Thanks to this tweeter for reminding us of this great little blog post from PagerDuty’s past - this is a fun way to familiarize yourself with a simple API-based integration on a service and run some tests as you’re learning about Escalation Policies, Notification Rules, and the like.
Meow!
That was me…thank you! I love using OKCats to onboard new Engineers when they start support shifts. It helps lessen the anxiety of being on call.
I think it’s broken again…sad cat!
Looks like we’ve changed security settings on pagerduty.com since last fixed it. Will think about how to get this working again and keep you posted.
I’ve converted this tool to a PagerDuty Add-on. You can set it up in your account by going to Configuration → Extensions → Add-ons and clicking 
New Add-on. Set the name to OkCats (or whatever you prefer) and the URL to:
https://pagerduty.github.io/addons/OkCats/index.html
Which will produce this:
