diff --git a/Gemfile.lock b/Gemfile.lock
index 3e2ea84..465bbfc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -43,7 +43,7 @@ GEM
     fiber-storage (1.0.1)
     fiddle (1.1.8)
     gosu (1.4.6)
-    io-endpoint (0.17.1)
+    io-endpoint (0.17.2)
     io-event (1.14.2)
     io-stream (0.11.1)
     ircparser (1.0.0)
@@ -97,4 +97,4 @@ DEPENDENCIES
   win32-security
 
 BUNDLED WITH
-   2.6.8
+  4.0.3
diff --git a/lib/api.rb b/lib/api.rb
index 1d33121..a7d4d6e 100644
--- a/lib/api.rb
+++ b/lib/api.rb
@@ -16,32 +16,7 @@ class W3DHub
     ].freeze
 
     def self.on_thread(method, *args, &callback)
-      raise "Renew."
-      BackgroundWorker.foreground_job(-> { Api.send(method, *args) }, callback)
-    end
-
-    class Response
-      def initialize(error: nil, status: -1, body: "")
-        @status = status
-        @body = body
-        @error = error
-      end
-
-      def success?
-        @status == 200
-      end
-
-      def status
-        @status
-      end
-
-      def body
-        @body
-      end
-
-      def error
-        @error
-      end
+      Api.send(method, *args, &callback)
     end
 
     #! === W3D Hub API === !#
@@ -50,7 +25,9 @@ class W3DHub
 
     HTTP_CLIENTS = {}
 
-    def self.async_http(method, path, headers = DEFAULT_HEADERS, body = nil, backend = :w3dhub)
+    def self.async_http(method, path, headers = DEFAULT_HEADERS, body = nil, backend = :w3dhub, &callback)
+      raise "NO CALLBACK DEFINED!" unless callback
+
       case backend
       when :w3dhub
         endpoint   = W3DHUB_API_ENDPOINT
@@ -79,24 +56,7 @@ class W3DHub
         headers << ["authorization", "Bearer #{Store.account.access_token}"]
       end
 
-      Sync do
-        begin
-          response = provision_http_client(endpoint).send(method, path, headers, body)
-
-          Response.new(status: response.status, body: response.read)
-        rescue Async::TimeoutError => e
-          logger.error(LOG_TAG) { "Connection to \"#{url}\" timed out after: #{API_TIMEOUT} seconds" }
-
-          Response.new(error: e)
-        rescue StandardError => e
-          logger.error(LOG_TAG) { "Connection to \"#{url}\" errored:" }
-          logger.error(LOG_TAG) { e }
-
-          Response.new(error: e)
-        ensure
-          response&.close
-        end
-      end
+      Store.network_manager.request(method, url, headers, body, nil, &callback)
     end
 
     def self.provision_http_client(hostname)
@@ -114,17 +74,17 @@ class W3DHub
       HTTP_CLIENTS[Thread.current][hostname.downcase] = Async::HTTP::Client.new(endpoint)
     end
 
-    def self.post(path, headers = DEFAULT_HEADERS, body = nil, backend = :w3dhub)
-      async_http(:post, path, headers, body, backend)
+    def self.post(path, headers = DEFAULT_HEADERS, body = nil, backend = :w3dhub, &callback)
+      async_http(:post, path, headers, body, backend, &callback)
     end
 
-    def self.get(path, headers = DEFAULT_HEADERS, body = nil, backend = :w3dhub)
-      async_http(:get, path, headers, body, backend)
+    def self.get(path, headers = DEFAULT_HEADERS, body = nil, backend = :w3dhub, &callback)
+      async_http(:get, path, headers, body, backend, &callback)
     end
 
     # Api.get but handles any URL instead of known hosts
-    def self.fetch(path, headers = DEFAULT_HEADERS, body = nil, backend = nil)
-      async_http(:get, path, headers, body, backend)
+    def self.fetch(path, headers = DEFAULT_HEADERS, body = nil, backend = nil, &callback)
+      async_http(:get, path, headers, body, backend, &callback)
     end
 
