No account, key, or paid plan
BTC21 does not offer API accounts, API keys, subscriptions, service-level agreements, or commercial data access. This is a best-effort community service and availability may change without notice.
BTC21 community infrastructure
Explorer API
The BTC21 Explorer uses a public REST interface for Bitcoin block, transaction, address, mempool, and fee information. It is available for occasional personal, non-commercial use.
Access guidelines
- Personal and non-commercial use only.
- Keep requests modest: the service is rate-limited to 20 requests per second per IP, with a short burst allowance. Excess traffic receives HTTP 429.
- Do not use it for bulk historical extraction, scraping, commercial products, resale, redistribution, or high-volume automated workloads.
- Do not rely on it as a source of truth for time-sensitive, financial, security, or operational decisions. Verify important Bitcoin data independently.
Endpoint base
The API is served under the same trusted BTC21 Explorer origin:
https://explorer.btc21.cc/api/For example, the current indexed chain height is available at:
GET https://explorer.btc21.cc/api/blocks/tip/heightThe interface exists to support the explorer. It is unauthenticated but is not a supported commercial API product.
Terms and privacy
Use is subject to the BTC21 Terms of Service and Privacy Policy. BTC21 operates no wallet or custodial service; never submit private keys, seed phrases, or sensitive personal information to this site or API.