Android : Add website info in a new contact via intent?

I add informations to a new contact via intent in this way:

Intent intent = new Intent(Intents.Insert.ACTION);
intent.setType(ContactsContract.RawContacts.CONTENT_TYPE);
//...
intent.putExtra(Intents.Insert.NAME,"name");
intent.putExtra(ContactsContract.Intents.Insert.COMPANY,"company");
//...
startActivity(intent);

It works fine, but I want to add also website info. What's the "keyword" to use in "putExtra" for this?