{"uid":"cap_9qnoUHSMWk1t7Rvxt0bln","slug":"agenttools-cron-expression-describer-03b739bc","name":"AgentTools Cron Expression Describer","description":"Turn a cron expression into plain English, validate it, and compute the exact next execution times. Deterministic — the answer to 'when does this cron actually fire?' without guessing. Use this when an agent needs to explain a cron expression and compute the next runs.","url":"https://agentstoolshub.com/api/v1/dev/cron-describe?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["expr"],"properties":{"ref":{"type":"string","description":"Reference date (optional)"},"expr":{"type":"string","description":"5 fields: minute hour day month weekday"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","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":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_xPBsG1iNR-6lUb03Xw8q6","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Translates a cron expression into plain English, validates it, and returns the next scheduled execution times.","exampleAgentPrompt":"Can you explain what the cron expression '0 9 * * 1-5' means in plain English and tell me exactly when it will next run?","exampleUseCases":[{"title":"Explain a production job schedule","prompt":"We have a cron job set to '30 2 1 * *' — can you tell me what that means in plain English and when it will fire next?"},{"title":"Validate a newly written cron","prompt":"I just wrote this cron expression: '*/15 9-17 * * 1-5' — is it valid, and when are the next few times it will actually trigger?"},{"title":"Debug an unexpected job timing","prompt":"Our job is scheduled with '0 0 29 2 *' — can you explain when that actually runs and compute the next execution dates so I know if something is wrong?"}],"resultDescription":"Returns a human-readable English description of the cron expression, a validity indicator, and a list of the next computed execution timestamps based on the provided expression and optional reference date.","failureModes":["Invalid or malformed cron expression returns a validation error","Missing required 'expr' query parameter returns a 400 bad request","Cron expressions with impossible schedules (e.g. Feb 30) may return no upcoming execution times or an error","Expression with wrong number of fields (not 5) will fail validation"],"whenToPreferThis":"Use this endpoint when an agent needs to deterministically explain what a cron schedule does, verify its correctness, or compute exact next-run times — especially useful in CI/CD pipeline review, scheduler auditing, or user-facing automation dashboards where guessing or LLM hallucination is unacceptable.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T12:48:09.559Z","isFirstParty":false,"canonicalSlug":"agenttools-cron-expression-describer-03b739bc"}