#academic

Calculate a weighted grade-point average (GPA). The calc endpoint takes a list of courses — each with a grade and the credit hours it is worth — and returns the credit-weighted GPA, the totals, and a per-course breakdown of quality points so you can see exactly how the average was formed. Grades may be US letter grades (A, A-, B+, … F) on the standard 4.0 scale, or 4.3 with the us_plus scale that gives A+ extra weight; percentages from 0 to 100 mapped to letters and points with the usual cutoffs; raw grade points given directly as numbers; or your own custom letter-to-point mapping for any institution's scheme. Courses can be passed as a JSON array or a compact string like "A:3,B+:4,C:2", and credits default to 1 for an unweighted average. The scales endpoint lists the built-in grade scales and their point values. Everything is computed locally and deterministically, so it is instant and private — no student data is stored. Ideal for student planners and dashboards, university and school portals, LMS and ed-tech apps, scholarship and admissions tools, and academic what-if calculators. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This computes GPA; for general statistics use a statistics API.

api.oanor.com/gpa-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

ORCID as an API — the global researcher identity registry, powered by the ORCID Public API. An ORCID iD (for example 0000-0002-1825-0097) uniquely and persistently identifies a researcher across journals, funders, universities and the entire scholarly record. Search more than 15 million researchers by name, institution, keyword or external identifier using rich Solr field syntax, getting each match's ORCID iD, name, other names and affiliated institutions; read a researcher's public profile including their published and credit names, biography, research keywords, country, personal and lab websites and external identifiers such as Scopus Author ID or ResearcherID; list the works they have claimed on their record with each work's title, type, publication year, journal and DOI; and trace their employment and education affiliations with the organization, role, department and dates. Ideal for research-information systems, author disambiguation, institutional reporting, scholarly tooling and academic search. ORCID iDs come from search results or are supplied directly by the researcher. Data is the public portion of ORCID records (CC0). For the scholarly works and citation graph see the OpenAlex API; for DOIs and journal metadata the Crossref API.

api.oanor.com/orcid-api

Search the entire arXiv scholarly-preprint corpus as an API — millions of papers across physics, mathematics, computer science, quantitative biology and finance, statistics, electrical engineering and economics. Query by free text, title, author and/or subject category (e.g. q=transformer&category=cs.AI), with paging and sort by relevance, submission or last-update date, or pull full metadata for any paper by its arXiv id (e.g. 1706.03762 → "Attention Is All You Need"). Every result carries the title, full author list, abstract, primary and cross-list categories, DOI, journal reference, comments and a direct PDF link. Ideal for literature-review and research tools, citation managers, ML/AI paper trackers, academic search and discovery, and science newsletters.

api.oanor.com/arxiv-api

Search a database of 10,000+ universities and colleges worldwide (Hipolabs open dataset). Find institutions by name and country, look one up by its email domain, and browse counts per country. Each record includes the official name, country, region, email domains and websites — ideal for sign-up forms, student-email verification, education directories and enrichment.

api.oanor.com/universities-api

Search scholarly literature and look up rich publication metadata from Crossref, the DOI registry behind millions of journal articles, books, chapters, conference papers and datasets. Full-text search across 150+ million works with relevance or citation sorting and optional filters, retrieve any work by its DOI (plain, doi: or URL form accepted), and search journals and publishers. Every work comes back as a clean record with title, authors and ORCIDs, journal/container, publisher, publication date, volume/issue/page, ISSN/ISBN, abstract, subjects, license and citation count. Authoritative open scholarly metadata delivered through a fast, reliable API — ideal for reference managers, repositories, research analytics, discovery tools and academic apps.

api.oanor.com/crossref-api