To use ZScaler ZIA integration in n8n, start by adding the HTTP Request node to your workflow canvas and authenticate it using a predefined credential type. This allows you to perform custom operations, without additional authentication setup. Once connected, you can make custom API calls to ZScaler ZIA to query the data you need using the URLs you provide, for example: you can create records in ZScaler ZIA by sending a POST request through the HTTP Request node, specifying the appropriate endpoint and including the required payload in JSON format. For updating records, use a PUT request with the record ID in the URL and the updated data in the body. To retrieve data, use a GET request with the specific API endpoint to pull necessary information, leveraging query parameters as needed to filter results.