$ python start_app.py serving on http://127.0.0.1:8080 $ curl -H "X-Auth-Token:open-sesame" http://127.0.0.1:8080 Hello, welccome to paste $ curl -H "X-Auth-Token:bad-token" http://127.0.0.1:8080 <html> <head> <title>403 Forbidden</title> </head> <body> <h1>403 Forbidden</h1> Access was denied to this resource.<br /><br /> </body> </html>