Bitcoin Halving
FreeLiveLast verified 24 Sept 2026
Computes Bitcoin's halving era, block subsidy and blocks-to-next-halving for any block height.
Example request
curl -s 'https://why21million.com/api/halving/850000'
Free tier, in plain English
No API key, account or enforced rate limit; the docs ask callers to be reasonable and cache the 24-hour-cacheable responses.
Alternatives in Crypto
0xArchiveLive and historical Hyperliquid and Lighter order books, trades, funding and liquidation data.Freemium1inchDEX aggregator for token swap quotes, execution, order books, and on-chain prices across many chains.FreemiumAlpha (Mossland)RAG Q&A and canonical entity data over Korean crypto news and on-chain activity.FreeBinanceReal-time crypto prices, order books and trading for Binance's spot exchange, via REST and WebSocket.FreeBitfinexReal-time crypto tickers, order books, trades and candles for pairs traded on Bitfinex.Free