Home
- Availability
  
  Website uptime monitoring Monitor uptime and track downtime
  
  API & endpoint monitoring New Validate what your API returns
  
  Ping monitoring Monitor your server availability
  
  TCP port monitoring Monitor TCP port and track TCP port issues
  
  Application health monitoring Monitor queues, storage, cache
  
  Scheduled task monitoring Monitor cron & scheduled tasks
  
  Performance & SEO
  
  Performance monitoring Make sure your resources are responsive
  
  Lighthouse monitoring Monitor your lighthouse scores
  
  Sitemap monitoring Ensure sitemap SEO validity
  
  Site integrity
  
  SSL certificate monitoring Ensure a safe connection for your visitors
  
  Broken links monitoring Scans all pages, links & images
  
  DNS record monitoring Monitor your DNS changes
  
  Domain monitoring Monitor domain expiry dates
  
  DNS blocklist monitoring New Stay off spam and ad-block lists
  
  Port scanner New Monitor for exposed ports
  
  AI-powered monitoring Verify anything you want
  
  Incidents and your account
  
  Notifications Slack, email, SMS, webhooks & more
  
  Status Pages Keep users informed during incidents
  
  Client reporting Monthly branded client reports
  
  Single Sign-On (SSO) New Team sign-in via your own identity provider
  
  GDPR & EU data residency New EU-hosted data with a signable DPA
  
  Website uptime monitoring
  
  Oh Dear opens your site every minute. If it does not answer, a second location checks again. Only then do you get an alert.
  
  example.com Up
  
  99.99%
  
  uptime in the last 30 days
  
  One outage of 4 minutes, confirmed from a second location.
  
  See how it works
  
  API & endpoint monitoring
  New
  
  Oh Dear calls your endpoint every minute. It checks the status code, the body and the response time. So it catches an API that is broken but still answers 200.
  
  GET api.example.com/health Passing
  
  { "database": "ok", "queue": "ok" }
  
  Status code is 200
  
  Body contains "database": "ok"
  
  Answered in 412 ms
  
  See how it works
  
  Ping monitoring
  
  Oh Dear pings your server every minute. You see whether it answers and how long the answer takes.
  
  server.example.com Answering
  
  14 ms
  
  average round trip
  
  No packets lost.
  
  See how it works
  
  TCP port monitoring
  
  Oh Dear connects to the ports you name, every minute. You hear when a service such as mail or a database stops accepting connections.
  
  mail.example.com 1 port down
  
  25 SMTP Open, 38 ms
  
  993 IMAP Open, 41 ms
  
  3306 MySQL No answer
  
  See how it works
  
  Application health monitoring
  
  Your app reports its own health on one protected address. Oh Dear reads it every minute. It tells you which part is failing.
  
  example.com/health 1 problem
  
  Queue Running
  
  Database Connected
  
  Scheduler Ran a minute ago
  
  Disk space 91% used
  
  See how it works
  
  Scheduled task monitoring
  
  Your scheduled job pings Oh Dear each time it runs. When a ping does not arrive on time, you get an alert.
  
  php artisan backup:run Missed
  
  6 days ago
  
  Yesterday
  
  Today
  
  Expected
  
  Every day at 02:00
  
  Last ping
  
  Yesterday at 02:00:04
  
  Grace time
  
  5 minutes
  
  See how it works
  
  Performance monitoring
  
  Oh Dear measures how long your page takes to load, on every uptime check. You hear when it gets slower than usual.
  
  example.com Slower than usual
  
  Usually 212 ms Now 940 ms
  
  See how it works
  
  Lighthouse monitoring
  
  Oh Dear runs a Lighthouse report every day. You see when a score drops. You keep six months of reports.
  
  example.com Daily
  
  92
  
  Performance
  
  100
  
  Accessibility
  
  96
  
  Best practices
  
  98
  
  SEO
  
  See how it works
  
  Sitemap monitoring
  
  Oh Dear reads your sitemap every day. It checks that the file is valid and that every address in it still works.
  
  example.com/sitemap.xml 2 addresses fail
  
  sitemap.xml /old-pricing 404
  
  sitemap.xml /team/anna 404
  
  410 of 412 addresses work. The file is valid XML.
  
