Log in to your customerio account.
Move your mouse pointer to left side of customer.io dashboard and select Integrations tab
Now click on Customer.io API
Now note down your site id and api key.
Now log in to your callhippo account and go to the integrations tab.
Click on +integrate button of customerio.
Now you will be redirected to another page. Click on +connect your cutomerio.
Now enter the details you noted in the above steps.
Now click on save. It should say Datasource is linked.
Click on okay. And click on next
You should now be redirected to callhippo account and your status would be changed to Integrated.