It is possible to change the Payment Response URL every single time a purchase token is sent through to us, by including a dynamic URL variable to the purchase token.
To include the dynamic URL variable within your purchase token you must prefix the variable name with either "M_" or "MC_" and then include the URL as the value of the variable, for example:
<input type="hidden" name="MC_callback" value="http://www.myserver.com/mycallbackscript.cgi">
For further information about how to add your own variables to the purchase token, please refer to your integration guide.
By including the Payment Response URL within the purchase token, you have created a security risk as someone can now send a spoof Payment Message to the URL, we therefore recommend that you always validate that the Payment Message was actually send by us.
Once included in your purchase token you will need to configure your installation to accept the dynamic URL variable, refer to Configuring your installation to accept a dynamic payment response.
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