  See how it works
  
  SSL certificate monitoring
  
  Oh Dear checks your certificate every 30 minutes. You hear well before it expires. You also hear when the chain your server sends is broken.
  
  example.com:443 Valid
  
  23 days
  
  until the certificate expires
  
  Issued by
  
  Let's Encrypt
  
  Chain
  
  Complete, 3 certificates
  
  See how it works
  
  Broken links monitoring
  
  Oh Dear crawls your whole site once a day. It lists every page that links to something that no longer works.
  
  example.com 3 broken links
  
  /pricing /plans 404
  
  /blog/launch /img/hero.png 404
  
  /about partner.example 410
  
  Found in a crawl of 412 pages.
  
  See how it works
  
  DNS record monitoring
  
  Oh Dear reads your DNS records every two hours, from every authoritative nameserver. You see what changed and what it was before.
  
  example.com 1 record changed
  
  A 203.0.113.10
  
  A 203.0.113.24
  
  MX 10 mail.example.com unchanged
  
  NS ns1.example.net unchanged
  
  See how it works
  
  Domain monitoring
  
  Oh Dear watches the date your domain expires. It checks more often as that date gets closer. So you never miss the renewal.
  
  example.com Registered
  
  41 days
  
  until the domain expires
  
  Checked now
  
  Twice a day
  
  In the final 30 days
  
  Every 4 hours
  
  See how it works
  
  DNS blocklist monitoring
  New
  
  Oh Dear checks whether your server address is on a blocklist. Being listed means your mail or your site can be blocked.
  
  mail.example.com Not listed
  
  Spamhaus ZEN Not listed
  
  Barracuda Not listed
  
  SpamCop Not listed
  
  Quad9 Not blocked
  
  See how it works
  
  Port scanner
  New
  
  Oh Dear scans all 65,535 TCP ports of your server once a day. You hear when a port is open that you did not expect.
  
  203.0.113.10 1 unexpected port
  
  Expected open
  
  22 80 443
  
  Also open
  
  3306 MySQL
  
  See how it works
  
  AI-powered monitoring
  
  You describe in plain English what should work. An AI checks it in a real browser. Then it tells you what it found.
  
  shop.example.com Passed
  
  “Add a product to the cart. The cart should then show 1 item.”
  
  Opened the product page
  
  Clicked "Add to cart"
  
  The cart shows 1 item
  
  See how it works
  
  Notifications
  
  You decide who hears about a problem and where. Each alert goes to the right people, on the channel they read.
  
  shop.example.com is down Alert sent
  
  Slack #ops
  
  SMS Whoever is on call
  
  Email The client
  
  12 channels, including Teams, PagerDuty and webhooks.
  
  See how it works
  
  Status Pages
  
  A status page shows your visitors what is working right now. It updates itself from your checks. You can also post an update yourself.
  
  status.example.com 1 incident
  
  Website Operational
  
  Checkout Investigating
  
  API Operational
  
  Some checkouts are slow. We are looking into it.
  
  See how it works
  
  Client reporting
  
  Your client gets a report every month. It shows uptime, speed and incidents. Your client can read it without asking you.
  
  Monthly report for example.com Sent
  
  99.99%
  
  Uptime
  
  212 ms
  
  Average response
  
  1
  
  Incident
  
  Past reports stay available.
  
  See how it works
  
  Single Sign-On (SSO)
  New
  
  Your team signs in to Oh Dear through your own identity provider. When someone leaves your company, you remove them once at your provider. That also ends their access to Oh Dear.
  
  Sign in to Oh Dear SAML 2.0
  
  you@example.com
  
  Continue with single sign-on
  
  Works with Okta, Microsoft Entra ID, Google Workspace and any other SAML 2.0 provider. On every plan.
  
