arcsecond.io
Science & Math
Multiple astronomy data sources
No keyCORSHTTPS
Numbers
The Numbers API provides interesting facts about numbers covering trivia, math, dates, and years. Users can easily access these facts by specifying the number and type in a simple URL structure.
Checked 4 days ago: not responding
API key
Not required
HTTPS
Not supported
Browser calls
No, needs a proxy
Status
Failing · 13/100
What our checks found
- Health score
- 13/100
- Reliability
- 0%
- Average latency
- 722ms
Last checked 2026-09-18. Measured independently, not self-reported by the provider.
How to call it
A starting template for Numbers. Replace ENDPOINT with the path from the official documentation, which we link above rather than guess at.
# No authentication required.
curl -s "http://numbersapi.com/ENDPOINT" \
-H "Accept: application/json"This API does not send CORS headers, so a browser will block a direct call from your front end. Call it from your server, or put a small proxy in front of it.
This API is served over plain HTTP. Browsers block HTTP requests made from an HTTPS page, so you will need a server-side call.
Where this listing comes from
Aggregated from 2 public sources (freepublicapis, public-apis), then normalised and checked by us. If something here is wrong, tell us and we will correct it.
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Numbers — common questions
Answered from what our own scheduled checks found, not from the provider's marketing.
Is Numbers free to use?
Numbers is listed in our free catalogue and required no credential when we called it. It needs no authentication at all, so you can send a request without signing up. Free tiers can still carry rate limits or non-commercial terms, so check the provider's own terms before shipping.
Does Numbers need an API key?
No. We called Numbers on 2026-09-18 with no key, no token and no Authorization header, and it responded. That is what puts it in our no-key collection.
Can I call Numbers from browser JavaScript?
Not directly. Numbers did not return CORS headers when we checked, so the browser will block your page from reading the response even though the request itself succeeds. Call it from a server, or put a small proxy in front of it.
Is Numbers still working?
Not at our last check on 2026-09-18. Numbers did not respond successfully, which is why it is marked as down here. This may be temporary; we re-check on a schedule and the badge above reflects the most recent run.
Is Numbers available over HTTPS?
No. Numbers was only reachable over plain HTTP when we checked. Browsers block HTTP requests made from an HTTPS page, so this will fail in production unless you call it from a server instead.