Numbers
Number of the day, random number, number facts and anything else you want to do with numbers
- Authentication
- API Key
- HTTPS
- Yes
- CORS
- No
- Category
- Science & Math
- Documentation / URL
- https://math.tools/api/numbers/
Overview
Numbers (math.tools) provides number data — key-based (the API responds even without a valid key, verified).
Quick Start
Number of the day (replace YOUR_KEY):
curl "https://api.math.tools/numbers/nod?key=YOUR_KEY"{ "success": { "total": 1 }, "copyright": { "copyright": "2019-21 https://math.tools" }, "contents": { "nod": { "category": { "name": "number" } } } }Authentication
- Register at math.tools → API key.
- Send it as the
keyquery parameter.
Rate Limits & Notes
- Free tier with limits (check the docs); paid plans scale.
- Number facts.
FAQ
Is Numbers free? Free tier with limits; more is paid.
Does it work without a key? It responds with data even with an invalid key (verified) — but use a real key for reliable access.
What’s the auth style?
key query parameter.
More in Science & Math
| API | Auth | HTTPS | CORS | |
|---|---|---|---|---|
| arcsecond.io Multiple astronomy data sources | No auth | Yes | Unknown | ↗ |
| arXiv Curated research-sharing platform: physics, mathematics, quantitative finance, and economics | No auth | Yes | Unknown | ↗ |
| CodeCogs Render LaTeX equations in PNG, GIF, SVG, EMF, PDF, JSON, or download formats with styling options | No auth | Yes | Unknown | ↗ |
| CORE Access the world's Open Access research papers | API Key | Yes | Unknown | ↗ |
| CycleCalcs Interpreted astronomy: sun and moon times, moon phases, planets, eclipses, seasons | No auth | Yes | Yes | ↗ |