Open Notify
HTTP No CORS Free
ISS astronauts, current location, etc
API Endpoint
http://open-notify.org/Open-Notify-API/More Science & Math APIs
Multiple astronomy data sources
HTTPS CORS ? Free
Curated research-sharing platform: physics, mathematics, quantitative finance, and economics
HTTPS CORS ? Free
Access the world's Open Access research papers
HTTPS CORS ? apiKey