Your question does not make any sense.
FileMaker does not leverage bees or any other life form to work.
Clear english will get you a better response.
"Api" is Italian for "bees" (and of course, English for API).
So I'm guessing user4423 has issue with an API running on an internal server, while it works on an internal server.
To start with, which API are you using - PHP?
You can always start by checking firewalls, that IP:s resolve properly, etc... Difficult to say much without more info.