arcsecond.io
Science & Math
Multiple astronomy data sources
No keyCORSHTTPS
Free Science & Math APIs
Research datasets, astronomy, physics, chemistry and computation.
53 listed · 41 need no key · 22 work in the browser
CodeCogs
Science & Math
Render LaTeX equations in PNG, GIF, SVG, EMF, PDF, JSON, or download formats with styling options
No keyCORSHTTPS
Europe PMC
Science & Math
Life-science literature search with abstracts, citations and full-text links
No keyCORSHTTPS
ISRO
Science & Math
ISRO Space Crafts Information
No keyCORSHTTPS
Minor Planet Center
Science & Math
Asterank.com Information
No keyCORS
MyGene.info
Science & Math
Gene annotation queries and ID lookup
No keyCORSHTTPS
NASA
Science & Math
The NASA Open APIs provide developers with easy access to a wide range of NASA data, including imagery and scientific information. These APIs are designed to enhance the usability of NASA's dataset for developers, educators, and researchers.
No keyCORSHTTPS
Newton
Science & Math
Symbolic and Arithmetic Math Calculator
No keyCORSHTTPS
Newton
Science & Math
Symbolic and Arithmetic Math Calculator
No keyCORSHTTPS
Open Notify
Science & Math
ISS astronauts, current location, etc
No keyCORS
OpenAlex
Science & Math
Open catalog of scholarly works, authors, institutions, sources, and concepts
No keyCORSHTTPS
SHARE
Science & Math
A free, open, dataset about research and scholarly activities
No keyCORSHTTPS
TLE
Science & Math
Satellite information
No keyCORSHTTPS
Unusual Units Converter
Science & Math
Unit converter for standard and uncommon units
No keyCORSHTTPS
USGS Earthquake Hazards Program
Science & Math
This API allows users to perform custom searches for earthquake information based on various parameters, such as location, time, and magnitude. It adheres to the FDSN Event Web Service Specifications, providing a structured way to access earthquake data.
No keyCORSHTTPS
USGS Water Services
Science & Math
Water quality and level info for rivers and lakes
No keyCORSHTTPS
arXiv
Science & Math
Curated research-sharing platform: physics, mathematics, quantitative finance, and economics
No keyHTTPS
CycleCalcs
Science & Math
Interpreted astronomy: sun and moon times, moon phases, planets, eclipses, seasons
No keyHTTPS
GBIF
Science & Math
Global Biodiversity Information Facility
No keyHTTPS
GBIF
Science & Math
Global Biodiversity Information Facility
No keyHTTPS
iDigBio
Science & Math
Access millions of museum specimens from organizations around the world
No keyHTTPS
inspirehep.net
Science & Math
High Energy Physics info. system
No keyHTTPS
isEven (humor)
Science & Math
The Is Even API checks whether a given integer is even or odd. It provides a simple endpoint where you can submit a number and receive a response indicating its parity.
No keyHTTPS
ITIS
Science & Math
Integrated Taxonomic Information System
No keyHTTPS
All 53 Science & Math APIs
- arcsecond.io
- CodeCogs
- Europe PMC
- ISRO
- Minor Planet Center
- MyGene.info
- NASA
- Newton
- Newton
- Open Notify
- OpenAlex
- SHARE
- TLE
- Unusual Units Converter
- USGS Earthquake Hazards Program
- USGS Water Services
- arXiv
- CycleCalcs
- GBIF
- GBIF
- iDigBio
- inspirehep.net
- isEven (humor)
- ITIS
- Launch Library
- Launch Library 2
- Noctua
- Numbers
- Ocean Facts
- Open Science Framework
- Purple Air
- RCSB PDB
- Remote Calc
- Semantic Scholar
- SpaceX
- SpaceX
- Sunrise and Sunset
- Tallytopia
- Times Adder
- World Bank
- xMath
- CelesTrak GP Data
- Crossref REST API
- NASA ADS
- Numbers
- Satellite TLE Data
- VedIntel™ AstroAPI
- Alan Perlis Quotes
- CORE
- Materials Platform for Data Science
- Math Function Parser
- Newton API
- OrbitalWiki
Free Science & Math APIs — common questions
Counts and timings below come from our own scheduled checks of this category.
How many free science & math APIs are there?
We track 53 in this category, of which 44 responded at our last check. 41 of them need no API key.
Which science & math APIs work without an API key?
41 of the 53 entries here need no credential. Filter this page by "no key" to see them, or browse the no-key collection for every keyless API across all categories.
Can I use these science & math APIs in a browser app?
16 entries in this category need no key and return CORS headers, which is the combination that lets you call them straight from client-side JavaScript. The rest need a server or a proxy in between.
Which is the fastest free science & math API?
Of the keyless options that responded at our last check, Europe PMC was quickest at a median 211 ms. Speed is only one factor — coverage and licensing usually matter more — but it is measured here rather than claimed.
How do you know these APIs still work?
We call every listing on a schedule and record the status code, response time and whether CORS headers came back. Those results drive the badges on this page. Across the whole catalogue, 487 of 2,712 entries were not responding at the last full run, which is the sort of thing an unchecked list never tells you.