arcsecond.io
Multiple astronomy data sources
Science & Math APIs
34 free APIs with no signup and no API key. Data from public-apis (MIT).
arXiv
Curated research-sharing platform: physics, mathematics, quantitative finance, and economics
CodeCogs
Render LaTeX equations in PNG, GIF, SVG, EMF, PDF, JSON, or download formats with styling options
CycleCalcs
Interpreted astronomy: sun and moon times, moon phases, planets, eclipses, seasons
Europe PMC
Life-science literature search with abstracts, citations and full-text links
GBIF
Global Biodiversity Information Facility
iDigBio
Access millions of museum specimens from organizations around the world
inspirehep.net
High Energy Physics info. system
isEven (humor)
Check if a number is even
ISRO
ISRO Space Crafts Information
ITIS
Integrated Taxonomic Information System
Launch Library 2
Spaceflight launches and events database
Minor Planet Center
Asterank.com Information
NASA
NASA data, including imagery
Newton
Symbolic and Arithmetic Math Calculator
Noctua
REST API used to access NoctuaSky features
Numbers
Facts about numbers
Ocean Facts
Facts pertaining to the physical science of Oceanography
Open Notify
ISS astronauts, current location, etc
Open Science Framework
Repository and archive for study designs, research materials, data, manuscripts, etc
OpenAlex
Open catalog of scholarly works, authors, institutions, sources, and concepts
Purple Air
Real Time Air Quality Monitoring
Remote Calc
Decodes base64 encoding and parses it to return a solution to the calculation in JSON
SHARE
A free, open, dataset about research and scholarly activities
SpaceX
Company, vehicle, launchpad and launch data
SpaceX
GraphQL, Company, Ships, launchpad and launch data
Sunrise and Sunset
Sunset and sunrise times for a given latitude and longitude
Tallytopia
Calculators for finance, health, math, space and sports with step-by-step results
Times Adder
With this API you can add each of the times introduced in the array sended
TLE
Satellite information
USGS Earthquake Hazards Program
Earthquakes data real-time
USGS Water Services
Water quality and level info for rivers and lakes
World Bank
World Data
xMath
Random mathematical expressions
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