Hi, I just went to that URL and it is not up right now.  Below is what I get when I go that site.   

Just so you know the site that we get the roster from is separate from the game servers.

Data.lotro.com

• Documentation

API Methods

Character Sheet - charactersheet

Returns character sheet information.

Format: /{DEVELOPER_NAME}/{API_KEY}/charactersheet/w/{WORLDNAME}/c/{CHARACTERNAME}/

• w - World Name (Required): Name of the character's world.
• c - Character Name (Required): Name of the character.

Guild Roster - guildroster

Returns guild information and roster.

Format: /{DEVELOPER_NAME}/{API_KEY}/guildroster/w/{WORLDNAME}/g/{GUILDNAME}/

• w - World Name (Required): Name of the guild's world.
• g - Guild Name (Required): Name of the guild.

Item - item

Returns item information.

Format: /{DEVELOPER_NAME}/{API_KEY}/item/id/{ITEMID}/

• id - Item ID (Required): The ID of the item