Check if a number is even
isEven API
1{2 "iseven": true,3 "ad": "Buy our premium API for odd numbers!",4 "number": 425}1"color:#c084fc">curl -X "color:#fbbf24">GET "https://isevenapi.xyz/"arcsecond.io
Multiple astronomy data sources
arXiv
Curated research-sharing platform: physics, mathematics, quantitative finance, and economics
Bootprint
Random facts and images of space
CORE
Access the world's Open Access research papers
GBIF
Global Biodiversity Information Facility
iDigBio
Access millions of museum specimens from organizations around the world