  See how it works
  
  GDPR & EU data residency
  New
  
  Oh Dear is a Belgian company. Your monitoring data is stored in Belgium. Every customer can sign a data processing agreement.
  
  Where your data lives EU
  
  Company
  
  Belgian, so GDPR applies
  
  Data stored in
  
  Belgium
  
  Agreement
  
  A DPA every customer can sign
  
  Subprocessors
  
  A public list
  
  See how it works
- Who it is for
  
  Web agencies Client reports, multi-site monitoring, and shared dashboards
  
  Marketing agencies SEO scores, page speed, and campaign uptime
  
  Hosting providers Independent uptime validation and reselling
  
  Sysadmins & DevOps TCP ports, ping, DNS, and infrastructure alerts
  
  PHP developers Laravel health, task monitoring, and alerts
  
  E-commerce Uptime during sales, checkout monitoring, SSL
  
  SaaS founders Simple monitoring, status pages, sleep better
  
  Need to monitor something else? Tell us what you need to monitor. We will say honestly whether Oh Dear fits.
  
  Case studies
  
  There There Healthy inside. Unreachable outside.
  
  All case studies How teams use Oh Dear
  
  Web agencies
  
  Which client site broke, and does the client know?
  
  Your client sites
  
  bakery.example Up
  
  dentist.example Certificate expires in 9 days
  
  law-firm.example Up
  
  shop.example 2 broken links
  
  Read the page
  
  Marketing agencies
  
  Did the campaign page stay fast and easy to find?
  
  Campaign pages
  
  spring-sale.example Lighthouse 94
  
  launch.example Lighthouse 61
  
  newsletter.example Up, no broken links
  
  Read the page
  
  Hosting providers
  
  Is it our network, or the customer's site?
  
  Your servers
  
  web-01.example.net Ping 12 ms
  
  mail-01.example.net Port 25 open
  
  db-01.example.net Port 3306 open
  
  status.example.net All systems operational
  
  Read the page
  
  Sysadmins & DevOps
  
  Are the ports, DNS records and certificates still as I left them?
  
  Infrastructure
  
  Redis, port 6379 Open
  
  DNS for example.com No changes
  
  api.example.com certificate 64 days left
  
  203.0.113.10 Port 3306 is open
  
  Read the page
  
  PHP developers
  
  Did the queue and the scheduler actually run?
  
  Laravel app health
  
  Queue Running
  
  Scheduler Ran a minute ago
  
  Horizon Running
  
  backup:run Missed last night
  
  Read the page
  
  E-commerce
  
  Can people still check out?
  
  Your shop
  
  Checkout endpoint 200 OK, 412 ms
  
  Product pages Usual speed
  
  Certificate Expires in 51 days
  
  Payment provider callback No answer
  
  Read the page
  
  SaaS founders
  
  Do customers know we are working on it?
  
  Your product
  
  app.example.com Up
  
  Nightly billing job Ran at 03:00
  
  Status page Investigating: slow sign-ins
  
  Read the page
  
  Need to monitor something else?
  
  Tell us what you need to monitor. We will say honestly whether Oh Dear fits.
  
  support@ohdear.app
  
  Support answers on weekdays, from 9:00 to 17:00 CET.
  
  Billing and sales have their own address.
  
  Contact us
  
  There There
  
  A security update broke There There's network. Nothing on the server could see it. Oh Dear's check from outside told the team in Slack within two minutes.
  
  There There Case study
  
  2 min
  
  to the Slack alert
  
  43 min
  
  until it was fixed
  
  0
  
  customers noticed
  
  Healthy inside. Unreachable outside.
  
  Read the story
  
  All case studies
  
  Real outages at real companies. What broke, how Oh Dear spotted it, and how fast the team knew.
  
  There There Featured
  
  “Oh Dear noticed the server was down and told us in Slack within a few minutes, before any customer noticed.”
  
