Groups

C→S 2991 - RequestGroupInfo

Nitro: GROUP_INFO - Guild→GROUP. Source: RequestGuildInfoEvent, GroupInformationComposer

Requests detailed information about a specific guild by ID.

Body: (empty)

C→S 367 - RequestJoinedGroups

Nitro: GROUP_MEMBERSHIPS

Source: RequestOwnGuildsEvent, CatalogGroupsComposer

Requests the list of groups the current user is a member of.

Field	Type	Notes
(empty)	-	No body fields read

C→S 39 - SearchRoomsInGroup

Nitro: MY_GUILD_BASES_SEARCH Source: SearchRoomsInGroupEvent, MyGuildBasesSearchMessageComposer

Requests group rooms for the current user.

Body: (empty)

C→S 21 - RequestJoinedGroupBadges

Nitro: GROUP_BADGES

Source: GetHabboGuildBadgesMessageEvent, GetHabboGroupBadgesMessageComposer

Requests badge data for the guilds the current user belongs to.

Field	Type	Notes
(empty)	-	No body fields read

C→S 230 - CreateGroup

Nitro: GROUP_BUY

Source: RequestGuildBuyEvent, GroupBuyComposer

Requests the creation of a group with the proposed name and description.

Field	Type	Notes
name	string	Group name (word-filtered)
description	string	Group description (word-filtered)

C→S 798 - RequestGuildBuyRooms

Nitro: GROUP_CREATE_OPTIONS

Source: RequestGuildBuyRoomsEvent, GroupBuyDataComposer

Notes: Requests the list of rooms the user owns that can be used as a guild base.

Requests the list of rooms the user owns that can be used as a guild base room.

Field	Type	Notes
(empty)	-	No body fields read

C→S 998 - JoinGroup

Nitro: GROUP_REQUEST - Guild→GROUP; Join→REQUEST. Source: RequestGuildJoinEvent, GroupJoinComposer

Submits a request to join a guild by ID; depending on the guild's join policy, this either adds the user immediately or creates a pending membership request.

Body: (empty)

C→S 3386 - GuildAcceptMembership

Nitro: GROUP_REQUEST_ACCEPT

Source: GuildAcceptMembershipEvent, GroupMembershipAcceptComposer

Accepts a pending membership application for a guild.

Field	Type	Notes
groupId	int	ID of the guild
userId	int	Account ID of the applicant to accept

C→S 1894 - GuildDeclineMembership

Nitro: GROUP_REQUEST_DECLINE

Source: GuildDeclineMembershipEvent, GroupMembershipDeclineComposer

Declines a pending membership application for a guild.

Field	Type	Notes
groupId	int	ID of the guild
userId	int	Account ID of the request to decline

C→S 3593 - GuildConfirmRemoveMember

Nitro: GROUP_MEMBER_REMOVE_CONFIRM

Source: GuildConfirmRemoveMemberEvent, GroupConfirmRemoveMemberComposer

Confirms removal of a member from a guild (second step of the remove flow).

Field	Type	Notes
groupId	int	ID of the guild
userId	int	Account ID of the member to confirm removing

C→S 593 - GuildRemoveMember

Nitro: GROUP_MEMBER_REMOVE

Source: GuildRemoveMemberEvent, GroupRemoveMemberComposer

Removes a member from a guild.

Field	Type	Notes
groupId	int	ID of the guild
userId	int	Account ID of the member to remove

C→S 1004 - RequestGroupSettings

Nitro: GROUP_SETTINGS

Source: RequestGuildManageEvent, GroupSettingsComposer

Requests the management data for a guild (settings, colours, badge parts).

Field	Type	Notes
groupId	int	ID of the guild to manage

C→S 312 - RequestGroupMembers

Nitro: GROUP_MEMBERS - Guild→GROUP. Source: RequestGuildMembersEvent, GroupMembersComposer

Requests a paginated, optionally filtered member list for a guild.

