Context

Currently Citoid cannot retrieve metadata from a link to a pdf.

Zotero does this, but there's no support for the feature in translation-server: https://www.zotero.org/support/retrieve_pdf_metadata

Example requests failing:

• http://query.nytimes.com/mem/archive-free/pdf?res=FB0610FF3F5912738DDDAC0A94D8415B858CF1D3 . ( does not fail, at least recognizes NYT as source and creates a Cite_web reference )
• https://publications.lib.chalmers.se/records/fulltext/150863.pdf ( Fails with Unable to cite PDFs; unsupported media type )
• https://arxiv.org/pdf/2007.13238 ( Fails with Unable to cite PDFs; unsupported media type )
• https://www.nature.com/articles/s41467-026-70127-6.pdf ( Fails with Unable to cite PDFs; unsupported media type )
• https://www.pnas.org/doi/pdf/10.1073/pnas.2108146119 ( Creates a Cite_web reference with DOI links )

Note, that for the latter, the translation-server returns more information including authors and title. But that might be a different issue.

There is an open bug for this in translation-server here: https://github.com/zotero/translation-server/issues/70