     # Method: POST
@@ -142,27 +102,27 @@ class W3DHub
     #
     # On a failed login the service responds with:
     # {"error":"login-failed"}
-    def self.refresh_user_login(refresh_token, backend = :w3dhub)
+    def self.refresh_user_login(refresh_token, backend = :w3dhub, &callback)
       body = URI.encode_www_form("data": JSON.dump({refreshToken: refresh_token}))
-      response = post("/apis/launcher/1/user-login", FORM_ENCODED_HEADERS, body, backend)
+      post("/apis/launcher/1/user-login", FORM_ENCODED_HEADERS, body, backend) do |result|
+        if result.okay?
+          user_data = JSON.parse(result.data, symbolize_names: true)
 
-      if response.status == 200
-        user_data = JSON.parse(response.body, symbolize_names: true)
+          return false if user_data[:error]
 
-        return false if user_data[:error]
+          user_details_data = user_details(user_data[:userid]) || {}
 
-        user_details_data = user_details(user_data[:userid]) || {}
-
-        Account.new(user_data, user_details_data)
-      else
-        logger.error(LOG_TAG) { "Failed to fetch refresh user login:" }
-        logger.error(LOG_TAG) { response }
-        false
+          Account.new(user_data, user_details_data)
+        else
+          logger.error(LOG_TAG) { "Failed to fetch refresh user login:" }
+          logger.error(LOG_TAG) { response }
+          false
+        end
       end
     end
 
     # See #user_refresh_token
-    def self.user_login(username, password, backend = :w3dhub)
+    def self.user_login(username, password, backend = :w3dhub, &callback)
       body = URI.encode_www_form("data": JSON.dump({username: username, password: password}))
       response = post("/apis/launcher/1/user-login", FORM_ENCODED_HEADERS, body, backend)
 
@@ -184,7 +144,7 @@ class W3DHub
     # /apis/w3dhub/1/get-user-details
     #
     # Response: avatar-uri (Image download uri), id, username
-    def self.user_details(id, backend = :w3dhub)
+    def self.user_details(id, backend = :w3dhub, &callback)
       body = URI.encode_www_form("data": JSON.dump({ id: id }))
       user_details = post("/apis/w3dhub/1/get-user-details", FORM_ENCODED_HEADERS, body, backend)
 
@@ -200,15 +160,15 @@ class W3DHub
     # /apis/w3dhub/1/get-service-status
     # Service response:
     # {"services":{"authentication":true,"packageDownload":true}}
-    def self.service_status(backend = :w3dhub)
-      response = post("/apis/w3dhub/1/get-service-status", DEFAULT_HEADERS, nil, backend)
-
-      if response.status == 200
-        ServiceStatus.new(response.body)
-      else
-        logger.error(LOG_TAG) { "Failed to fetch service status:" }
-        logger.error(LOG_TAG) { response }
-        false
+    def self.service_status(backend = :w3dhub, &callback)
+      response = post("/apis/w3dhub/1/get-service-status", DEFAULT_HEADERS, nil, backend) do |result|
+        if result.okay?
+          ServiceStatus.new(result.data)
+        else
+          logger.error(LOG_TAG) { "Failed to fetch service status:" }
+          logger.error(LOG_TAG) { response }
+          false
+        end
       end
     end
 
@@ -216,7 +176,7 @@ class W3DHub
     # Client sends an Authorization header bearer token which is received from logging in (Optional)
     # Launcher sends an empty data request: data={}
     # Response is a list of applications/games
-    def self.applications(backend = :w3dhub)
+    def self.applications(backend = :w3dhub, &callback)
       response = post("/apis/launcher/1/get-applications", DEFAULT_HEADERS, nil, backend)
 
       if response.status == 200
@@ -301,7 +261,7 @@ class W3DHub
     # Client sends an Authorization header bearer token which is received from logging in (Optional)
     # Client requests news for a specific application/game e.g.: data={"category":"ia"} ("launcher-home" retrieves the weekly hub updates)
     # Response is a JSON hash with a "highlighted" and "news" keys; the "news" one seems to be the desired one
-    def self.news(category, backend = :w3dhub)
+    def self.news(category, backend = :w3dhub, &callback)
       body = URI.encode_www_form("data": JSON.dump({category: category}))
       response = post("/apis/w3dhub/1/get-news", FORM_ENCODED_HEADERS, body, backend)
 
