"err_code": 49 "err": "Access Denied"

[ndlang]

Trying to use postman to test API calls to Pardot but keep getting this error from the title.
Full Error:
{
"@attributes": {
"stat": "fail",
"version": 1,
"err_code": 49
},
"err": "Access Denied"
}

I am able to successfully get an API key from a post call in Postman, but cannot query the data.

URL:
https://pi.pardot.com/api/list/version/3/do/query?user_key=<user_key>&api_key=<api_key>&format=json&fields=created_at,id,name,updated_at&id_greater_than=0&sort_by=id&sort_order=ascending

[creuzerm]

You are using GET parameters along with the AUTH variables.

This is the new correct behavior of the API by the Pardot server under the new AUTH requirements to my understanding.
http://developer.pardot.com/#using-the-api

An example of how to do this now if the tool is using CURL:
curl_setopt($curl_handle, CURLOPT_HTTPHEADER, array("Authorization: Pardot api_key={<api_key>}, user_key={<user_key>}"));