Body:
  groupId:   int
  page:      int
  query:     string

C→S 813 - RequestGroupBadgeParts

Nitro: GROUP_PARTS / GroupBadgePartsComposer

Arcturus: RequestGuildPartsEvent

Requests the full catalogue of available guild badge parts (base shapes, symbols, and colour palettes) for the badge editor. Server replies with GuildParts (2238).

Body: (empty)

C→S 3137 - GuildChangeNameDesc

Nitro: GROUP_SAVE_INFORMATION

Source: GuildChangeNameDescEvent, GroupSaveInformationComposer

Saves a new name and description for a guild.

Field	Type	Notes
groupId	int	ID of the guild (implied from handle context)
newName	string	New guild name (word-filtered)
newDesc	string	New guild description (word-filtered)

C→S 3435 - GuildChangeSettings

Nitro: GROUP_SAVE_PREFERENCES

Source: GuildChangeSettingsEvent, GroupSavePreferencesComposer

Saves guild join policy and online member visibility settings.

Field	Type	Notes
groupId	int	ID of the guild
whoCanJoin	int	Join policy (0 = open, 1 = request, 2 = locked)
showOnlineMembers	int	0 = rights required, 1 = all members; read as == 0 boolean

C→S 1764 - GuildChangeColors

Nitro: GROUP_SAVE_COLORS

Source: GuildChangeColorsEvent, GroupSaveColorsComposer

Saves the primary and secondary colour selections for a guild.

Field	Type	Notes
groupId	int	ID of the guild
colorOne	int	Primary color index
colorTwo	int	Secondary color index

C→S 1991 - GuildChangeBadge

Nitro: GROUP_SAVE_BADGE

Source: GuildChangeBadgeEvent, GroupSaveBadgeComposer

Saves a new badge design (part IDs, colours, positions) for a guild.

Field	Type	Notes
groupId	int	ID of the guild
count	int	Number of badge parts that follow
parts[]	repeated	Per part: id:int, color:int, position:int

C→S 2894 - GuildSetAdmin

Nitro: GROUP_ADMIN_ADD

Source: GuildSetAdminEvent, GroupAdminGiveComposer

Promotes a guild member to admin rank.

Field	Type	Notes
groupId	int	ID of the guild
userId	int	Account ID of the member to promote

C→S 722 - GuildRemoveAdmin

Nitro: GROUP_ADMIN_REMOVE

Source: GuildRemoveAdminEvent, GroupAdminTakeComposer

Demotes a guild admin back to regular member rank.

Field	Type	Notes
groupId	int	ID of the guild
userId	int	Account ID of the member to demote

C→S 1134 - DeleteGroup

Nitro: GROUP_DELETE

Source: GuildDeleteEvent, GroupDeleteComposer

Permanently deletes a guild. Only the guild owner can do this.

Field	Type	Notes
groupId	int	ID of the guild to delete

C→S 3549 - GuildSetFavorite

Nitro: GROUP_FAVORITE - Guild→GROUP; Set dropped. Source: GuildSetFavoriteEvent, GroupFavoriteComposer

Sets a guild as the user's favourite, displaying its badge on their room unit.

Body: (empty)

C→S 1820 - GuildRemoveFavorite

Nitro: GROUP_UNFAVORITE

Source: GuildRemoveFavoriteEvent, GroupUnfavoriteComposer

Removes a guild from the user's favourite guilds list.

Field	Type	Notes
groupId	int	ID of the guild to un-favourite

C→S 1855 - GuildForumMarkAsRead

Nitro: UPDATE_FORUM_READ_MARKER Source: UpdateForumReadMarkerMessageComposer

Updates the read marker for one or more guild forum threads/posts.

Field	Type	Notes
count	int	Number of forum-read marker entries
[count × k]	int	Thread / post ID
[count × _arg_2]	int	Forum / group ID
[count × _arg_3]	bool	Read marker value

C→S 2908 - RequestPromotedRooms

Nitro: GET_UNREAD_FORUMS_COUNT

Source: RequestPromotedRoomsEvent, GetUnreadForumsCountMessageComposer

Notes: Nitro name GET_UNREAD_FORUMS_COUNT suggests this fetches unread forum counts, but the Arcturus handler is RequestPromotedRoomsEvent in the navigator package - discrepancy between Nitro intent and Arcturus routing.

