I am looking to generate automatic documentation for the REST API of a Flask project. I can't locate the sphinx extension sphinxcontrib.autohttp.flask anywhere and it does not seem to come bundled with sphinx. When I run sphinx I get :

Extension error:
Could not import extension sphinxcontrib.autohttp.flask (exception: No module named sphinxcontrib.autohttp.flask)

Can somebody give me a pointer to where to find it?