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from $2.40 / 1,000 successful lookups

Crossref DOI Lookup — Canonical Citation Metadata API

Look up DOIs against Crossref's official metadata API — the canonical source publishers register citation data with. Get title, full author list with ORCID and affiliation, journal, publisher, ISSN, license, and reference/citation counts. Pay only for DOIs that resolve.

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from $2.40 / 1,000 successful lookups

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Adrian Voss

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Crossref Scraper | 13 Fields, 50K Works/Run, No API Key

themineworks/crossref-scholarly-metadata

Scrape 150M+ scholarly works from Crossref: DOIs, authors, journals & citation counts by topic, year and type. Clean structured JSON for bibliometrics, literature reviews and RAG. No API key. Use it as an MCP server in Claude, ChatGPT & AI agents.

The Mine Works

Crossref Scraper

crawlerbros/crossref-scraper

Scrape Crossref, the world's largest DOI registry. Search 130M+ scholarly works, fetch by DOI, filter by date / type / journal, and pull authors, references, citation counts, ISSN, ORCIDs, and more.

Crawler Bros

Crossref Academic Paper Search

ryanclinton/crossref-paper-search

Search over 150 million scholarly works indexed by Crossref -- the largest open registry of DOI metadata in the world. Retrieve structured publication data including titles, authors with ORCID identifiers, citation counts, journal names, funding information, abstracts, and more. No API key required.

Ryan Clinton

Crossref Scholarly Papers Scraper – DOI Metadata

ninhothedev/crossref-scraper

$0.5/1K 🔥 Fast Crossref scraper! Scholarly works by search or DOI — title, authors, journal, citations & abstract. No key. JSON, CSV, Excel or API in seconds. Pull thousands for literature reviews & bibliometrics ⚡

ninhothedev

Crossref Scraper — DOI Metadata for Academic Papers

openclawmara/crossref-scraper

Scrape Crossref — largest DOI registry for academic literature. Modes: search works, DOI lookup, journal metadata, funder info, affiliation search. Extracts titles, authors, DOIs, ISSN, references, citations. Official REST API, no auth, 50 req/sec. For research & citation analysis.

OpenClaw Mara

Crossref Works Scraper

neuton/crossref-works-scraper

Search Crossref scholarly works by query or DOI. Extract titles, authors, publishers, journals, publication dates, DOI URLs, references, licenses, and citation counts.

Neuton Scripts

Academic Research MCP | 6 Tools: OpenAlex, PubMed, arXiv

themineworks/academic-research-mcp

Scholarly search for AI agents: OpenAlex works, Crossref metadata, arXiv preprints, OpenCitations graphs and PubMed, behind one MCP endpoint. No result, no charge.

The Mine Works

Crossref Scholarly Scraper — DOIs, Citations & Journals

logiover/crossref-scraper

Scrape Crossref by keyword, ISSN, or DOI list. Extract title, authors, DOI, citations, journal, publisher, funding, license for research, bibliometrics, and academic analysis. No API key required.

Logiover

Crossref Scholarly Works Fetcher

brunofin/crossref-scholarly-works-fetcher

Fetch metadata for scholarly works (papers, articles, books) from the official Crossref REST API. Query by URL/DOI, keyword search, publication date range, work type, or ISSN. No API key required. Ideal for research pipelines, citation graphs, and LLM data prep.

Bruno Finger

OpenAlex Research Radar — Impact, Funders & Competitors

ryanclinton/openalex-research-search

Understand a research field in one run: landmark and rising papers by field-normalized impact (FWCI), the institution and funder graph, who's winning, and where the opportunities are. Deterministic research intelligence, not raw rows.

Ryan Clinton