diff --git a/src/pjdietz/WellRESTed/Handler.php b/src/pjdietz/WellRESTed/Handler.php
index 24d89d4..d8bfec3 100644
--- a/src/pjdietz/WellRESTed/Handler.php
+++ b/src/pjdietz/WellRESTed/Handler.php
@@ -73,9 +73,9 @@ abstract class Handler implements HandlerInterface
     }
 
     /**
-     * @param \pjdietz\WellRESTed\Request $request
+     * @param RequestInterface $request
      */
-    public function setRequest($request)
+    public function setRequest(RequestInterface $request)
     {
         $this->request = $request;
     }
@@ -91,7 +91,7 @@ abstract class Handler implements HandlerInterface
     /**
      * Return the instance's Reponse
      *
-     * @return Response
+     * @return ResponseInterface
      */
     public function getResponse()
     {
diff --git a/src/pjdietz/WellRESTed/HandlerInterface.php b/src/pjdietz/WellRESTed/HandlerInterface.php
index 43eab70..583b6de 100644
--- a/src/pjdietz/WellRESTed/HandlerInterface.php
+++ b/src/pjdietz/WellRESTed/HandlerInterface.php
@@ -2,10 +2,14 @@
 
 namespace pjdietz\WellRESTed;
 
+/**
+ * Interface for a creating a response in reaction to a respond or arguments.
+ * @package pjdietz\WellRESTed
+ */
 interface HandlerInterface
 {
     public function getRequest();
-    public function setRequest($request);
+    public function setRequest(RequestInterface $request);
     public function getArguments();
     public function setArguments(array $args);
     public function getResponse();
diff --git a/src/pjdietz/WellRESTed/Request.php b/src/pjdietz/WellRESTed/Request.php
index 850bc0f..edbdfba 100644
--- a/src/pjdietz/WellRESTed/Request.php
+++ b/src/pjdietz/WellRESTed/Request.php
@@ -29,7 +29,7 @@ namespace pjdietz\WellRESTed;
  * @property array query  Associative array of query parameters
  * @property array uri  Full URI (protocol, hostname, path, etc.)
  */
-class Request extends Message
+class Request extends Message implements RequestInterface
 {
     /**
      * The Hostname for the request (e.g., www.google.com)
diff --git a/src/pjdietz/WellRESTed/RequestInterface.php b/src/pjdietz/WellRESTed/RequestInterface.php
new file mode 100644
index 0000000..3b6e4ec
--- /dev/null
+++ b/src/pjdietz/WellRESTed/RequestInterface.php
@@ -0,0 +1,15 @@
+<?php
+
+namespace pjdietz\WellRESTed;
+
+/**
+ * Interface for representing an HTTP request.
+ * @package pjdietz\WellRESTed
+ */
+interface RequestInterface
+{
+    public function getMethod();
+    public function setMethod($method);
+    public function getUri();
+    public function setUri($uri);
+}
diff --git a/src/pjdietz/WellRESTed/Response.php b/src/pjdietz/WellRESTed/Response.php
index d580469..4d60926 100644
--- a/src/pjdietz/WellRESTed/Response.php
+++ b/src/pjdietz/WellRESTed/Response.php
@@ -21,7 +21,7 @@ use \InvalidArgumentException;
  * @property-read string statusLine HTTP status line, e.g. "HTTP/1.1 200 OK"
  * @property-read bool success True if the status code is 2xx
  */
-class Response extends Message
+class Response extends Message implements ResponseInterface
 {
     /**
      * Text explanation of the HTTP Status Code. You only need to set this if
diff --git a/src/pjdietz/WellRESTed/ResponseInterface.php b/src/pjdietz/WellRESTed/ResponseInterface.php
new file mode 100644
index 0000000..cf9e888
--- /dev/null
+++ b/src/pjdietz/WellRESTed/ResponseInterface.php
@@ -0,0 +1,12 @@
+<?php
+
+namespace pjdietz\WellRESTed;
+
+/**
+ * Interface for representing an HTTP response.
+ * @package pjdietz\WellRESTed
+ */
+interface ResponseInterface
+{
+    public function respond();
+}
\ No newline at end of file
diff --git a/src/pjdietz/WellRESTed/RouteInterface.php b/src/pjdietz/WellRESTed/RouteInterface.php
index 6528408..cd5b5be 100644
--- a/src/pjdietz/WellRESTed/RouteInterface.php
+++ b/src/pjdietz/WellRESTed/RouteInterface.php
@@ -4,6 +4,7 @@ namespace pjdietz\WellRESTed;
 
 /**
  * Interface for a route to relate a pattern for matching a URI to a handler class.
+ * @package pjdietz\WellRESTed
  */
 interface RouteInterface
 {