@@ -319,7 +279,7 @@ class W3DHub
 
     # /apis/launcher/1/get-package-details
     # client requests package details: data={"packages":[{"category":"games","name":"apb.ico","subcategory":"apb","version":""}]}
-    def self.package_details(packages, backend = :w3dhub)
+    def self.package_details(packages, backend = :w3dhub, &callback)
       body = URI.encode_www_form("data": JSON.dump({ packages: packages }))
       response = post("/apis/launcher/1/get-package-details", FORM_ENCODED_HEADERS, body, backend)
 
@@ -339,14 +299,15 @@ class W3DHub
     # client requests package: data={"category":"games","name":"ECW_Asteroids.zip","subcategory":"ecw","version":"1.0.0.0"}
     #
     # server responds with download bytes, probably supports chunked download and resume
-    def self.package(package, &block)
-      Cache.fetch_package(package, block)
+    # FIXME: REFACTOR Cache.fetch_package to use HttpClient
+    def self.package(package, &callback)
+      Cache.fetch_package(package, callback)
     end
 
     # /apis/w3dhub/1/get-events
     #
     # clients requests events: data={"serverPath":"apb"}
-    def self.events(app_id, backend = :w3dhub)
+    def self.events(app_id, backend = :w3dhub, &callback)
       body = URI.encode_www_form("data": JSON.dump({ serverPath: app_id }))
       response = post("/apis/w3dhub/1/get-server-events", FORM_ENCODED_HEADERS, body, backend)
 
@@ -381,15 +342,25 @@ class W3DHub
     #     id, name, score, kills, deaths
     #   ...players[]:
     #     nick, team (index of teams array), score, kills, deaths
-    def self.server_list(level = 1, backend = :gsh)
-      response = get("/listings/getAll/v2?statusLevel=#{level}", DEFAULT_HEADERS, nil, backend)
+    def self.server_list(level = 1, backend = :gsh, &callback)
+      handler = lambda do |result|
+        unless result.okay?
+          callback.call(false)
+          next
+        end
 
-      if response.status == 200
-        data = JSON.parse(response.body, symbolize_names: true)
-        return data.map { |hash| ServerListServer.new(hash) }
+        data = JSON.parse(result.data, symbolize_names: true)
+        callback.call(data.map { |hash| ServerListServer.new(hash) })
       end
 
-      false
+      get("/listings/getAll/v2?statusLevel=#{level}", DEFAULT_HEADERS, nil, backend, &handler)
+
+      # if response.status == 200
+      #   data = JSON.parse(response.body, symbolize_names: true)
+      #   callback&.call(data.map { |hash| ServerListServer.new(hash) })
+      # end
+
+      # callback&.call(false)
     end
 
     # /listings/getStatus/v2/:id?statusLevel=#{0-2}
@@ -403,7 +374,7 @@ class W3DHub
     #     id, name, score, kills, deaths
     #   ...players[]:
     #     nick, team (index of teams array), score, kills, deaths
-    def self.server_details(id, level, backend = :gsh)
+    def self.server_details(id, level, backend = :gsh, &callback)
       return false unless id && level
 
       response = get("/listings/getStatus/v2/#{id}?statusLevel=#{level}", DEFAULT_HEADERS, nil, backend)
@@ -419,7 +390,7 @@ class W3DHub
     # /listings/push/v2/negotiate?negotiateVersion=1
     ##? /listings/push/v2/?id=#{websocket token?}
     ## Websocket server list listener
-    def self.server_list_push(id)
+    def self.server_list_push(id, &callback)
     end
   end
 end
diff --git a/lib/api/server_list_updater.rb b/lib/api/server_list_updater.rb
index ddeffdf..6dbd0cf 100644
--- a/lib/api/server_list_updater.rb
+++ b/lib/api/server_list_updater.rb
@@ -23,7 +23,7 @@ class W3DHub
         @invocation_id = 0
 
         logger.info(LOG_TAG) { "Starting emulated SignalR Server List Updater..." }
-        run
+        # run
       end
 
       def run
@@ -32,7 +32,8 @@ class W3DHub
             begin
               @auto_reconnect = true
 
