diff --git a/README.md b/README.md
index 55f572f..dd8b032 100644
--- a/README.md
+++ b/README.md
@@ -103,29 +103,26 @@ class AuthenticationHook
   # Registers the hook at a namespace with a key
   register_hook :some_namespace, :authentication
 
-  # Service is passed to an attach method
-  def self.attach(service)
-    # Typical Twirp service hooks
-    svc.before do |rack_env, env|
-      env[:user_id] = authenticate(rack_env)
-      env[:enviornment] = (ENV['ENVIRONMENT'] || :local).to_sym
-    end
+  # Typical Twirp service hook methods
+  def before(rack_env, env)
+    env[:user_id] = authenticate(rack_env)
+    env[:enviornment] = (ENV['ENVIRONMENT'] || :local).to_sym
+  end
 
-    svc.on_success do |env|
-      Stats.inc("requests.success")
-    end
+  def on_success(env)
+    Stats.inc("requests.success")
+  end
 
-    svc.on_error do |twerr, env|
-      Stats.inc("requests.error.#{twerr.code}")
-    end
+  def on_error(twerr, env)
+    Stats.inc("requests.error.#{twerr.code}")
+  end
 
-    svc.exception_raised do |e, env|
-      if env[:environment] == :local
-        puts "[Exception] #{e}"
-        puts e.backtrace.join("\n")
-      else
-        ExceptionTracker.send(e)
-      end
+  def exception_raised(e, env)
+    if env[:environment] == :local
+      puts "[Exception] #{e}"
+      puts e.backtrace.join("\n")
+    else
+      ExceptionTracker.send(e)
     end
   end
 end
diff --git a/lib/twirp/rails/helpers/hooks.rb b/lib/twirp/rails/helpers/hooks.rb
index 19757c7..05ac378 100644
--- a/lib/twirp/rails/helpers/hooks.rb
+++ b/lib/twirp/rails/helpers/hooks.rb
@@ -4,6 +4,8 @@ module Twirp
   module Rails
     module Helpers
       module Hooks
+        HOOK_METHODS = [:before, :on_success, :on_error, :exception_raised]
+
         def self.included(klass)
           klass.extend ClassMethods
         end
@@ -26,6 +28,40 @@ def register_hook(namespace, key)
 
             Twirp::Rails.hooks[namespace][key] = self
           end
+
+          def attach(service)
+            hook_instance = self.new
+
+            unless HOOK_METHODS.any? {|method| hook_instance.respond_to?(method)}
+              raise NotImplementedError.new(
+                "#{self.name} must implement one of the following methods: #{HOOK_METHODS.join(", ")}"
+              )
+            end
+
+            if hook_instance.respond_to?(:before)
+              service.before do |rack_env, env|
+                hook_instance.before(rack_env, env)
+              end
+            end
+
+            if hook_instance.respond_to?(:on_success)
+              service.on_success do |env|
+                hook_instance.on_success(env)
+              end
+            end
+
+            if hook_instance.respond_to?(:on_error)
+              service.on_error do |twerr, env|
+                hook_instance.on_error(twerr, env)
+              end
+            end
+
+            if hook_instance.respond_to?(:exception_raised)
+              service.exception_raised do |e, env|
+                hook_instance.exception_raised(e, env)
+              end
+            end
+          end
         end
       end
     end
diff --git a/lib/twirp/rails/version.rb b/lib/twirp/rails/version.rb
index 0d6fad5..6e6cb57 100644
--- a/lib/twirp/rails/version.rb
+++ b/lib/twirp/rails/version.rb
@@ -1,5 +1,5 @@
 module Twirp
   module Rails
-    VERSION = "0.2.0"
+    VERSION = "0.3.0"
   end
 end