How to Choose the Best Science & Math API in 2026
There are 33 Science & Math APIs in our directory. Of these, 25 require no authentication, making them ideal for quick prototyping. 25 are rated beginner-friendly.
Scores last tested: 2026-08-10
Quick Comparison: Top 10 Science & Math APIs
Ranked by API Score. Measured means we called a real endpoint of that API; Est. means the score is derived from metadata because the endpoint could not be called without credentials. Discontinued APIs are excluded.
| Name | API Score | Auth | HTTPS | CORS | Difficulty |
|---|---|---|---|---|---|
| ISRO | 92 A+ Est. | No Auth | ✓ | ✗ | Beginner |
| NASA | 92 A+ Est. | No Auth | ✓ | ✗ | Beginner |
| Newton | 92 A+ Est. | No Auth | ✓ | ✗ | Beginner |
| Remote Calc | 92 A+ Est. | No Auth | ✓ | ✓ | Beginner |
| Noctua | 87 A Est. | No Auth | ✓ | ? | Beginner |
| World Bank | 85 A Measured | No Auth | ✓ | ✗ | Beginner |
| SpaceX | 84 A Est. | No Auth | ✓ | ✗ | Beginner |
| Times Adder | 84 A Est. | No Auth | ✓ | ✗ | Beginner |
| USGS Earthquake Hazards Program | 84 A Measured | No Auth | ✓ | ✗ | Beginner |
| arcsecond.io | 82 A Est. | No Auth | ✓ | ? | Beginner |
Free Science & Math APIs (No Auth)
These APIs require no API key or signup. Start using them immediately.
arcsecond.io
⭐ Beginner's Pickarcsecond.io is a free astronomy API that aggregates data from multiple space databases, including stars, planets, exoplanets, and observing sites.
GBIF
⭐ Beginner's PickGBIF (Global Biodiversity Information Facility) is a free, open API providing access to hundreds of millions of species occurrence records from around the world.
iDigBio
iDigBio is a free API that gives you access to millions of digitized natural history museum specimens from institutions across the United States and beyond.
inspirehep.net
INSPIRE-HEP is a free REST API for the High Energy Physics literature database, covering papers, authors, institutions, conferences, and experiments in particle physics.
isEven (humor)
⭐ Beginner's PickisEven is a humorous free API that tells you whether a number is even or odd.
ISRO
⭐ Beginner's PickISRO is a free, no-auth API that provides detailed information about the Indian Space Research Organisation spacecraft and missions.
Try It in 5 Minutes: GBIF
Quick implementation example using GBIF.
Using curl
curl "https://api.gbif.org/v1/species/match?name=Panthera+leo"
JavaScript
const url = "https://api.gbif.org/v1/species/match?name=Panthera+leo";
const response = await fetch(url);
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data); New to APIs? Read our Getting Started Guide →
Frequently Asked Questions
How many Science & Math APIs are available?
There are 33 Science & Math APIs in our directory as of 2026.
Are there free Science & Math APIs?
Yes, 25 Science & Math APIs require no authentication and are completely free to use.
What is the easiest Science & Math API to use?
GBIF is one of the easiest to get started with. It is rated as beginner-level and requires no authentication.
Do I need an API key for Science & Math APIs?
It depends. 25 APIs need no authentication, 3 require an API key, and 1 use OAuth.