diff --git a/lib/travis/web/app.rb b/lib/travis/web/app.rb
index 03538804..43e0de1b 100644
--- a/lib/travis/web/app.rb
+++ b/lib/travis/web/app.rb
@@ -1,43 +1,44 @@
 require 'rack'
 require 'rack/protection/path_traversal'
 
-module Travis::Web
-  class App
-    ASSET_DIRS = %r(/(styles|scripts)/)
+class Travis::Web::App
+  ASSET_DIRS = %r(/(styles|scripts)/)
 
-    autoload :Api,      'travis/web/app/api'
-    autoload :Assets,   'travis/web/app/assets'
-    autoload :Config,   'travis/web/app/config'
-    autoload :Files,    'travis/web/app/files'
-    autoload :Helpers,  'travis/web/app/helpers'
-    autoload :Filter,   'travis/web/app/filter'
-    autoload :Terminal, 'travis/web/app/terminal'
+  DEFAULT_ENDPOINT   = 'https://api.travis-ci.org'
+  DEFAULT_PUSHER_KEY = '23ed642e81512118260e'
 
-    Rack.autoload :SSL,      'rack/ssl'
-    Rack.autoload :Deflater, 'rack/deflater'
+  autoload :Api,      'travis/web/app/api'
+  autoload :Assets,   'travis/web/app/assets'
+  autoload :Config,   'travis/web/app/config'
+  autoload :Files,    'travis/web/app/files'
+  autoload :Helpers,  'travis/web/app/helpers'
+  autoload :Filter,   'travis/web/app/filter'
+  autoload :Terminal, 'travis/web/app/terminal'
 
-    include Terminal
+  Rack.autoload :SSL,      'rack/ssl'
+  Rack.autoload :Deflater, 'rack/deflater'
 
-    attr_accessor :app
+  include Terminal
 
-    def initialize
-      config = Config.new
-      announce(config)
+  attr_accessor :app
 
-      @app = Rack::Builder.app do
-        use Rack::SSL if config.production?
-        use Rack::Protection::PathTraversal
+  def initialize
+    config = Config.new
+    announce(config)
 
-        use Travis::Web::App::Api, config if config.run_api?
-        use Rack::Deflater if config.deflate?
-        use Travis::Web::App::Assets, config
-        use Travis::Web::App::Filter, config
-        run Travis::Web::App::Files.new
-      end
-    end
+    @app = Rack::Builder.app do
+      use Rack::SSL if config.production?
+      use Rack::Protection::PathTraversal
 
-    def call(env)
-      app.call(env)
+      use Travis::Web::App::Api, config if config.run_api?
+      use Rack::Deflater if config.deflate?
+      use Travis::Web::App::Assets, config
+      use Travis::Web::App::Filter, config
+      run Travis::Web::App::Files.new
     end
   end
+
+  def call(env)
+    app.call(env)
+  end
 end
diff --git a/lib/travis/web/app/config.rb b/lib/travis/web/app/config.rb
index 25b3b903..ea3eff19 100644
--- a/lib/travis/web/app/config.rb
+++ b/lib/travis/web/app/config.rb
@@ -1,6 +1,10 @@
 class Travis::Web::App
   class Config
-    OPTIONS = %w(ENV API_ENDPOINT CLIENT_ENDPOINT RUN_API WATCH DEFLATE)
+    OPTIONS = %w(ENV API_ENDPOINT CLIENT_ENDPOINT PUSHER_KEY RUN_API WATCH DEFLATE)
+
+    def [](key)
+      send(key)
+    end
 
     def keys
       @keys ||= OPTIONS.map(&:downcase)
@@ -25,13 +29,17 @@ class Travis::Web::App
     end
 
     def api_endpoint
-      config.fetch(:api_endpoint, run_api? ? '/api' : "https://api.travis-ci.org").gsub(/:\d+/, '')
+      config.fetch(:api_endpoint, run_api? ? '/api' : DEFAULT_API_ENDPOINT).gsub(/:\d+/, '')
     end
 
     def client_endpoint
       config.fetch(:client_endpoint, '/')
     end
 
+    def pusher_key
+      config.fetch(:pusher_key, DEFAULT_PUSHER_KEY)
+    end
+
     def deflate?
       !!config.fetch(:deflate, production?)
     end
diff --git a/lib/travis/web/app/filter.rb b/lib/travis/web/app/filter.rb
index 18eb2751..9df6f000 100644
--- a/lib/travis/web/app/filter.rb
+++ b/lib/travis/web/app/filter.rb
@@ -1,7 +1,7 @@
 class Travis::Web::App
   class Filter
-    autoload :Endpoint, 'travis/web/app/filter/endpoint'
-    autoload :Assets,   'travis/web/app/filter/assets'
+    autoload :Config, 'travis/web/app/filter/config'
+    autoload :Assets, 'travis/web/app/filter/assets'
 
     attr_reader :app, :config
 
@@ -21,11 +21,17 @@ class Travis::Web::App
       def filter(headers, body)
         headers.delete 'Content-Length' # why don't we just set this to the new length?
         filtered = []
-        body.each { |s| filtered << filters.inject(s) { |s, filter| filter.apply(s) } }
+        body.each { |chunk| filtered << filter_chunk(chunk) }
         body.close if body.respond_to?(:close)
         [headers, filtered]
       end
 
