{"uid":"cap_kZHwvDYeTddxAZFxgic82","slug":"agenttools-cron-expression-describer-87810b43","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://agenttools-hub.vercel.app/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":"0.001","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_AMVOzM1k7_YMPywpseKZA","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","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 computes the next scheduled execution times","exampleAgentPrompt":"Can you explain what the cron expression '0 9 * * 1-5' means in plain English and tell me the next 5 times it will fire?","exampleUseCases":[{"title":"Explain cron job to non-technical stakeholder","prompt":"Our CI/CD pipeline runs on '0 2 * * 0' — can you explain in plain English what that schedule means and when it will next run?"},{"title":"Debug unexpected cron firing time","prompt":"I set up a cron with '*/15 9-17 * * 1-5' but I'm not sure when it actually fires — can you describe it and give me the exact next few execution times?"},{"title":"Validate cron before deploying","prompt":"Before I deploy this, can you check if '0 0 30 2 *' is a valid cron expression and explain what it would mean?"}],"resultDescription":"Returns a plain-English description of the cron schedule, a validation status indicating whether the expression is well-formed, and a list of computed next execution timestamps based on the provided reference date (or current time if none given).","failureModes":["Invalid or malformed cron expression returns a validation error","Missing required 'expr' query parameter results in a 400-level error","Cron expression with impossible combinations (e.g. Feb 30) may return empty next-run list or validation failure","Non-standard 6-field or 7-field cron expressions (with seconds or year) may not be supported — only 5-field expressions accepted"],"whenToPreferThis":"Use this endpoint when an agent needs to deterministically explain, validate, or compute next run times for a standard 5-field cron expression without guessing or hallucinating schedule semantics. Prefer this over asking an LLM to interpret cron syntax directly, since LLMs can misread edge cases like day-of-week ranges or step values. Ideal for developer-facing agents, DevOps automation, CI/CD explanation tools, and any workflow that needs to surface human-readable schedule summaries.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T12:42:58.667Z","isFirstParty":false,"canonicalSlug":"agenttools-cron-expression-describer-87810b43"}