node-cron
Cron job scheduler for Node.js using standard cron syntax. node-cron enables scheduling recurring tasks within a Node.js application using familiar cron expressions (second-level resolution supported). Simple API: cron.schedule('* * * * *', callback). In-process scheduling — no external service needed. Used for periodic cleanup, report generation, health checks, and maintenance tasks in Node.js applications.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Local scheduling — no security concerns specific to node-cron. Scheduled tasks should follow same security practices as the application.
⚡ Reliability
Best When
You need simple in-process cron scheduling for a single-instance Node.js application without external infrastructure.
Avoid When
You have multiple server instances (load balancer) — all instances will run the job simultaneously. Use BullMQ, Agenda, or cloud schedulers for distributed scheduling.
Use Cases
- • Schedule recurring agent tasks (data sync, cleanup, reports) using cron expressions within a Node.js application
- • Run periodic health checks or data validation jobs in agent backends without external scheduling infrastructure
- • Schedule email digests, notifications, or summary generation at configured intervals
- • Implement time-based agent triggers that run on specific schedules (every hour, every Monday, monthly rollups)
- • Replace external cron jobs with in-process scheduling when the application manages its own lifecycle
Not For
- • Distributed scheduling across multiple server instances — all instances will fire; use BullMQ or external schedulers for distributed deduplication
- • Long-running jobs — node-cron is for quick tasks; for long jobs use job queues (BullMQ) with proper lifecycle management
- • Job persistence — node-cron schedules are lost on restart; use persistent schedulers for jobs that must survive restarts
Interface
Authentication
No authentication — local scheduling library.
Pricing
MIT-licensed open source library.
Agent Metadata
Known Gotchas
- ⚠ In a clustered/load-balanced environment ALL instances run the cron job — implement distributed locks (Redis SETNX) to ensure only one instance executes at a time
- ⚠ Task errors don't automatically stop the schedule — unhandled errors in task callbacks may crash the process or be silently swallowed depending on Node.js version
- ⚠ Default timezone is UTC — specify timezone option explicitly: cron.schedule('0 9 * * *', fn, {timezone: 'America/New_York'}) for timezone-aware schedules
- ⚠ node-cron schedules are not persisted — server restart clears all schedules; recreate schedules on application startup
- ⚠ Overlapping executions are not prevented by default — if a task takes longer than its schedule interval, tasks can overlap; implement mutex/lock if overlap is problematic
- ⚠ Cron expression format in node-cron includes seconds as first field — '* * * * * *' has 6 fields (second minute hour day month weekday); standard cron expressions with 5 fields also work
Alternatives
Full Evaluation Report
Detailed scoring breakdown, competitive positioning, security analysis, and improvement recommendations for node-cron.
Scores are editorial opinions as of 2026-03-06.