diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..84fd7ca
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+/.env.rb
+/hyde/
diff --git a/proto.rb b/proto.rb
index 456127a..d87a22b 100644
--- a/proto.rb
+++ b/proto.rb
@@ -1,6 +1,12 @@
 # frozen_string_literal: true
 
+require 'weakref'
+
 module Heimdall
+  # Protocol error class
+  class ProtoError < StandardError
+  end
+
   # Container for any uniquely identifiable object
   # @abstract
   class UUIDObject
@@ -18,43 +24,92 @@ module Heimdall
 
       # Create a new UUIDObject with unique UUID
       # @return [self]
-      def new
-        object = super
+      def new(*args, **params)
+        object = super(*args, **params)
         @uuids[object.uuid] = object
         @last = object.uuid
-        @foreign_ids[object.foreign_id] = object if object.foreign_id
+        add_foreign(object.foreign_ids, object)
         object
       end
 
+      # Delete an object found by UUID
+      # @param uuid [Integer]
+      # @return [void]
+      def delete(uuid)
+        obj = @uuids[uuid]
+        return false unless obj
+
+        @uuids.delete(obj.uuid)
+        obj.foreign_ids.each { |x| @foreign_ids.delete(x) }
+        true
+      end
+
+      # Delete an object found by foreign id
+      # @param foreign_id [String]
+      # @return [void]
+      def delete_foreign(foreign_id)
+        obj = @foreign_ids[foreign_id]
+        return false unless obj
+
+        @uuids.delete(obj.uuid)
+        obj.foreign_ids.each { |x| @foreign_ids.delete(x) }
+        true
+      end
+
       # Get object by UUID
-      # @param uuid
+      # @param uuid [Integer]
       # @return [self, nil]
       def get(uuid)
         @uuids[uuid] if @uuids[uuid].is_a? self
       end
 
       # Get object by foreign id
-      # @param foreign_id
+      # @param foreign_id [String]
       # @return [self, nil]
       def get_foreign(foreign_id)
         @foreign_ids[foreign_id] if @foreign_ids[foreign_id].is_a? self
       end
 
+      # Add foreign ids to the list of known foreign ids
+      # @param foreign [Array<String>]
+      # @return [void]
+      def add_foreign(foreign, obj)
+        foreign.each do |f_id|
+          @foreign_ids[check_foreign(f_id)] = obj
+        end
+      end
+
+      # Check a foreign id for valid syntax
+      # @param foreign [String]
+      # @return [String]
+      def check_foreign(foreign)
+        if foreign_ids.include?(foreign)
+          raise ProtoError, 'foreign id already exists'
+        end
+
+        unless foreign.match?(/^([\w_]+):.*$/)
+          raise ProtoError, 'invalid foreign id syntax'
+        end
+
+        foreign
+      end
+
       attr_accessor :uuids, :foreign_ids, :last
     end
 
     def initialize
       @uuid = __gen_uuid
       @foreign_ids = []
+      @foreign_ids.append(@id) if @id
     end
 
-    attr_reader :uuid, :foreign_id
+    attr_reader :uuid, :foreign_ids
 
     private
 
     def __gen_uuid
       newuuid = (Time.now.to_f * 1000).to_i * 10000
-      if (self.class.last / 1000) == (newuuid / 1000)
+      if self.class.last && (self.class.last / 1000) == (newuuid / 1000)
         newuuid += (self.class.last % 1000) + 1
       end
       newuuid
@@ -103,13 +158,14 @@ module Heimdall
   # Message struct
   class Message < UUIDObject
     def initialize(datahash, **params)
-      super(**params)
-
+      @id = datahash["id"]
       @from = UUIDObject.get(datahash["from"])
       @to = UUIDObject.get(datahash["to"])
       @content = datahash["content"]
       # @reply_to = datahash["reply_to"] # TODO: make this make sense
       @attachments = datahash["attachments"]
+
+      super(**params)
     end
 
     attr_reader :from, :to, :content, :reply_to, :attachments
@@ -117,8 +173,51 @@ module Heimdall
 
   # User struct
   class User < UUIDObject
-    def initialize(datahash, **params)
-      super(**params)
+    DEFAULT_AVATAR = ""
 
