JSON URL

On the general setting of each email template you can add JSON URL with the contact parameters, before every email being sent we fetch the data from the JSON URL and you can use it inside the template

What you need to return:

{
"offline_key": "ofliine_value",
"key_name": "any value"
}

How to use what has been returned in the email template?

{{key_name}}

Where to place the link to the JSON URL in the email template?