Introducing Crontap built-in uptime monitoring
Uptime monitoring lives next to your scheduled jobs now: 1-minute checks on Pro, 90-day bar chart, email alerts on the up→down transition.
Blog & guides
Everything we know about cron, on the internet.
Tutorials, patterns and product updates on scheduling API calls, webhooks and automations. From plain-English cron to timezone-aware retries. Long-form stack guides live at /guides.
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Find posts by what they cover.
Every blog post is tagged with one or more topics. Pick a topic to see only the posts that cover it.
UptimeRobot alternative for developers who already cron
Side-by-side: UptimeRobot vs Better Stack vs Pingdom on intervals, alert channels, and free-tier maths. Plus the wedge nobody else has: uptime and cron on one dashboard.
Vercel Cron every minute: beating the Hobby hourly limit
Vercel Cron caps Hobby at hourly cadence and 5 jobs, and ties every change to a redeploy. Here is the external cron pattern teams use to ship per-minute schedules, per-IANA timezones, and one dashboard across projects without paying $20/mo per user for Pro.
Why your WordPress scheduled tasks are missing (and how to fix wp-cron)
wp-cron only fires on visitor traffic, which is why your 5am Monday digest lands at 8:14am. Here is the documented fix: disable wp-cron, point Crontap at wp-cron.php on a real clock, and get scheduled posts and WooCommerce renewals firing on time.
Cloud Run cron without Cloud Scheduler
Cloud Scheduler costs $0.10 per job per month after the first 3 and asks for OIDC plus IAM bindings on every target. Here is the IAM-free pattern Cloud Run teams use to fire their .run.app URLs on a clock with one bearer token and one dashboard across every GCP project.
Heroku Scheduler alternative: any cron expression without the add-on
Heroku Scheduler caps you at three cadences and account-wide UTC, and spins a one-off dyno per run. Here is the external cron pattern that gives you any cron expression, per-schedule timezones, and zero per-execution dyno spin-up cost.
Shopify Admin API: recurring checkout sync via external HTTP cron
Shopify Flow fires on events, not on a clock. Here is the windowed GET pattern teams use to poll the Admin API on a per-shop, per-timezone cadence with Crontap, including rate-limit handling for multi-shop operators.
Running an OpenAI sentiment pipeline on a real scheduler
OpenAI batch work needs a clock, not a user session. Here is the scheduled HTTP-route pattern teams use to drain LLM batches at a sustainable rate inside OpenAI's rate limits, with per-task failure alerts.
Cron syntax cheat sheet with real-world examples
Cron syntax without the math. Every pattern you're likely to reach for (every 5 minutes, weekdays, business hours, first of the month), with a practical example and a link to a free debugger.
The archive
All 50 blog posts.
Every guide, pattern and product update we have shipped, in reverse chronological order.
May 2026
8 postsDead man's switch, explained for developers
Most monitoring watches for things going wrong. A dead man's switch watches for nothing happening when something was supposed to. The definitional guide plus a 60-second build walkthrough.
What is a cron job in Linux?
The developer's complete reference: five-field expressions, crontab -e, where logs live, PATH gotchas, and when local cron stops being enough for production.
A weekly AI-written Stripe disputes and refunds digest, on a Friday cron
Stripe Smart Disputes submits evidence; Workflows for Slack pings real-time. Neither writes the Friday narrative finance actually reads. Here is the Stripe API + GPT + Resend pattern that does, on a Friday 5pm cron in your team's timezone, for about a dollar a month.
Cronhub is shutting down: how to migrate (and what to pick next)
Cronhub stops billing on May 31, 2026 and deletes everything on June 30, 2026. Migration paths for both halves of the product (Scheduler and Monitoring), an honest comparison of Crontap, Healthchecks.io, Cronitor, UptimeRobot, and Recuro, plus a click-by-click walkthrough.
Cron job not running? 8-step checklist
The order that fixes 95% of broken crons: daemon status, crontab syntax, PATH, permissions, syslog, script exits, timezone, host limits.
Cron heartbeats vs uptime monitors: which do you actually need?
Heartbeats catch silent failures. Uptime monitors catch loud ones. They look similar and aren't. A four-criteria framework for picking one, both, or neither.
Build in public Twitter automation: daily devlog tweet from your GitHub commits
GitHub Actions cron drifts 30-60 minutes and auto-disables after 60 days no commits. Here is the indie-hacker pattern that pulls yesterday's commits, asks GPT for a tweet draft, and parks it in Typefully for tomorrow's 09:30 in your timezone, for about $0.02 a month.