+    def initialize(datahash, **params)
       @id = datahash["id"]
+      @username = datahash["username"]
+      @nickname = datahash["nickname"]
+      @avatar = datahash["avatar"] || self.class::DEFAULT_AVATAR
+
+      super(**params)
+    end
+
+    # Convert user data to a JSON struct
+    # @return [String] JSON struct
+    def to_struct
+      JSON.dump({
+                  "id" => @id,
+                  "username" => @username,
+                  "nickname" => @nickname,
+                  "avatar" => @avatar
+                })
+    end
+  end
+
+  # Channel struct
+  class Channel < UUIDObject
+    DEFAULT_AVATAR = ""
+
+    def initialize(datahash, **params)
+      @id = datahash["id"]
+      @name = datahash["name"] or @id
+      @avatar = datahash["avatar"] || self.class::DEFAULT_AVATAR
+
+      super(**params)
+    end
+
+    # Convert channel data to a JSON struct
+    # @return [String] JSON struct
+    def to_struct
+      JSON.dump({
+                  "id" => @id,
+                  "name" => @name,
+                  "avatar" => @avatar
+                })
+    end
+  end
+
+  VERSION = "1.0"
 end
diff --git a/server.ru b/server.ru
index c5ca920..119cbd6 100644
--- a/server.ru
+++ b/server.ru
@@ -8,6 +8,8 @@ require 'json'
 # Primary server class
 class HeimdallServer < Landline::App
   before do
+    header "content-type", "application/json"
+
     # Match data type against a list of datatypes
     # @param obj [Object]
     # @param type [Array, Class]
@@ -23,41 +25,103 @@ class HeimdallServer < Landline::App
     # @param args [Hash] hash of key - type pairs to check JSON data against
     def validate_json(**args)
       die(400, backtrace: ['JSON body expected']) unless json?
-      data = begin
+      @data = begin
         JSON.parse(request.body)
       rescue StandardError
         die(400, backtrace: ['JSON body is invalid'])
       end
       args.each do |k, v|
-        unless data.include?(k) and match_type(data[k], v)
-          die(400, backtrace: ["Key #{k} is missing"])
+        unless match_type(@data[k], v)
+          die(400, backtrace: ["Key #{k} of type #{v} is missing"])
         end
       end
     end
   end
 
   filter do
-    request.cookies["token"] == BOT_TOKEN
+    defined? ::BOT_TOKEN ? request.cookies["token"] == ::BOT_TOKEN : true
+  end
+
+  get "/version" do
+    JSON.dump({
+                "version" => Heimdall::VERSION
+              })
+  end
+
+  pipeline do |request, &output|
+    output.call(request)
+  rescue Heimdall::ProtoError => e
+    throw :finish, [400,
+                    { "content-type": "application/json" },
+                    JSON.dump({
+                                "error" => e.message,
+                                "code" => 400
+                              })]
+  end
+
+  read_delete = proc do |cls|
+    get "/foreign/*" do |id|
+      user = cls.get_foreign(id)
+      user&.to_struct or die(400, backtrace: ["#{cls} not found"])
+    end
+
+    get "/uuid/*" do |id|
+      user = cls.get(id.to_i)
+      user&.to_struct or die(400, backtrace: ["#{cls} not found"])
+    end
+
+    delete "/foreign/*" do |id|
+      if cls.delete_foreign(id)
+        JSON.dump({ "code" => 200 })
+      else
+        die(400, backtrace: ["#{cls} not found"])
+      end
+    end
+
+    delete "/uuid/*" do |id|
+      if cls.delete(id.to_i)
+        JSON.dump({ "code" => 200 })
+      else
+        die(400, backtrace: ["#{cls} not found"])
+      end
+    end
   end
 
   path "/user" do
     post "/register" do
-      validate_json("id" => Integer,
+      validate_json("id" => String,
                     "username" => String,
-                    "nickname" => [String, NilClass])
-      
+                    "nickname" => [String, NilClass],
+                    "avatar" => [String, NilClass])
+      new_user = Heimdall::User.new(@data)
+      JSON.dump({ "uuid": new_user.uuid })
     end
+
+    instance_exec(Heimdall::User, &read_delete)
   end
 
-  handle do |status, backtrace: nil|
-    page = JSON.dump({
-                       "error" => backtrace.join("\n"),
-                       "code" => status
-                     })
-    [{
-      "content-length": page.bytesize,
-      "content-type": "application/json"
-    }, page]
+  path "/channel" do
+    post "/register" do
+      validate_json("id" => String,
+                    "name" => String,
+                    "avatar" => [String, NilClass])
+      new_channel = Heimdall::Channel.new(@data)
+      JSON.dump({ "uuid": new_channel.uuid })
+    end
+
+    instance_exec(Heimdall::Channel, &read_delete)
+  end
+
+  handle do |status, backtrace: nil, **_|
+    backtrace ||= [Landline::Util::HTTP_STATUS[status]]
+    [status,
+     {
+       "content-type": "application/json"
+     },
+     JSON.dump({
+                 "error" => (backtrace || []).join("\n"),
+                 "code" => status
+               })]
   end
 end