The IPQS Postback API allows you to alter previous Email Verification API requests to our API based on new or additional data to receive a new fraud score. You can also update aspects of an email request after it happens, such as confirming the conversion date and conversion status.

You can make requests to this API via POST or GET. Parameters passed to the API wrapped as an update[] array will update the original request. The API will use any parameters outside of the update[] array to look up the request.
While we recommend using the original request_id for all postback requests, we understand that not every caller can store the ID for each request. As a result, the API allows you to use custom variables instead. For the postback update to succeed, you must establish any custom tracking variables in your account settings before passing them with your initial request.
Below is your base postback URL:

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Using the request_id to update the transactionID

Assume a request had a request_id of DWwJ and you wanted to update the transactionID associated with that request to be 100. You would make the following request to the API:

Using custom variables to update the transactionID

Assume you wanted to update the transactionID associated with a request to be 100, but you don't know the request_id of that request. You can instead look up the request using a custom variable.