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Bitcoin Halving

Halving era, block reward, and schedule arithmetic for any Bitcoin block height

Open documentation ↗
No keyHTTPSCORSCryptocurrency

Verified 4 days ago: 100% uptime

API key

Not required

HTTPS

Supported

Browser calls

Yes, CORS enabled

Status

Live · 100/100

What our checks found

Health score
100/100
Reliability
100%
Average latency
436ms

Last checked 2026-09-18. Measured independently, not self-reported by the provider.

How to call it

A starting template for Bitcoin Halving. Replace ENDPOINT with the path from the official documentation, which we link above rather than guess at.

# No authentication required.
curl -s "https://why21million.com/ENDPOINT" \
  -H "Accept: application/json"

Where this listing comes from

Aggregated from 2 public sources (public-api-lists, public-apis), then normalised and checked by us. If something here is wrong, tell us and we will correct it.

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Bitcoin Halving — common questions

Answered from what our own scheduled checks found, not from the provider's marketing.

Is Bitcoin Halving free to use?

Bitcoin Halving 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 Bitcoin Halving need an API key?

No. We called Bitcoin Halving 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 Bitcoin Halving from browser JavaScript?

Yes. Bitcoin Halving returned CORS headers when we checked it, so a browser will let your page read the response. You can fetch it directly from client-side JavaScript with no proxy and no backend.

Is Bitcoin Halving still working?

Yes, as of 2026-09-18. Our automated check reached Bitcoin Halving and recorded a 100% reliability score with a median response time of 436 ms. We re-check on a schedule, and this page updates with the result.

Is Bitcoin Halving available over HTTPS?

Yes. Bitcoin Halving serves over HTTPS, so you can call it from a secure page without triggering a mixed-content block.