Return comprehensive metadata for an academic paper searched by title.

Queries Semantic Scholar first (richest metadata), then falls back to arXiv.

Returns JSON with: title, authors, abstract, year, venue, doi, arxiv_id, semantic_scholar_id, citation_count, reference_count, fields_of_study, publication_types, publication_date, is_open_access, open_access_pdf, tldr.

Args: params (PaperInput): { paper_title: str }

Returns: str: JSON-encoded metadata dict or { "error": "..." }.

Find the best open-access PDF URL for a paper by title.

Source priority: Semantic Scholar OA → arXiv PDF → Unpaywall → gomcp browser.

Returns JSON with: pdf_url, source, title, year. May include browser_excerpt if gomcp fallback was used.

Args: params (PaperInput): { paper_title: str }

Returns: str: JSON-encoded result or { "error": "..." }.

Retrieve the full text of a paper by title (up to 50,000 characters).

Fetch order: arXiv HTML5 renderer → gomcp browser → abstract-only fallback.

Returns JSON with: title, abstract, tldr, fulltext (str|null), fulltext_length (int), source.

Args: params (PaperInput): { paper_title: str }

Returns: str: JSON-encoded result or { "error": "..." }.

Return up to 100 papers that cite the given paper (forward citations).

Returns JSON with: paper_title, total_citations, returned, citations (list of {title, authors, year, venue, doi, arxiv_id, citation_count}).

Args: params (PaperInput): { paper_title: str }

Returns: str: JSON-encoded citations or { "error": "..." }.

Return the bibliography of a paper — the papers it cites (backward citations).

Returns JSON with: paper_title, total_references, returned, references (list of {title, authors, year, venue, doi, arxiv_id}).

Args: params (PaperInput): { paper_title: str }

Returns: str: JSON-encoded references or { "error": "..." }.

Resolve a DOI to comprehensive paper metadata from multiple authoritative sources.

This is the reverse of paper_get_metadata: given a DOI you already know, retrieve everything about the paper without needing its title.

Data is merged from three complementary sources (all queried in parallel):

1. Crossref — canonical DOI registry; best for bibliographic data, publisher, volume/issue/page, funders, license.

2. Semantic Scholar — adds citation count, references, fields of study, TL;DR, and open-access PDF link.

3. Unpaywall — adds detailed open-access status and every known PDF URL.

Returns a merged JSON object with: doi, title, abstract, authors, year, publication_date, venue, publisher, volume, issue, page, type, subjects, issn, funders, license, citation_count, reference_count, is_referenced_by_count, fields_of_study, tldr, publication_types, is_open_access, oa_status, open_access_pdf, oa_locations (list of all known PDF URLs with host_type / version / license), arxiv_id, semantic_scholar_id, sources (list of which APIs responded successfully)

Args: params (DoiInput): { doi: str } Accepts bare DOI or full URL, e.g.: "10.1145/3442188.3445922" "https://doi.org/10.1145/3442188.3445922"

Returns: str: JSON-encoded metadata dict or { "error": "..." }.