  Freek Van der Herten Founder, Spatie
  
  See all case studies
Pricing
- Documentation
  
  Checks and features Oh Dear's core functionality
  
  API Integrate Oh Dear in your own app
  
  Tools & SDKs SDKs, AI, integrations, and free tools
  
  Notifications All the ways we can notify you
  
  Status pages Inform your audience about your status
  
  FAQ Frequently asked questions
  
  Third-party integrations Services that work with Oh Dear
  
  About Oh Dear
  
  Who uses Oh Dear And their experience
  
  State of Website Uptime What real outage data tells us
  
  Changelog Product updates and fixes
  
  Security How we handle your data
  
  Contact We're here to help
  
  Affiliate program Spread the word and earn
  
  Logos Brand assets and more
  
  Checks and features
  
  A list of every check Oh Dear runs, with a page for each one.
  
  Every check Oh Dear runs
  
  Uptime Performance Certificates Broken links Mixed content Lighthouse DNS Domain expiry Sitemap Cron jobs Application health Ping TCP ports Port scanner DNS blocklist AI checks
  
  Open this page
  
  API
  
  Use the API to manage monitors and read results from your own code.
  
  Your first request
  
  $ curl https://ohdear.app/api/monitors \ -H "Authorization: Bearer $OHDEAR_TOKEN"
  
  Open this page
  
  Tools & SDKs
  
  Libraries, AI tools and integrations, so you do not have to write the API calls yourself.
  
  Install the PHP SDK
  
  $ composer require ohdearapp/ohdear-php-sdk
  
  Open this page
  
  Notifications
  
  How to send each alert to the people who need it, on the channel they use.
  
  Channels you can send alerts to
  
  Email Slack Microsoft Teams Discord Google Chat Telegram SMS Pushover ntfy PagerDuty Opsgenie Webhooks
  
  Open this page
  
  Status pages
  
  How to set up a status page and keep your visitors informed during an incident.
  
  What the guide covers
  
  Setting up a status page
  
  Choosing which monitors it shows
  
  Posting updates during an incident
  
  Open this page
  
  FAQ
  
  Short answers to the questions people ask most often.
  
  Answers to common questions
  
  Uptime checks
  
  SSL certificates
  
  Notifications
  
  A search box for everything else
  
  Open this page
  
  Third-party integrations
  
  Services and tools, built by others, that work with Oh Dear.
  
  Tools that work with Oh Dear
  
  Integrations that are ready to use
  
  Integrations still being built
  
  Integrations we pay a bounty to have built
  
  Open this page
  
  Who uses Oh Dear
  
  Companies and projects that monitor their sites with Oh Dear.
  
  Teams that monitor with Oh Dear
  
  The companies and projects that use it
  
  In their own words
  
  Open this page
  
  State of Website Uptime
  
  What real outage data says about how often sites go down, and for how long.
  
  What the outage data shows
  
  Most outages are over in two minutes.
  
  Downtime does not keep office hours.
  
  Most sites go down at some point.
  
  Open this page
  
  Changelog
  
  Every product update and fix we ship.
  
  What changed recently
  
  New features
  
  Fixes and small improvements
  
  Open this page
  
  Security
  
  How Oh Dear protects your data, from encryption to the servers it runs on.
  
  How your data is protected
  
  Who is behind your data
  
  Encryption
  
  Infrastructure
  
  Open this page
  
  Contact
  
  Email addresses for support, billing and sales.
  
  How to reach us
  
  Support, on weekdays from 9:00 to 17:00 CET
  
  Billing and invoices
  
  Sales
  
  Open this page
  
  Affiliate program
  
  Earn money by recommending Oh Dear to your audience.
  
  How the program works
  
  Sign up for the affiliate program
  
  Promote Oh Dear to your audience
  
  Payouts start at €150
  
  Open this page
  
  Logos
  
  The Oh Dear logo, ready to download for articles and listings.
  
  Logos to download
  
  The logo as SVG and transparent PNG
  
  A white version for dark backgrounds
  
  A square icon for app directories
  
  Open this page
Blog
Contact