diff --git a/lib/trmnl/api/dependencies.rb b/lib/trmnl/api/dependencies.rb
new file mode 100644
index 0000000..94fbd56
--- /dev/null
+++ b/lib/trmnl/api/dependencies.rb
@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+require "infusible"
+
+module TRMNL
+  # Defines endpoint dependencies for automatic injection.
+  module API
+    Dependencies = Infusible[Container]
+  end
+end