I send it like this from C# language
http://127.0.0.3/in.php?key=123456&method=userrecaptcha&googlekey=6LfZil0UAAAAAAdm1Dpzsw9q0F11-bmervx9g5fE&pageurl=http://mysite.com/page/
The request is taken by capmonster but is not processed.
I attach the capmonster configuration captures