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API · /openalex-api

OpenAlex Scholarly API

healthy 4,817 Subscribers

Open scholarly analytics as an API, powered by OpenAlex — the open index of the world\x27s research covering over 250 million works and 90 million authors. Look up researcher profiles with their total works, citation counts, h-index, i10-index and current affiliation, fetch any author by OpenAlex id or ORCID, rank institutions (universities and labs) by research output and citations, search hundreds of millions of scholarly works complete with citation counts, open-access status, venue and author lists (sortable by citations or date), and explore the full topic taxonomy of science by domain, field and subfield. Perfect for research-intelligence and bibliometrics tools, university and grant dashboards, literature-discovery apps, science maps and citation analysis. All data is CC0 and live. No accounts, no upstream key. For DOI metadata use the Crossref API and for preprints the arXiv API.

#openalex #scholarly #research #bibliometrics #citations #academia
api.oanor.com/openalex-api
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Machine-readable spec so AI agents can integrate this API.

/api/openalex-api/openapi.json
/api/openalex-api/llms.txt

Discovery: GET /api/index.json lists every API.

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
786 ms
Server probes · 24h
Subscribers
4,817
active
Total calls
24
last 7 days
status Full status page → · 40 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 3,600 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 3,600 calls/month
  • 2 req/sec
  • Authors, institutions, works & topics
  • No credit card
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Starter

€5.50 /month

  • 46,000 calls / month
  • 5 requests / second
  • Hard cap (429 above quota, no overage)
  • 46k calls/month
  • 5 req/sec
  • Citation metrics & h-index
  • Email support
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Pro

€15.60 /month

  • 224,000 calls / month
  • 15 requests / second
  • Hard cap (429 above quota, no overage)
  • 224k calls/month
  • 15 req/sec
  • Bibliometrics & dashboards
  • Priority support
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Mega

€42.40 /month

  • 1,110,000 calls / month
  • 40 requests / second
  • Hard cap (429 above quota, no overage)
  • 1.11M calls/month
  • 40 req/sec
  • Research-intelligence platforms
  • Dedicated SLA
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Related APIs

Other APIs with overlapping tags.

Research Funding API

Discover the funding and projects behind research — as an API over OpenAIRE, the open research graph that links scholarly outputs to the grants and funders that paid for them. Search funded research projects (grants) by keyword and filter by funder — the European Commission, NIH, NSF, UKRI, DFG, Wellcome and many more — and get each project's title, grant code, acronym, funder, start and end dates, funded amount and summary. Search publications too, with their title, authors, year, DOI, type, publisher, open-access status and whether they were publicly funded. It is the place to find research grants and the money behind science — ideal for research-funding discovery, science-policy analysis, grant intelligence, reporting and open-science tooling. A research-funding / projects resource — distinct from DOI registries (Crossref, DataCite) and scholarly-metadata indexes (OpenAlex). Open data from OpenAIRE (CC BY).

api.oanor.com/openaire-api

Research Organizations API

Every research organization in the world as an API — powered by ROR, the Research Organization Registry. ROR assigns a persistent open identifier (a ROR ID) to universities, government labs, companies, nonprofits, hospitals, archives and research facilities, with rich, curated metadata and crosswalks to GRID, ISNI, Wikidata and the Crossref Funder Registry. Search the registry by name (and filter by country or organization type); resolve any ROR ID to its full record — names, acronyms and aliases, types, location (city, country, coordinates), website, domains, external identifiers and relationships to parent and child organizations; and match a messy free-text affiliation string ("Dept. of Physics, Heidelberg University, Germany") to the most likely organizations with a confidence score — perfect for cleaning and disambiguating author-affiliation data. It is a research-organization identifier registry, distinct from a plain university directory, and a natural companion to ORCID (for people) in any scholarly-metadata stack. Open data from ROR (CC0).

api.oanor.com/ror-api

OpenCitations API

Scholarly citations as open data — powered by OpenCitations (COCI), the open citation index. Unlike a metadata lookup, OpenCitations treats every citation as a first-class object: given a DOI you can list the papers that cite it (incoming citations) and the papers it references (outgoing), each annotated with its OpenCitations Identifier (OCI), the date the citation was created, the timespan between the two works, and whether it is a journal- or author-self-citation. Plus quick citation and reference counts for any DOI. It is built for citation-network and bibliometric work — research-impact analysis, self-citation detection, citation-timespan studies and science mapping — and is distinct from scholarly-metadata services (Crossref, OpenAlex). From a single paper to a whole reference graph, ideal for bibliometrics, research-analytics and reference-management tools. Open data from OpenCitations (CC0).

api.oanor.com/opencitations-api

DOAJ API

The Directory of Open Access Journals as an API, powered by DOAJ — the authoritative, community-curated index of vetted open-access scholarship covering more than 20,000 quality-controlled journals and 10 million+ articles across every discipline. Search open-access journals with full Elasticsearch query syntax, getting each journal's title, ISSNs, publisher and country, subjects, languages, whether article-processing charges (APC) apply, license and the year it became open access; read a journal's complete record including its subjects with classification scheme, keywords, licences, APC prices, fee-waiver policy, peer-review process, plagiarism detection, long-term preservation and self-archiving (deposit) policies and homepage; search open-access articles returning title, authors, journal, year, DOI, keywords and a free full-text link; and read an article's full metadata with its abstract, authors and affiliations, journal and ISSNs, pages, subjects and direct links to the freely readable full text. Ideal for open-science tooling, library and repository systems, research discovery, APC and policy analysis, and any application that needs legally free, peer-reviewed scholarship. Identify a journal by its ISSN and an article by its DOI or DOAJ id from search results. Data from DOAJ.

api.oanor.com/doaj-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for OpenAlex Scholarly API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call OpenAlex Scholarly API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for OpenAlex Scholarly API?
Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.
How much does OpenAlex Scholarly API cost?
OpenAlex Scholarly API has a free tier with 100 calls / month. Paid plans start at €5.50 / month with higher quotas and faster rate limits.
Can I cancel my subscription anytime?
Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.
Is OpenAlex Scholarly API GDPR-compliant?
All requests to OpenAlex Scholarly API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.

Pick an endpoint from the list on the left to see its details and try it.

Code snippets

Sign up to get an API key, then call any path under your slug.

curl https://api.oanor.com/openalex-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/openalex-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/openalex-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);
import requests
r = requests.get(
    "https://api.oanor.com/openalex-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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