[movcel]

Searching the web I found that by vbulletin API using the following url can be registered users.

The problem that arises is that not where the parameter is achieved:
api_c, api_s, api_sig, api_v.

http://www.yourforumurl.com/api.php?...alue1&a=value2

From the example, you'll see:
api.php specific params are prefixed with 'api_'
api_m = method name
api_c = ClientID.
api_s = Access token.
api_sig = signature of the request
api_v = the api version called by the request
b = value1 & a = value2 are the HTTP GET params accepted by the method (forum_markread) of the API

It is a different vbulletin website, what you want is that when they sign on my external to vbulletin system at the same time to implement a function to register with the same user data in the forum of vbulletin, but for that you need to know as the token and secret field of user table is generated