Competitor price monitoring with AI, on a 6-hour Firecrawl + GPT cron
Clay's Growth plan starts at $185/month for this exact pattern. Here is the DIY shape: Firecrawl scrapes JS-rendered pricing pages, GPT extracts structured prices with a strict JSON schema, Slack pings on drift, Crontap fires every six hours in your team's timezone. About $8.50/month.
April 2026
4 postsDaily Stripe reconciliation on a cron
Reconciliation, custom dunning, multi-timezone monthly invoices, webhook replay. Four scheduling patterns Stripe does not give you, and the external-cron shape that fires them all from one dashboard.
WooCommerce cron not running: the traffic problem and the fix
Renewal emails late, coupon expirations stuck past midnight, Action Scheduler past-due climbing? WooCommerce cron problems are wp-cron problems. Here is the 5-minute fix that puts Action Scheduler on a real clock.
Railway cron: the external HTTP pattern
Railway does not ship a scheduler. The three options teams try are an always-on worker, GitHub Actions cron with drift, and external HTTP cron. Here is why the external pattern wins for HTTPS triggers and how to wire Crontap at your *.up.railway.app URL.
- Reference
Where are cron logs stored?
The cron log file paths by distro (Debian, RHEL, Alpine, macOS), how to read them, and when to stop reading log files and use a managed dashboard.
March 2026
5 postsSynthetic monitoring tools (12 picks)
The four flavors of synthetic monitoring (browser, API, uptime, cron-scheduled), 3 picks per category, and an honest take on which one fits which job.
Scheduled WhatsApp Business reminders at scale
WhatsApp Business has no scheduler. Build a /whatsapp-notification endpoint, drive it from an external cron per timezone, and ship reminders, recaps, and review nudges without rebuilding a clock.
The Zapier Schedule task cost math (and the external cron fix)
A 1-minute Zap eats 43,200 tasks a month before doing any actual work. Swap the Schedule trigger for a Catch Hook, fire it from Crontap, reclaim your quota for the actions that matter.
Schedule n8n workflows externally via webhook
n8n's Schedule Trigger is fine for basic cadences, but it struggles with precise cron, timezones and triggering from outside n8n. Here's how to schedule n8n workflows using Crontap and a Webhook trigger instead.
Run a Zapier zap every 5 minutes (or any custom cron)
Zapier's Schedule trigger is limited: hourly floor on free, no cron syntax, no timezones per zap. Here's how to drive a zap on any cadence you want using Crontap as the external trigger.
February 2026
5 postsNetlify Scheduled Functions alternative: any cadence, no 30-second cap
Netlify Scheduled Functions are beta with a 30-second function timeout and an hourly cadence floor on lower plans. Here is the external cron pattern that gives you any cadence, longer runs, and prod-and-preview parity from one dashboard.
Google Apps Script external scheduler: one dashboard for all your exec URLs
Apps Script time-driven triggers are bound to one Google account, with no cross-script view and a coarse cadence floor. Here is the external scheduler pattern that drives every /exec URL from one dashboard with real cron, IANA timezones, and per-job failure alerts.
Firebase scheduled functions without the Blaze plan
Firebase Scheduled Functions sit on top of Cloud Scheduler and Pub/Sub and require Blaze. Here is the external HTTP cron pattern that keeps you on Spark, runs the scheduled work on any HTTPS endpoint, and gives you per-IANA timezones and per-job alerts.
Fly.io cron alternative: schedule HTTP calls without an always-on machine
Fly.io has no scheduled-HTTP primitive, scheduled Machines are coarse, and an always-on worker is a full Machine for one HTTP call. Here is the external cron pattern that puts the clock outside Fly with per-IANA timezones, per-job alerts, and no always-on Machine cost.
Render Cron vs external scheduler: when to pull the cron out of the service
Render Cron Jobs are per-service, paid-tier only, and coupled to the service's deploy lifecycle. Here is the external cron pattern that gives multi-environment Render teams a single dashboard, per-IANA timezones, and decoupled-from-redeploys behaviour.
January 2026
6 postsGhost for content, external cron for the clock: scheduling the creator backend
Ghost is a publishing platform, not a job runner. Most creators add a small custom backend for everything Ghost cannot represent. Here is the external cron pattern that schedules the backend's work without standing up Redis for one job.
Make webhook every minute: trigger Make scenarios on any cadence via external cron
Make's Schedule trigger costs an operation per fire even when the scenario does nothing. A 5-minute scenario costs 8,640 ops/month before any real work runs. Here is how to drop the internal schedule, swap to a Custom Webhook, and fire it from Crontap on any cadence.
