diff --git a/lib/trmnl/api/container.rb b/lib/trmnl/api/container.rb
new file mode 100644
index 0000000..345de65
--- /dev/null
+++ b/lib/trmnl/api/container.rb
@@ -0,0 +1,36 @@
+# frozen_string_literal: true
+
+require "cogger"
+require "containable"
+require "http"
+
+module TRMNL
+  module API
+    # Registers application dependencies.
+    module Container
+      extend Containable
+
+      register(:client) { API::Client.new }
+      register(:logger) { Cogger.new id: "trmnl-api", formatter: :json }
+
+      register :http do
+        HTTP.default_options = ::HTTP::Options.new features: {logging: {logger: self[:logger]}}
+        HTTP
+      end
+
+      namespace :contracts do
+        register :current_screen, Contracts::CurrentScreen
+        register :display, Contracts::Display
+        register :firmware, Contracts::Firmware
+        register :setup, Contracts::Setup
+      end
+
+      namespace :models do
+        register :current_screen, Models::CurrentScreen
+        register :display, Models::Display
+        register :firmware, Models::Firmware
+        register :setup, Models::Setup
+      end
+    end
+  end
+end
diff --git a/spec/lib/trmnl/api/container_spec.rb b/spec/lib/trmnl/api/container_spec.rb
new file mode 100644
index 0000000..c4380bb
--- /dev/null
+++ b/spec/lib/trmnl/api/container_spec.rb
@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+require "spec_helper"
+
+RSpec.describe TRMNL::API::Container do
+  subject(:container) { described_class }
+
+  describe ".[]" do
+    it "answers HTTP" do
+      expect(container[:http]).to eq(HTTP)
+    end
+  end
+end
diff --git a/spec/support/shared_contexts/application_dependencies.rb b/spec/support/shared_contexts/application_dependencies.rb
new file mode 100644
index 0000000..f9d9d2a
--- /dev/null
+++ b/spec/support/shared_contexts/application_dependencies.rb
@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+RSpec.shared_context "with application dependencies" do
+  let(:logger) { Cogger.new id: "trmnl-api", io: StringIO.new, level: :debug }
+
+  before { TRMNL::API::Container.stub! http:, logger: }
+
+  after { TRMNL::API::Container.restore }
+end