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Academic & Research
Scholarly search, citation and open-access APIs.
JSON: /api/v1/directory.json (filter on category=academic-research)
arXiv API
Search and fetch metadata for millions of open-access preprints in science and maths.
FreeNo authOpenAlex
Open index of scholarly works, authors and institutions, with a generous free API.
FreeNo authCrossref API
Metadata and DOIs for scholarly publications, handy for citation lookups.
FreeNo authSemantic Scholar API (search scholarly articles)
Build projects that accelerate scientific progress with the Semantic Scholar Academic Graph API
See siteSee docsCrossref REST API
DOI metadata for scholarly works.
FreeNo authPubMed E-utilities
NCBI APIs for PubMed and other biomedical databases.
FreeAPI keyEurope PMC REST API
Life-science literature API.
FreeNo authCORE API
Aggregated open access research papers.
FreeAPI keyUnpaywall
Find open-access versions of papers by DOI.
FreeNo authDOAJ API
Directory of open access journals.
FreeNo authDBLP
Computer science bibliography with search API.
FreeNo authGoogle Scholar via SerpApi
Scholar results through a structured API.
Free tierAPI keyORCID API
Researcher identifiers and records.
FreeOAuthScopus API
Elsevier abstract and citation database API.
Free tierAPI keyDimensions API
Research information and analytics.
PaidAPI keyLens.org API
Scholarly and patent search API.
Free tierAPI keybioRxiv API
Preprint metadata API.
FreeNo authOpenCitations
Open citation data.
FreeNo authINSPIRE HEP
High-energy physics literature API.
FreeNo authNASA ADS API
Astrophysics Data System API.
FreeAPI keyHugging Face Papers
Daily ML papers and links to models and datasets.
FreeNo authZenodo
Open repository for research outputs with REST API.
FreeAPI keyFigshare API
Research data repository API.
FreeAPI keyOSF API
Open Science Framework API.
FreeAPI keyWikidata Query Service
SPARQL access to Wikidata.
FreeNo auth