You can add a URL in the long_description (e.g. to https://read-the-docs.readthedocs.org/ )

It'd be useful to mention that here:
https://packaging.python.org/tutorials/distributing-packages/

It would sure be great to be able to express with structured data that a project has [Sphinx] docs at a particular URL. It'd then be possible to discover and search docs for each project automatically.

http://markmail.org/search/?q=project-url+documentation+list%3Aorg.python.distutils-sig

"[Distutils] Provide separate development and documentation URLs in PyPI metadata?"

http://markmail.org/search/?q=project-url+documentation+list%3Aorg.python.distutils-sig#query:project-url%20documentation%20list%3Aorg.python.distutils-sig+page:1+mid:e2ilbaevv2s3fl2j+state:results

On Sunday, August 27, 2017, Ronald Oussoren <ronaldoussoren@mac.com> wrote:
Hi,

Is it possible to create a documentation in the section with “Project Links” on the page describing a release on PyPI.org? That is, can I add some metadata to an sdist or wheel that would add an entry to that list, and if so how? I’m using setuptools to create the distribution artefacts.

The reason I ask is that I currently use an index.html on pythonhosted.org that redirects to the real documentation because that adds a link to the documentation when looking at the release on pypi.python.org. That doesn’t work pypi.org.   

Ronald