A site must be created prior to making any of the standard API calls. A unique site should be created for each unique Merchant ID (MID).
Endpoint
The following endpoint can be used to add or update sites. You must replace the {base_url} variable.
POST
{base_url}/api/v3/site/addUpdate
The same endpoint is used to add or update a site. If a site already exists with the {external_id} , the site will be updated otherwise it will be inserted.