UPDATE : This feature is no longer available
The following is a step by step procedure on how to setup a monitoring check in Pingdom and configuring an alerting webhook.
Login to AdNabu
Enable Campaign Monitoring
Once Logged in, you will be able to go to the monitoring dashboard. The dashboard will contain your adwords account details or in case of an MCC account all your accounts details. You can select which accounts you want to enable for monitoring. Once enabled you will be able to see the generated url along with the secret key which will serve as your alerting endpoint.
Signup in Pingdom
Create an Alerting Webhook
On the left sidebar you will see a tab called Alerting. Click on it and then click Alerting Endpoints. You will be have the following view on your screen. You can directly navigate to this link to access this page.
On the right hand top corner you will see a button to Add New endpoint. Click on it.
Give a name to it and click on Add Contact Method.
Go to the left sidebar and click on Dashboard. On the top right hand corner you will find an option to Add New.
Give a name to your check and your site url.