I know for a fact that automatic citing used to work with URLs of articles hosted on https://ncbi.nlm.nih.gov, but now it no longer seems to, not even for the root website itself or any of its subdomains.
The last time I remember it working was no earlier than June 2019.
This issue also seems to extend to both PMIDs and PMCIDs.
Steps to Reproduce:
- Locate a medical article (or indeed any page) hosted on https://ncbi.nlm.nih.gov, such as PubMed articles.
- Edit a Wikipedia article then click the "Cite" button and paste the URL or PMC/PMID into the "Automatic" section.
- Click generate.
The dialogue box returns the error "We couldn't make a citation for you. You can create one manually using the "Manual" tab above."
It should generate the citation as normal, as it did before about June 2019.
DOIs and titles of articles hosted on https://ncbi.nlm.nih.gov still work to retrieve the article's citation.