031","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.0031/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0031","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0031","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_4Sc4wv0EAUh4g8UkvVNMT","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.0031","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Validates a cron expression and returns its next 1–20 scheduled run times in any IANA time zone, with DST-aware local ISO, UTC ISO, and epoch seconds outputs.","exampleAgentPrompt":"Can you validate the cron expression '0 9 * * MON-FRI' and show me the next 10 times it will fire, in America/New_York time?","exampleUseCases":[{"title":"Verify CI/CD pipeline schedule","prompt":"I have a CI job scheduled with the cron expression '0 2 * * *' — can you confirm it's valid and tell me the next 7 times it will run in UTC?"},{"title":"Debug DST-affected cron job","prompt":"My cron '30 1 * * SUN' keeps running at weird times — can you show me the next 15 occurrences in America/Chicago so I can see how daylight saving time affects it?"},{"title":"Preview monthly report automation","prompt":"We run monthly reports using '0 8 1 JAN-DEC *' — can you validate that expression and list the next 12 fire times in Europe/London as both local and UTC?"}],"resultDescription":"Returns a structured response containing: validation status of the cron expression, and for valid expressions a list of up to 20 next scheduled run times each expressed as a local ISO 8601 datetime (in the requested IANA time zone), a UTC ISO 8601 datetime, and a Unix epoch seconds integer.","failureModes":["Invalid cron expression syntax returns a validation error with details","Unrecognized IANA timezone string causes rejection","Count outside 1–20 range is rejected","Malformed 'from' datetime string causes a parse error","Network is not involved so there are no connectivity failures"],"whenToPreferThis":"Choose this endpoint when you need deterministic, offline cron parsing with full DST awareness, support for named month/weekday tokens (JAN-DEC, SUN-SAT), step and range syntax, and @daily/@hourly macros, and you want multiple output formats (local ISO, UTC ISO, epoch) in one call. Prefer it over generic cron libraries when working inside an agent tool-call context that benefits from a pay-per-use micro-service with no infrastructure to manage.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-18T12:39:37.557Z","isFirstParty":false,"canonicalSlug":"grokzilla-cron-expression-validator-next-run-scheduler-e9a134a4"}