Falcon is a WSGI-compliant web framework designed to build RESTful APIs without requiring external code library dependencies.
Building Very Fast App Backends with Falcon Web Framework on PyPy provides a walkthrough of a web API in Falcon that runs with PyPy and Nginx.
Asynchronous Tasks with Falcon and Celery shows how to configure Celery with the framework.
The official Falcon tutorial has a meaty guide for building and deploying your first Falcon web application.
Building Scalable RESTful APIs with Falcon and PyPy shows a to-do list example with Falcon running on PyPy.