+      def filter_chunk(string)
+        filters.inject(string) do |string, filter|
+          filter.apply? ? filter.apply(string) : string
+        end
+      end
+
       def filters
         @filters ||= Filter.constants.map { |name| Filter.const_get(name).new(config) }
       end
diff --git a/lib/travis/web/app/filter/assets.rb b/lib/travis/web/app/filter/assets.rb
index 06df9539..91063fba 100644
--- a/lib/travis/web/app/filter/assets.rb
+++ b/lib/travis/web/app/filter/assets.rb
@@ -1,29 +1,35 @@
-class Travis::Web::App::Filter
-  class Assets
-    attr_reader :config
+class Travis::Web::App
+  class Filter
+    class Assets
+      attr_reader :config
 
-    def initialize(config)
-      @config = config
-    end
-
-    def apply(string)
-      string = version(string)
-      string = minify(string) # if config.production?
-      string
-    end
-
-    private
-
-      def version(string)
-        string.gsub(Travis::Web::App::ASSET_DIRS) do
-          "/#{config.version}/#{$1}/"
-        end
+      def initialize(config)
+        @config = config
       end
 
-      def minify(string)
-        string.gsub(%r((/javascripts/.*).js)) do
-          "#{$1}.min.js/"
-        end
+      def apply?
+        true
       end
+
+      def apply(string)
+        string = version(string)
+        string = minify(string) if config.production?
+        string
+      end
+
+      private
+
+        def version(string)
+          string.gsub(Travis::Web::App::ASSET_DIRS) do
+            "/#{config.version}/#{$1}/"
+          end
+        end
+
+        def minify(string)
+          string.gsub(%r((/javascripts/.*).js)) do
+            "#{$1}.min.js/"
+          end
+        end
+    end
   end
 end
diff --git a/lib/travis/web/app/filter/config.rb b/lib/travis/web/app/filter/config.rb
new file mode 100644
index 00000000..47eb5674
--- /dev/null
+++ b/lib/travis/web/app/filter/config.rb
@@ -0,0 +1,24 @@
+class Travis::Web::App
+  class Filter
+    class Config
+      CONFIG_TAG = %r(<meta (rel|name)="([^"]*)" (href|value)="([^"]*)"[^>]*>)
+
+      attr_reader :config
+
+      def initialize(config)
+        @config = config
+      end
+
+      def apply?
+        config.api_endpoint != DEFAULT_ENDPOINT ||
+        config.pusher_key   != DEFAULT_PUSHER_KEY
+      end
+
+      def apply(string)
+        string.gsub(CONFIG_TAG) do
+          %(<meta #{$1}="#{$2}" #{$3}="#{config[$2.split('.').last]}">)
+        end
+      end
+    end
+  end
+end
diff --git a/lib/travis/web/app/filter/endpoint.rb b/lib/travis/web/app/filter/endpoint.rb
deleted file mode 100644
index 72e23bcc..00000000
--- a/lib/travis/web/app/filter/endpoint.rb
+++ /dev/null
@@ -1,19 +0,0 @@
-class Travis::Web::App::Filter
-  class Endpoint
-    DEFAULT_ENDPOINT = 'https://api.travis-ci.org'
-
-    attr_reader :config
-
-    def initialize(config)
-      @config = config
-    end
-
-    def apply(string)
-      apply? ? string.gsub(DEFAULT_ENDPOINT, config.api_endpoint) : string
-    end
-
-    def apply?
-      config.api_endpoint != DEFAULT_ENDPOINT
-    end
-  end
-end
diff --git a/public/index.html b/public/index.html
index 3fb08040..4a22cdb1 100644
--- a/public/index.html
+++ b/public/index.html
@@ -3,6 +3,7 @@
   <head>
     <meta charset="UTF-8">
     <meta rel="travis.api_endpoint" href="https://api.travis-ci.org">
+    <meta name="travis.pusher_key" value="23ed642e81512118260e">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>Travis CI - Distributed Continuous Integration Platform for the Open Source Community</title>
     <link rel="icon" type="image/png" href="/favicon.ico">