About cron-parser
cron-parser is an API for developers who need to inspect or work with cron schedules. It explains and validates expressions, supports standard five-field cron and presets, and can compute upcoming run times.
Key features
- 01Explain cron expressions
- 02Validate cron expressions
- 03Support five-field cron
- 04Support presets such as @daily and @weekly
- 05Compute upcoming run times
Use cases
- 01Explain an unfamiliar cron schedule
- 02Validate a scheduled task expression
- 03Check when a job will run next
Configuration
Remote servers need no local install. Pick your client, then copy the config or install in one click.
https://api.lazy-mac.com/cron-parser/mcpclaude mcp add --transport http lazymac2x-cron-parser https://api.lazy-mac.com/cron-parser/mcp{"mcpServers":{"lazymac2x-cron-parser":{"type":"http","url":"https://api.lazy-mac.com/cron-parser/mcp"}}}Open in Cursor{"servers":{"lazymac2x-cron-parser":{"type":"http","url":"https://api.lazy-mac.com/cron-parser/mcp"}}}Open in VS Code{"mcpServers":{"lazymac2x-cron-parser":{"type":"http","url":"https://api.lazy-mac.com/cron-parser/mcp"}}}{"mcpServers":{"lazymac2x-cron-parser":{"serverUrl":"https://api.lazy-mac.com/cron-parser/mcp"}}}Run commands in a terminal; paste JSON into the client’s MCP config and restart. Servers that need sign-in will prompt on first connect.
Tools
6| Parameter | Type | Required | Description |
|---|---|---|---|
| expression | string | Yes | Cron expression (e.g. "*/5 * * * *" or "@daily") |
Details
From the project README
cron-parser-api
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Cron expression parser API — explain, validate, generate, and compute next run times. Supports standard 5-field cron + presets (@daily, @weekly).
Quick Start
npm install && npm start # http://localhost:4400
Endpoints
# Explain a cron expression in plain English
curl http://localhost:4400/api/v1/explain/*/5%20*%20*%20*%20*
# → "at minutes 0, 5, 10, ..., of every hour"
# Validate
curl http://localhost:4400/api/v1/validate/0%209%20*%20*%201-5
# Next 5 run times
curl "http://localhost:4400/api/v1/next/0%209%20*%20*%20*?count=5"
# Generate cron from description
curl -X POST http://localhost:4400/api/v1/generate \
-H "Content-Type: application/json" \
-d '{"every":"day","at":{"hour":9,"minute":0}}'
# Common cron expressions
curl http://localhost:4400/api/v1/common
License
MIT
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