HubSpot workflows vs external cron: when to trigger your own API on a clock
HubSpot Workflows are CRM-state-driven. The Scheduled trigger is plan-gated to Operations Hub Pro+. Here is the external cron pattern that keeps HubSpot doing CRM work and lets a real scheduler fire your own backend on a wall clock.
Airtable Automations vs external cron: when you need to leave the no-code scheduler
Airtable Automations are great for event-driven work but plan-gated and cadence-capped for scheduled triggers. Here is the external cron pattern that calls Airtable's REST API on any cadence, on any plan, with a Personal Access Token and a thin backend endpoint.
Bubble Scheduled Workflows vs external cron: the workload-unit math
Bubble's `Schedule API Workflow` action is itself a workflow action billed at 0.7 WU per call. At minute cadence that is 30,240 WU/month on bookkeeping alone, ~17% of a Starter plan before any work runs. Here is the math and the external cron pattern that drops scheduling overhead to zero.
How to schedule a Bubble.io workflow every minute (without burning workload units)
Bubble's native scheduler stops at daily and the only sub-daily path is a recursive API workflow that pays 0.7 WU per re-schedule. Here is the click-by-click setup for triggering a public API workflow from external cron in 5 minutes, so the schedule itself costs 0 WU.
December 2025
5 postsWhy GitHub Actions cron misses and what to use instead
GitHub Actions cron is free and right next to your code, but GitHub itself documents that schedule events 'may be delayed during high load'. Here is the on-time pattern teams use: workflow_dispatch + external cron + retries.
AWS Lambda cron without EventBridge: the Function URL pattern
EventBridge wants an IAM role per target, an invoke permission per Rule, and a console wizard per region. Lambda Function URLs plus a bearer-in-handler check skip every step of that and let one Crontap schedule fire your Lambda on any cron in any IANA timezone.
Cloudflare Workers Cron Triggers vs external cron
Cron Triggers are great for a single-purpose Worker. Once you have several Workers across several zones, the schedules live in eight wrangler.toml files. Here is the external-cron pattern teams use for one dashboard, per-IANA timezone, retries, and a cadence change without a deploy.
Running weekly payroll on external cron for multi-tenant SaaS
Per-tenant cadence, per-tenant timezone, tenants come and go. Hardcoded crontabs and in-process schedulers both buckle on the multi-tenant axis. Here is the one-schedule-per-tenant pattern with bulk create, DST-safe timezones, and centralized alerts.
Pair Crontap with Healthchecks.io for end-to-end monitoring
Crontap alerts on failed runs. Healthchecks.io alerts on missing runs. The pair covers both failure modes (the run that failed, the run that never happened), free across both free tiers or a few dollars a month on Pro. Here is the two-schedule pattern with worked example.
August 2024
1 postBuild a 24/7 AI Brand Monitor: Crontap + Replicate's Llama 3.1
Learn how to set up a brand monitoring AI agent, utilizing the power of Crontap for scheduling and Replicate's Llama 3.1 for sophisticated content analysis.
July 2023
2 postsAutomated posting to twitter with Crontap and IFTTT
Integrate Crontap with IFTTT to unlock hundreds of apps and automate your workflows. In this guide, we will show you how to post to twitter with Crontap and IFTTT.
Label crons and pause/resume schedules ✨ Crontap product updates.
New in Crontap! Label your crons and pause/resume schedules. For people with many cron schedules, it is also possible to sort & filter schedules now.
May 2023
5 postsA primer on Webhooks: Empowering Connections
Webhooks are the digital messengers that deliver real-time updates and data between applications, enabling seamless integration and automation. With webhooks, you can stay updated, take immediate action, and build intelligent event-driven systems.
Crontap, Zapier, and Airtable integration. Automated scheduling and data management.
Unlock the power of Crontap and Zapier integration, and revolutionize your workflow efficiency with Airtable. Explore the potential of scheduled webhooks and advanced data management capabilities, empowering you to automate tasks and streamline your processes.
Streamline Your Workflow with Automated Integrations: Crontap, Make and Airtable
Discover the power of seamless integration between Crontap and Airtable, and unlock the potential for automating your workflow tasks. Learn how to leverage scheduled webhooks and data management capabilities for enhanced productivity and efficiency.
Integrate Crontap schedules with Make.com Webhooks
Learn how to use Crontap webhook schedules to integrate with Make.com and thousands of apps: sms, email, telegram, airtable, slack, teams, twitter or your own custom webhook e.g. a cloud function.
Use Zapier with Crontap schedules to get access to thousands of apps
Use Crontap webhook schedules to integrate with Zapier and thousands of apps: slack, teams, airtable, sms, email, twitter, telegram or your own custom webhooks such as your own cloud functions.