Use cases · Serverless
Serverless cron jobs across Vercel, Lambda, Cloudflare, Netlify and friends
Most serverless platforms ship a built-in scheduler with one big constraint: UTC-only, fixed minimum interval, or coupled to deploys. The spokes here cover the work teams actually do.
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Serverless
Vercel Cron is convenient if you're on Pro and one UTC schedule is enough. Cloudflare Workers Cron Triggers floor at 1 minute and stay inside the Cloudflare estate. AWS Lambda needs EventBridge plus IAM. Firebase scheduling needs the Blaze plan. Netlify Scheduled Functions cap at 30-second runtimes. Each platform has a sensible answer for the simple case and runs out of headroom the moment you need per-schedule timezones, multiple environments, or schedules that don't ride your deploy cadence.
The spokes here are the external cron patterns for each: hit the Vercel function URL, the .run.app URL, the Lambda Function URL, the .workers.dev route, the Netlify function, the Firebase HTTPS function, the Supabase Edge Function. Same pattern across all of them: HTTP target, custom headers (a shared secret, a JWT, an OIDC token), per-schedule timezone, retries, failure alerts to Slack, Discord, Telegram, email or webhook. One dashboard across stacks.
Use cases on Serverless
8 itemsCache warming & pre-render triggers
Warm caches and trigger rebuilds so users never hit a cold page.
Vercel Cron alternative (sub-hour)
Every minute. No vercel.json redeploy. Unlimited jobs.
Cron jobs for Google Cloud Run
Trigger your .run.app URL. No Cloud Scheduler. No IAM dance.
Cron jobs for AWS Lambda
Point us at your Function URL. Skip EventBridge IAM.
Cron jobs for Netlify
Any cadence, no 30-second Scheduled Functions cap.
Cron jobs for Firebase
Works on Spark. No Blaze plan required.
Cron jobs for Cloudflare Workers
Sub-minute triggers when Cron Triggers fall short.
Cron jobs for Supabase Edge Functions
Fire Edge Functions on a cron without pg_cron gymnastics.
Related on Crontap
The same Serverless topic, from other angles.
FAQ
Common questions on Serverless
- If Vercel Cron already runs my schedule, why move?
- If one UTC schedule on a Vercel-hosted app is your whole need, stay. Move when you want a per-schedule timezone (Vercel Cron is UTC-only), sub-hour cadence on Hobby, multiple environments (preview vs prod) on the same plan, or a single dashboard across Vercel and non-Vercel work.
- How do I authenticate the call from Crontap into my serverless endpoint?
- Add a custom header on the Crontap schedule (X-Crontap-Token: <secret>) and check it inside the function. For Cloud Run or Cloud Functions you can also issue an OIDC token in the header. The schedule UI accepts arbitrary headers per schedule, so the same pattern works for AWS, Cloudflare, Vercel, Netlify, Firebase, Supabase.
- Cold starts. Will the first invocation after idle be slow?
- Sometimes, depending on platform. The cache-warming spoke is the explicit pattern for keeping serverless edges warm: schedule a low-priority warmup ping a few minutes before traffic peaks. Or just accept the first cold start of the day and have Crontap surface it as a slower duration in the run log so you spot it.
- Does Crontap care which platform I'm on?
- No. Every spoke here is the same shape: an HTTPS URL on a cron, in your timezone, with retries and alerts. Migrate between Vercel, Cloudflare, AWS and the schedule keeps working. That's most of the appeal of running cron outside the platform.
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