HTTP API to JSON

Hi,
Just before upgrading to Frodo, I noted that the HTTP API has been removed.
Luckily I haven't upgraded yet as my remote control works with API.

The problem is that I have a keyboard.xml file in my setup and I use my remote to send keyboard keys to XBMC.
What is the equivalent of the HTTP API SendKey command in JSON?

(Please do not tell me to use Event Server as is too complex for me so it's not an option.)

My remote is Philips Pronto TSU9600 (programming in javascript language)

thanks