-              while W3DHub::BackgroundWorker.alive?
+              # FIXME
+              while true #W3DHub::BackgroundWorker.alive?
                 connect if @auto_reconnect
                 sleep @reconnection_delay
               end
@@ -54,19 +55,31 @@ class W3DHub
         @auto_reconnect = false
 
         logger.debug(LOG_TAG) { "Requesting connection token..." }
-        response = Api.post("/listings/push/v2/negotiate?negotiateVersion=1", Api::DEFAULT_HEADERS, "", :gsh)
 
-        if response.status != 200
+        result = nil
+        Api.post("/listings/push/v2/negotiate?negotiateVersion=1", Api::DEFAULT_HEADERS, "", :gsh) do |callback_result|
+          result = callback_result
+        end
+
+        # FIXME: we've introduced ourselves to callback hell, yay!
+        while result.nil?
+          sleep 0.1
+        end
+
+        if result.error?
           @auto_reconnect = true
-          @reconnection_delay = @reconnection_delay * 2
+          @reconnection_delay *= 2
           @reconnection_delay = 60 if @reconnection_delay > 60
+
           return
         end
 
         @reconnection_delay = 1
 
-        data = JSON.parse(response.body, symbolize_names: true)
+        connect_websocket(JSON.parse(result.data, symbolize_names: true))
+      end
 
+      def connect_websocket(data)
         @invocation_id = 0 if @invocation_id > 9095
         id = data[:connectionToken]
         endpoint = "#{Api::SERVER_LIST_ENDPOINT}/listings/push/v2?id=#{id}"
diff --git a/lib/network_manager.rb b/lib/network_manager.rb
index d44596d..131a748 100644
--- a/lib/network_manager.rb
+++ b/lib/network_manager.rb
@@ -5,6 +5,7 @@ class W3DHub
     Request = Struct.new(:context, :callback)
     Context = Data.define(
       :request_id,
+      :method,
       :url,
       :headers,
       :body,
@@ -12,52 +13,42 @@ class W3DHub
     )
 
     def initialize
-      @requests = {}
+      @requests = []
+      @running = true
 
-      @ractor = Ractor.new do
-        raise "Something has gone quite wrong!" if Ractor.main?
+      Thread.new do
+        http_client = HttpClient.new
 
-        queue = []
-        api_client = ApiClient.new
+        Sync do
+          while @running
+            request = @requests.shift
 
-        # Ractor has no concept of non-blocking send/receive... :cry:
-        Thread.new do
-          while (context = Ractor.receive) # blocking
-            # we cannot (easily) ensure we always are receive expected data
-            next unless context.is_a?(Context)
-
-            queue << context
-          end
-        end
-
-        Async do
-          loop do
-            context = queue.shift
-
-            # goto sleep for an instant if there is no work to be doing
-            unless context
-              sleep 0.1
+            # goto sleep for an second if there is no work to be doing
+            unless request
+              sleep 1
               next
             end
 
-            Sync do
-              result = api_client.handle(context)
+            Async do |task|
+              assigned_request = request
+              result = http_client.handle(task, assigned_request)
 
-              Ractor.yield(NetworkEvent.new(context, result))
+              pp [assigned_request, result]
+
+              Store.main_thread_queue << -> { assigned_request.callback.call(result) }
             end
           end
         end
       end
-
-      monitor
     end
 
-    def add_request(url, headers, body, bearer_token, &block)
+    def request(method, url, headers, body, bearer_token, &block)
       request_id = SecureRandom.hex
 
-      @requests << Request.new(
+      request = Request.new(
         Context.new(
           request_id,
+          method,
           url,
           headers,
           body,
@@ -66,31 +57,9 @@ class W3DHub
         block
       )
 
