diff --git a/config/routes.rb b/config/routes.rb
index 10a6b1a..e9da409 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -1,5 +1,11 @@
 Rails.application.routes.draw do
 
+  # Rails' built-in health check endpoint. Returns 200 when the app boots with
+  # no exceptions, 500 otherwise. Responds with an HTML page (browsers/bots) or
+  # a JSON body (Accept: application/json), so uptime monitors, load balancers,
+  # and JSON clients are all covered by the same endpoint.
+  get "up" => "rails/health#show", as: :rails_health_check
+
   get 'home/index'
   get 'home/privacy'
   root :to => "home#index"