Cron Expression Parser API

Explain a five-field cron expression and list its next run times (UTC).

POST /api/v1/tools/cron-expression-parserMCP cron_expression_parserTime & Date

Explain any 5-field cron expression in plain English, catch syntax errors, and preview the next 10 run times in UTC or your local time zone.

Input

Send these as a JSON object. Unknown fields are rejected.

expression: The cron expression, e.g. 0 9 * * 1-5. (string, required)
count: How many next runs to list (1 to 50). (integer, 1 to 50, default 5)
from: ISO 8601 start time for next runs. Defaults to now. (string, up to 40 characters)

Try it in the browser JSON Schema Get an API key

curl https://pithlab.com/api/v1/tools/cron-expression-parser \n  -H "Authorization: Bearer $PITHLAB_KEY" \n  -H "Content-Type: application/json" \n  -d '{"expression":"0 9 * * 1-5","count":3,"from":"2026-10-20T00:00:00Z"}'

Example response

{
  "ok": true,
  "result": {
    "description": "At 09:00 on Monday through Friday",
    "nextRuns": [
      "2026-10-20T09:00:00.000Z",
      "2026-10-21T09:00:00.000Z",
      "2026-10-22T09:00:00.000Z"
    ]
  }
}