Requests the unread forums count. Note: Arcturus routes this to RequestPromotedRoomsEvent - naming discrepancy with Nitro.

Field	Type	Notes
(empty)	-	No body fields read

C→S 882 - ApproveAllMembershipRequests

Nitro: APPROVE_ALL_MEMBERSHIP_REQUESTS Note: No Arcturus handler - Nitro only. Source: ApproveAllMembershipRequestsMessageComposer

Approves all pending membership requests for a guild in one operation. Nitro-only.

Field	Type	Notes
groupId	int	Guild ID whose pending membership requests should all be approved

C→S 2864 - GroupUnblockMember

Nitro: GROUP_UNBLOCK_MEMBER Note: No Arcturus handler - Nitro only. Source: UnblockGroupMemberMessageComposer

Unblocks a previously blocked guild member. Nitro-only.

Field	Type	Notes
groupId	int	Guild ID
userId	int	User ID of the member to unblock

C→S 2930 - GuildBaseSearch

Nitro: GUILD_BASE_SEARCH Note: No Arcturus handler - Nitro only. Source: GuildBaseSearchMessageComposer

Searches for group rooms. Nitro-only.

Field	Type	Notes
k	int	Guild / group ID to search base rooms for

S→C 1702 - GuildInfo

Source: GuildInfoComposer, GroupInformationEvent

Delivers full details for a guild: name, description, badge, owner, member counts, and whether the requesting user is a member or owner.

Body:
  groupId:       int
  name:          string
  description:   string
  roomId:        int
  badge:         string
  created:       string
  ownerId:       int
  ownerName:     string
  isOwner:       boolean
  isMember:      boolean
  memberCount:   int
  pendingCount:  int
  adminCount:    int
  homeRoomId:    int

S→C 420 - GuildList

Source: GuildListComposer, GuildMembershipsMessageEvent

Delivers the list of guilds the current user belongs to, including membership status, favourite flag, and online member counts.

Body:
  count: int
  [count]:
    groupId:    int
    name:       string
    badge:      string
    roomId:     int
    ownerId:    int
    memberCount: int
    onlineMemberCount: int
    isMember:   boolean
    isPending:  boolean
    isAdmin:    boolean

S→C 1200 - GuildMembers

Nitro: GROUP_MEMBERS Source: GuildMembersComposer, GroupMembersEvent

Delivers a paginated guild member list with group metadata (guild ID, name, badge, member count) wrapping the per-member entries sent via S→C 265.

S→C 265 - GroupMember

Nitro: GROUP_MEMBER Source: GuildMemberUpdateComposer

Delivers detailed data for a single guild member (rank, join date, online status).

This is the full member list page; see also the wrapping GROUP_MEMBERS (S→C 1200) which adds group metadata.

Field	Type	Notes
count	int	Number of members on this page
[count × entry]	-	Member entry
entry.rank	int	0=owner, 1=admin, 2=member, 3=requested, 4=deleted
entry.id	int	Account ID
entry.name	string	Username
entry.figure	string	Avatar figure string
entry.joinedAt	string	Join date string
isAdmin	boolean	Whether the requesting user is an admin
pageSize	int	Members per page
pageIndex	int	Current page index
level	int	Filter level (0=all, 1=admins, 2=pending)
query	string	Search query string

S→C 1180 - GroupMembershipRequested

Nitro: GROUP_MEMBERSHIP_REQUESTED Source: GroupMembershipRequestedMessageEvent

Notifies a guild admin that a new membership request has been submitted.

