diff --git a/app/controllers/api/v1/api_controller.rb b/app/controllers/api/v1/api_controller.rb
index 81e5ee5..f2d62a5 100644
--- a/app/controllers/api/v1/api_controller.rb
+++ b/app/controllers/api/v1/api_controller.rb
@@ -1,6 +1,8 @@
 class Api::V1::ApiController < ActionController::API
+##### Doorkeeper
     include Doorkeeper::Rails::Helpers
 
+##### Errors
     rescue_from ActiveRecord::RecordInvalid, with: :render_unprocessable_entity_response
     rescue_from ActiveRecord::RecordNotDestroyed, with: :render_unprocessable_entity_response
     rescue_from ActiveRecord::RecordNotFound, with: :render_not_found_response
@@ -8,11 +10,39 @@ class Api::V1::ApiController < ActionController::API
     rescue_from ActiveRecord::RecordNotUnique, with: :render_unprocessable_entity_response
     rescue_from ActionController::ParameterMissing, with: :render_unprocessable_entity_response
 
+##### Hooks
     before_action :current_user
+    before_action :set_default_content_type
 
-    # Assign the current user if the Doorkeeper token isn't nil
+##### Responders
+    respond_to :json
+
+##### Methods
+    # Assign the current user if the Doorkeeper token isn't nil, then
+    # update the current user's last seen datetime and last IP address
+    # before returning
     def current_user
         @current_user ||= User.find(doorkeeper_token.resource_owner_id) if doorkeeper_token
+        @current_user.update_last_ip_and_last_seen!(request.remote_ip) if @current_user
+
+        return @current_user
+    end
+
+    # Set the response content-type
+    def set_content_type(content_type)
+        response.headers["Content-Type"] = content_type
+    end
+
+    # Set the default response content-type to application/javascript
+    # with a UTF-8 charset
+    def set_default_content_type
+        set_content_type("application/javascript; charset=utf-8")
+    end
+
+    def current_user
+        @current_user ||= User.find(doorkeeper_token.resource_owner_id) if doorkeeper_token
+        @current_user.update_last_ip_and_last_seen!(request.remote_ip) if @current_user
+
         return @current_user
     end
 
@@ -22,7 +52,7 @@ class Api::V1::ApiController < ActionController::API
         render action: 'errors', status: :unprocessable_entity
     end
 
-    def render_not_found_response(exception)
+    def render_not_found_response
         response = { errors: [{ message: "Record could not be found.", code: "not_found" }]}
         render 'not_found', status: :not_found
     end
@@ -31,4 +61,9 @@ class Api::V1::ApiController < ActionController::API
         render action: 'errors', status: :unauthorized
     end
 
+    private
+
+    def restrict_access
+        raise UnauthorizedError unless current_user
+    end
 end
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