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AgentTools Cron Expression Describer
x402
AgentTools Cron Expression Describer is a paid API for AI agents from agenttools-hub.vercel.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-02).
Translates a cron expression into plain English, validates it, and computes the next scheduled execution times
Price / call$0.001
Success—
StatusUnknown
How this service works
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.
Output
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).
Example use cases
Explain cron job to non-technical stakeholder
“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?”
Debug unexpected cron firing time
“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?”
Validate cron before deploying
“Before I deploy this, can you check if '0 0 30 2 *' is a valid cron expression and explain what it would mean?”
Technical details
Endpoint
GEThttps://agenttools-hub.vercel.app/api/v1/dev/cron-describe?utm_source=zero.xyzWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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