CORE API: Search 260M+ Scientific Papers Across All Repositories (Free)

Most academic APIs cover a single source. But what if you need to search across ALL of them at once? CORE (core.ac.uk) aggregates 260M+ papers from 10,000+ repositories worldwide. It is the largest collection of open-access research papers. And it has a free API. What Is CORE? CORE stands for COnnecting REpositories. It harvests papers from: University repositories (Harvard, MIT, Oxford) Preprint servers (arXiv, bioRxiv, medRxiv) Open-access journals (PLOS, MDPI, Frontiers) National repositories (PubMed Central, HAL) Result: 260M+ metadata records and 36M+ full-text papers searchable through one API. Getting Started Get a free API key from core.ac.uk/services/api. import requests API_KEY = " your_free_api_key " BASE = " https://api.core.ac.uk/v3 " headers = { " Authorization " : f " Bearer { API_KEY } " } response = requests . get ( f " { BASE } /search/works " , headers = headers , params = { " q " : " web scraping ethics " , " limit " : 5 }) for paper in response . json ()[ " results