diff --git a/demo/app.py b/demo/app.py
new file mode 100644
index 0000000..2f44926
--- /dev/null
+++ b/demo/app.py
@@ -0,0 +1,8 @@
+# py-scopes/demo/app.py
+
+def demo_app(environ, start_response):
+    status = '200 OK'
+    headers = [("Content-type", "text/plain; charset=utf-8")]
+    start_response(status, headers)
+    return ['Hello World'.encode()]
+
diff --git a/demo/config.py b/demo/config.py
new file mode 100644
index 0000000..c4f2668
--- /dev/null
+++ b/demo/config.py
@@ -0,0 +1,9 @@
+# py-scopes/demo/config.py
+
+from dotenv import load_dotenv
+from os import getenv
+
+load_dotenv()
+
+server_port = getenv('SERVER_PORT', '8999')
+
diff --git a/demo/main.py b/demo/main.py
new file mode 100644
index 0000000..4eef565
--- /dev/null
+++ b/demo/main.py
@@ -0,0 +1,9 @@
+# py-scopes/demo/main.py
+
+import config
+
+from app import demo_app
+import server
+
+server.run(demo_app, config)
+
diff --git a/demo/server.py b/demo/server.py
new file mode 100644
index 0000000..aabed33
--- /dev/null
+++ b/demo/server.py
@@ -0,0 +1,12 @@
+# py-scopes/demo/server.py
+
+from wsgiref.simple_server import make_server
+
+def run(app, config):
+    port = int(config.server_port)
+    with make_server('', port, app) as httpd:
+        print(f'Serving on port {port}.')
+        try:
+            httpd.serve_forever()
+        except KeyboardInterrupt:
+            print('Shutting down.')
diff --git a/pyproject.toml b/pyproject.toml
index 226e1b5..02a3fe6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,4 +19,9 @@ dependencies = [
 ]
 
 [project.optional-dependencies]
+demo = ["python-dotenv"]
 test = ["pytest"]
+
+[tool.setuptools]
+packages = ["scopes"]
+