-      @ractor.send(context)
+      @requests << request
 
       request_id
     end
-
-    def monitor
-      raise "Something has gone quite wrong!!!" unless Ractor.main?
-
-      # Thread that spends its days sleeping **yawn**
-      Thread.new do
-        while (event = @ractor.take)
-          pp event
-
-          next unless event.is_a?(NetworkEvent)
-
-          request = @request.find { |r| r.context.request_id == event.context.request_id }
-
-          next if request
-
-          @requests.delete(request)
-          result = event.result
-
-          Store.main_thread_queue << ->(result) { request.callback(result) }
-        end
-      end
-    end
   end
 end
diff --git a/lib/network_manager/api_client.rb b/lib/network_manager/api_client.rb
deleted file mode 100644
index 917bfe1..0000000
--- a/lib/network_manager/api_client.rb
+++ /dev/null
@@ -1,9 +0,0 @@
-class W3DHub
-  class NetworkManager
-    # Api reimplemented in a Ractor friendly manner
-    class ApiClient
-      def initialize
-      end
-    end
-  end
-end
diff --git a/lib/network_manager/http_client.rb b/lib/network_manager/http_client.rb
new file mode 100644
index 0000000..a891d1c
--- /dev/null
+++ b/lib/network_manager/http_client.rb
@@ -0,0 +1,61 @@
+class W3DHub
+  class NetworkManager
+    # non-blocking, http requests.
+    class HttpClient
+      def initialize
+        @http_clients = {}
+      end
+
+      def handle(task, request)
+        result = CyberarmEngine::Result.new
+        context = request.context
+
+        task.with_timeout(30) do
+          uri = URI(context.url)
+
+          pp uri
+
+          response = provision_http_client(uri.origin).send(
+            context.method,
+            uri.path,
+            context.headers,
+            context.body
+          )
+
+          pp response
+
+          if response.success?
+            result.data = response.body.read
+          else
+            result.error = response
+          end
+        rescue Async::TimeoutError => e
+          result.error = e
+        rescue StandardError => e
+          result.error = e
+        ensure
+          response&.close
+        end
+
+        result
+      end
+
+      def provision_http_client(hostname)
+        return @http_clients[hostname.downcase] if @http_clients[hostname.downcase]
+
+        ssl_context = W3DHub.ca_bundle_path ? OpenSSL::SSL::SSLContext.new : nil
+        ssl_context&.set_params(
+          ca_file: W3DHub.ca_bundle_path,
+          verify_mode: OpenSSL::SSL::VERIFY_PEER
+        )
+
+        endpoint = Async::HTTP::Endpoint.parse(hostname, ssl_context: ssl_context)
+        @http_clients[hostname.downcase] = Async::HTTP::Client.new(endpoint)
+      end
+
+      def wrapped_error(error)
+        WrappedError.new(error.class, error.message.to_s, error.backtrace)
+      end
+    end
+  end
+end
diff --git a/lib/states/boot.rb b/lib/states/boot.rb
index 92cbca4..0651288 100644
--- a/lib/states/boot.rb
+++ b/lib/states/boot.rb
@@ -175,7 +175,11 @@ class W3DHub
       end
 
       def service_status
+        @status_label.value = "Checking service status..." #I18n.t(:"server_browser.fetching_server_list")
+
         Api.on_thread(:service_status) do |service_status|
+          pp service_status
+
           @service_status = service_status
 
           if @service_status
diff --git a/w3d_hub_linux_launcher.rb b/w3d_hub_linux_launcher.rb
index d30fdf2..04b9d11 100644
--- a/w3d_hub_linux_launcher.rb
+++ b/w3d_hub_linux_launcher.rb
@@ -113,7 +113,7 @@ require_relative "lib/hardware_survey"
 require_relative "lib/game_settings"
 require_relative "lib/websocket_client"
 require_relative "lib/network_manager"
-require_relative "lib/network_manager/api_client"
+require_relative "lib/network_manager/http_client"
 require_relative "lib/application_manager"
 require_relative "lib/application_manager/manifest"
 require_relative "lib/application_manager/status"