The REST API accepts token-based authentication.

Create Bearer Token

POST /Token

Input

Example (C#)

public static string GETToken(string clientID, string clientSecret)
{
    try
    {
        string url = WebConfigurationManager.AppSettings["GDPRAPIUrl"] + "Token";
        string responseFromServer = string.Empty;

        var webRequest = WebRequest.Create(url) as HttpWebRequest;

        if (webRequest != null)
        {
            webRequest.Method = "POST";
            webRequest.Timeout = WEB_REQUEST_TIMEUOT;

            webRequest.ContentType = "application/x-www-form-urlencoded";

            string postData = string.Format("grant_type=client_credentials&client_id={0}&client_secret={1}", clientID, clientSecret);
            byte[] buffer = Encoding.Default.GetBytes(postData);
            if (buffer != null)
            {
                webRequest.ContentLength = buffer.Length;
                webRequest.GetRequestStream().Write(buffer, 0, buffer.Length);
            }
        }

        using (WebResponse response = webRequest.GetResponse())
        {
            if (((HttpWebResponse)response).StatusCode == HttpStatusCode.OK)
            {
                using (Stream dataStream = response.GetResponseStream())
                using (StreamReader reader = new StreamReader(dataStream))
                responseFromServer = reader.ReadToEnd();

                if (!string.IsNullOrEmpty(responseFromServer))
                {
                    try
                    {
                        dynamic res = Newtonsoft.Json.JsonConvert.DeserializeObject(responseFromServer);

                        return res.access_token;
                    }
                    catch
                    {
                        throw;
                    }
                }
                else throw new Exception();

            }
            else throw new Exception();
        }
    }
    catch
    {
        return "ERR_NO_TOKEN";
    }
} 

Response

{
   "access_token": "",
   "token_type": "bearer",
   "expires_in": 1209599,
   "userName": "",
   "businessGuid": "",
   ".issued": "Tue, 03 Apr 2018 10:48:10 GMT",
   ".expires": "Tue, 17 Apr 2018 10:48:10 GMT"
}