Field	Type	Notes
groupId	int	Guild ID for the membership request
member.id	int	Account ID of the requester
member.name	string	Requester username
member.figure	string	Requester figure string
member.joinedAt	string	Date string

S→C 1876 - GuildConfirmRemoveMember

Nitro: GROUP_MEMBER_REMOVE_CONFIRM

Source: GuildConfirmRemoveMemberComposer, GroupConfirmMemberRemoveEvent

Prompts the guild admin to confirm removal of a member.

Field	Type	Notes
userId	int	Account ID of the member being removed
furniCount	int	Number of guild furni the member has placed (may be returned)

S→C 762 - GuildJoinError

Nitro: GROUP_HABBO_JOIN_FAILED

Source: GuildJoinErrorComposer, HabboGroupJoinFailedMessageEvent

Reports that joining a guild failed (e.g. already a member, locked).

Field	Type	Notes
errorCode	int	Error code (e.g. 1 = HC required, 2 = guild full)

S→C 818 - GuildAcceptMemberError

Nitro: GUILD_MEMBER_MGMT_FAILED

Source: GuildAcceptMemberErrorComposer, GuildMemberMgmtFailedMessageEvent

Reports that accepting a guild membership request failed.

Field	Type	Notes
groupId	int	ID of the guild
errorCode	int	Error code

S→C 3988 - GuildEditFail

Nitro: GUILD_EDIT_FAILED

Source: GuildEditFailComposer, GuildEditFailedMessageEvent

Reports that a guild settings edit operation failed.

Field	Type	Notes
errorCode	int	Error code indicating what went wrong

S→C 1459 - GroupDetailsChanged

Nitro: GROUP_DETAILS_CHANGED Source: UnknownGuild2Composer, GroupDetailsChangedMessageEvent

Notifies clients in the guild's base room that guild settings (name, badge, colours) have changed.

Field	Type	Notes
groupId	int	Guild ID whose details changed

S→C 2445 - GuildRefreshMembersList

Nitro: GROUP_MEMBERS_REFRESH

Source: GuildRefreshMembersListComposer

Signals the client to refresh the guild members list.

Field	Type	Notes
groupId	int	ID of the guild
unknown	int	Always 0

S→C 2808 - GuildBought

Nitro: GROUP_PURCHASED

Source: GuildBoughtComposer, GroupPurchasedEvent

Confirms that a guild was successfully created, returning the new guild's ID and base room ID.

Field	Type	Notes
roomId	int	Room ID the guild was created for
groupId	int	Newly created guild's ID

S→C 2159 - GuildBuyRooms

Nitro: GROUP_CREATE_OPTIONS

Source: GuildBuyRoomsComposer, GroupBuyDataEvent

Notes: The trailing symbol/geometry data is hardcoded in Arcturus (5, 10, 3, 4, 25, 17, etc.) - static display hints for the badge editor UI.

Delivers the list of rooms the user owns that are eligible to be a guild base.

Field	Type	Notes
guildPrice	int	Cost in credits to create a guild
roomCount	int	Number of owned rooms available
rooms[]	repeated	Per room: roomId:int, roomName:string, unknown:boolean(false)
symbolCount	int	Always 5
symbolData[]	repeated	Static badge geometry data (5 × 3 ints each)

S→C 2238 - GuildParts

Nitro: GROUP_BADGE_PARTS

Source: GuildParts, GroupBadgePartsEvent

Delivers the list of available guild badge parts (bases, symbols, colours) for the badge editor.

Field	Type	Notes
baseCount	int	Number of base shapes
bases[]	repeated	Per base: id:int, valueA:string, valueB:string
symbolCount	int	Number of symbols
symbols[]	repeated	Per symbol: id:int, valueA:string, valueB:string
baseColorCount	int	Number of base colors
baseColors[]	repeated	Per color: id:int, valueA:string
symbolColorCount	int	Number of symbol colors
symbolColors[]	repeated	Per color: id:int, valueA:string
bgColorCount	int	Number of background colors
bgColors[]	repeated	Per color: id:int, valueA:string

S→C 3965 - GuildManage

Nitro: GROUP_SETTINGS

Source: GuildManageComposer, GroupSettingsEvent

Delivers the full guild management data (settings, colours, badge, member counts) for the admin panel.

