I don't think so, no. I don't believe we have access to DDC and LCC info from OCLC (their API is restricted with no way for Zotero to access it), so the add-on would have to handle authentication, too (assuming you have access). You could get LCC from LoC with relative ease, e.g. building on the existing PMID fetcher add-on
I don't believe we have access to DDC and LCC info from OCLC (their API is restricted with no way for Zotero to access it), so the add-on would have to handle authentication, too (assuming you have access). You could get LCC from LoC with relative ease, e.g. building on the existing PMID fetcher add-on