diff --git a/lib/api_version.rb b/lib/api_version.rb
new file mode 100644
index 0000000..2d15488
--- /dev/null
+++ b/lib/api_version.rb
@@ -0,0 +1,10 @@
+class ApiVersion
+  def initialize(options={})
+    @version = options[:version]
+    @default = options[:default]
+  end
+
+  def matches?(req)
+    @default || req.headers['Accept'].include?("application/archiving.v#{@version}")
+  end
+end