Field	Type	Notes
unknown	int	Always 1
homeRoomId	int	Room ID of the guild base
homeRoomName	string	Name of the guild base room
unknown2	boolean	Always false
unknown3	boolean	Always true
groupId	int	ID of the guild
guildName	string	Name of the guild
description	string	Guild description
roomId	int	Room ID (repeated)
colorOne	int	Primary color index
colorTwo	int	Secondary color index
stateValue	int	Join policy (0=open, 1=request, 2=locked)
rightsPolicy	int	0 = all members get rights, 1 = admin only
unknown4	boolean	Always false
unknown5	string	Always empty
badgeCount	int	Number of badge parts
badgeParts[]	repeated	Per part: baseId:int, colorOrPos:int; extra int(0) if applicable

S→C 3129 - RemoveGuildFromRoom

Nitro: GROUP_DEACTIVATE

Source: RemoveGuildFromRoomComposer, HabboGroupDeactivatedMessageEvent

Notifies clients that a guild has been disassociated from the current room.

Field	Type	Notes
groupId	int	ID of the guild being removed/deactivated

S→C 3293 - GuildFurniWidget

Nitro: FURNITURE_GROUP_CONTEXT_MENU_INFO

Source: GuildFurniWidgetComposer, GroupFurniContextMenuInfoMessageEvent

Delivers guild data (badge, name, member count) for a guild furniture widget in the room.

Field	Type	Notes
itemId	int	ID of the guild furniture item
groupId	int	ID of the guild
guildName	string	Name of the guild
guildRoomId	int	Room ID of the guild base
userJoined	boolean	Whether the requesting user is a member
hasForum	boolean	Whether the guild has a forum

S→C 3403 - GuildFavoriteRoomUserUpdate

Nitro: FAVORITE_GROUP_UDPATE

Source: GuildFavoriteRoomUserUpdateComposer, FavoriteMembershipUpdateMessageEvent

Notes: Nitro constant has a typo: FAVORITE_GROUP_UDPATE (missing D). Sent when a user's favourite guild changes while in a room.

Notifies the client that a guild member's online/in-room status has changed for the favorite room display.

Field	Type	Notes
roomUnitId	int	Room unit ID of the user
groupId	int	Guild ID (0 if no favourite guild)
guildState	int	Guild membership state (3 if no guild)
guildName	string	Guild name (empty if no guild)

S→C 2402 - RoomUsersGuildBadges

Nitro: GROUP_BADGES

Source: RoomUsersGuildBadgesComposer, HabboGroupBadgesMessageEvent

Notes: Sent to clients in a room to display guild badges on room unit overlays.

Delivers the guild badge codes for all users currently in the room.

Field	Type	Notes
count	int	Number of guild badge entries
badges[]	repeated	Per entry: groupId:int, badgeCode:string

S→C 2379 - GroupForumUnreadCount

Nitro: GROUP_FORUM_UNREAD_COUNT Source: GuildForumsUnreadMessagesCountComposer, UnreadForumsCountMessageEvent

Delivers the count of unread guild forum posts across all the user's guilds.

Field	Type	Notes
count	int	Number of unread guild forum messages

S→C 324 - GroupForumUpdateMessage

Nitro: GROUP_FORUM_UPDATE_MESSAGE Source: PostUpdateMessageComposer, UpdateMessageMessageEvent

Delivers an updated or newly posted guild forum message, including author details, timestamp, and any admin action applied.

Field	Type	Notes
groupId	int	Guild ID
threadId	int	Forum thread ID
message.id	int	Message ID
message.authorId	int	Author account ID
message.authorName	string	Author username
message.authorFigure	string	Author figure string
message.timestamp	int	Unix timestamp
message.messageText	string	Message body text
message.adminAction	int	Admin action applied (0 = none)
message.reporterName	string	Name of reporter if reported