Free public APIs
1216 free APIs for your next project, with features and use-case ideas. Page 37 of 51.
Codeforces API
Competition for the Best Programmers
Judge0 API
Your Code, Judged
Kontests API
Take online contest engagement to the next level with the Kontests API
Arcsecond API
Precise, Astrophysics Preparation made easier
Core API
Connect to research
iDigBio Search API
Innovative Data Access through Search
Inspire REST API
Integrate knowledge with the Inspire REST API
isEven API
One API to Rule Them All
ISRO API
The official API for the International Space Research Organization (ISRO)
Integrated Taxonomic Information System (ITIS)
A Digital Taxonomic Reference Resource
Launch Library API
Your Launch Data Launchpad
MPDS
Empowering Scientists to Manage Data Smartly
Asterank MPC API
Exploring our solar system and beyond with Asterank
AdsAPI
Discover the power of data.
Newton
Solve all your modeling problems with Newton!
NoctuaSky API (NAPI)
Unlock your digital potential with the NoctuaSky API
Math Tools Numbers API
Easy math & fast numbers.
numbersAPI
Unlock the Power of Numbers
Open-Notify API
Real-time satellite tracking made easy
OSF API
Make research seamless
RemoteCalc
Powerful remote calculations made easy
Open Science Framework API
Share, discover, and re-use open data and research
SpaceX API
Accessing Space Exploration Data
Sunrise-Sunset API
Know when the sun rises and sets, wherever you are.