A Cloudflare Workers based MCP server that parses and manipulates cron expressions through a streamable HTTP interface. Exposes operations to explain cron syntax in plain English, validate expressions, generate the next N run times, create cron strings from structured descriptions (like "every day at 9am"), and list common patterns. Useful when you need Claude to schedule tasks, interpret existing cron jobs, or help users build schedules without memorizing cron syntax. The underlying API supports standard 5-field cron plus presets like @daily and @weekly. Runs as a remote service at api.lazy-mac.com, so no local installation needed beyond MCP configuration.

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Cron expression parser API — explain, validate, generate, and compute next run times. Supports standard 5-field cron + presets (@daily, @weekly).
npm install && npm start # http://localhost:4400
# 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
MIT
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