now the new user api is available!

You can access this api by the url:
SI Classic: http://api.spaceinvasion.info/api/user.php
SI2: http://api2.spaceinvasion.info/api/user.php

You need to add some GET Parameters too:

output: json, xml or csv
instance: retro nexus, int2 (GeNeSIS), int3 (EcoWars), root (Classic Invasion), si2, si2speed,
userID or username: contains the userID or the urlencoded username of the requested user

the result is the placement + some user information.

Notice:
to change the language of achievements titles and descriptions use the lang parameter with the 2 characters country code. for example:
&lang=de
&lang=ru
&lang=en

Fallback is english (en)
You also can handle this by provide the language http header
(HTTP_ACCEPT_LANGUAGES), first possible language will used.

We will upgrade this api when we have new user functions or other apis.

best regards
Dschibait