Talk:LlHTTPRequest
The following headers will be present, usable by scripts running on the HTTP server if the scripting language allows you to access the headers.
An PHP example on how to check to see if the call came from the main grid:
<?php if ($_SERVER["HTTP_X_SECONDLIFE_SHARD"] == "Production") { echo 'You are using the main grid'; } else { echo 'You are not using the main grid'; } ?>