http://ojjkf327pcmivwuk4zcl4a5lgsbv64p7kosbzmf3xdkzuuqqwxuv7xad.onion/index.php/Main_Page
Services can go down temporarily, so we keep track of when they do and maintain a list of dead hidden services. In addition to an onion simply being gone (Tor cannot resolve the onion), sites that display 404 (and use a known onion/URL based hosting service) are the only other thing that is considered truly DOWN.