Science & Math APIs let you add science & math capabilities without building from scratch. Every entry below is profiled with trust signals — pricing model, authentication requirements, CORS support, rate limits, and live uptime checks — so you can compare options and pick production-safe choices instead of guessing from a link list.
| API | Pricing | Auth | CORS | Health | |
|---|---|---|---|---|---|
| Bootprint Random facts and images of space | Free | No | Yes | Profile | |
| CORE Access the world's Open Access research papers | Free | API Key | No | Profile | |
| CodeCogs API Render LaTeX equations in PNG, GIF, SVG, EMF, PDF, JSON, or download formats with styling options | Unknown | Unknown | Unknown | Profile | |
| Crossref API Crossref API: metadata for 150M+ scholarly works including DOIs, citation counts, funding info, licenses, and journal metrics. | Free | Unknown | Yes | Profile | |
| CycleCalcs API Interpreted astronomy: sun and moon times, moon phases, planets, eclipses, seasons | Freemium | API Key | Yes | Profile | |
| Europe PMC REST API Search life-sciences publications, citations, references, full-text links, grants, and text-mined annotations. | Free | No | Yes | Profile | |
| GBIF Global Biodiversity Information Facility | Free | No | No | Profile | |
| ISRO ISRO Space Crafts Information | Free | No | Yes | Profile | |
| ITIS Integrated Taxonomic Information System | Free | No | No | Profile | |
| Launch Library 2 Spaceflight launches and events database | Freemium | No | No | Profile | |
| Materials Platform for Data Science Curated experimental data for materials science | Freemium | API Key | No | Profile | |
| Minor Planet Center API Asterank.com Information | Unknown | Unknown | Unknown | Profile | |
| NASA NASA data, including imagery | Free | No | Yes | Profile | |
| NASA ADS NASA Astrophysics Data System | Freemium | OAuth | Yes | Profile | |
| NASA APOD API NASA APOD API: astronomy picture of the day, space images, and metadata with NASA's curated space imagery. | Free | API Key | Yes | Profile | |
| NASA Exoplanet Archive TAP API Query confirmed planets, host stars, Kepler and TESS candidates, and other exoplanet datasets through Table Access Protocol. | Free | No | Yes | Profile | |
| NASA JPL Horizons API NASA JPL Horizons: solar system ephemeris computation for planets, moons, asteroids, and comets. | Free | API Key | No | Profile | |
| NCBI Entrez E-utilities Search and retrieve biomedical literature, genes, proteins, nucleotide sequences, structures, taxonomy, and other Entrez databases. | Free | No | Yes | Profile | |
| NOAA Tides & Currents API NOAA Tides & Currents API: real-time and historical tide predictions, water levels, and current data. | Free | Unknown | Yes | Profile | |
| Newton Symbolic and Arithmetic Math Calculator | Free | No | Yes | Profile | |
| Noctua REST API used to access NoctuaSky features | Free | No | No | Profile | |
| Numbers Number of the day, random number, number facts and anything else you want to do with numbers | Freemium | API Key | No | Profile | |
| Numbers Facts about numbers | Free | No | No | Profile | |
| Ocean Facts API Facts pertaining to the physical science of Oceanography | Unknown | Unknown | Unknown | Profile | |
| Open Notify ISS astronauts, current location, etc | Free | No | Yes | Profile | |
| Open Notify API Open Notify API: International Space Station location, astronauts in space, and ISS pass times. | Free | Unknown | Yes | Profile | |
| Open Science Framework Repository and archive for study designs, research materials, data, manuscripts, etc | Free | OAuth | No | Profile | |
| OpenAlex API OpenAlex API: scholarly research data, 250M+ works, authors, institutions, venues, concepts, and citations. | Free | Unknown | Yes | Profile | |
| Purple Air Real Time Air Quality Monitoring | Free | No | No | Profile | |
| SHARE A free, open, dataset about research and scholarly activities | Free | No | Yes | Profile | |
| Satellite Passes Find satellite passes | Free | No | Yes | Profile | |
| Semantic Scholar API Semantic Scholar API: AI-powered academic search, citation graphs, paper recommendations, author profiles, and research metrics from 200M+ papers. | Free | API Key | Yes | Profile | |
| SpaceX Company, vehicle, launchpad and launch data | Free | No | No | Profile | |
| Sunrise and Sunset Sunset and sunrise times for a given latitude and longitude | Free | No | No | Profile | |
| TLE Satellite information | Free | No | Unknown | Profile | |
| Times Adder With this API you can add each of the times introduced in the array sent | Free | No | No | Profile | |
| USGS Earthquake Hazards Program Earthquakes data real-time | Free | No | Yes | Profile | |
| USGS Water Services Water quality and level info for rivers and lakes | Free | No | Yes | Profile | |
| Where the ISS at? API Where the ISS at?: real-time ISS location tracking with altitude, velocity, and crew information. | Free | Unknown | Yes | Profile | |
| World Bank World Data | Free | No | No | Profile | |
| arXiv Curated research-sharing platform: physics, mathematics, quantitative finance, and economics | Free | No | No | Profile | |
| arXiv API 2 Curated research-sharing platform: physics, mathematics, quantitative finance, and economics | Free | Unknown | Unknown | Profile | |
| arcsecond.io Multiple astronomy data sources | Freemium | API Key | Yes | Profile | |
| iDigBio Access millions of museum specimens from organizations around the world | Free | No | No | Profile | |
| inspirehep.net High Energy Physics info. system | Free | No | No | Profile | |
| isEven (humor) Check if a number is even | Free | No | No | Profile |
Start with pricing and auth: free tiers and no-auth APIs are fastest to prototype with. Then check CORS if your app calls the API from the browser, and health before you commit — a great API that's been down for a week will block your launch. Each profile below shows all of these signals plus rate limits where documented.