Fee estimates, address and transaction status, network health, mining pools, supply and price from mempool.space.
payments ON MAINNET (real money) · 8 live endpoints
| Endpoint | Price | What it answers |
|---|---|---|
GET /btc-address-check | $0.03 | Validate a Bitcoin mainnet address and report its type, confirmed and pending balance, transaction count and USD value. |
GET /btc-address-validate | $0.02 | Validate a Bitcoin address checksum offline: base58check or bech32/bech32m, with type and network (mainnet or test). |
GET /btc-fee-estimate | $0.03 | Bitcoin fee rates for next-block to economy confirmation, mempool congestion level and the cost of a typical transaction. |
GET /btc-mining-pools | $0.02 | Mining pool share of recent Bitcoin blocks with concentration (top-3 share, HHI) and the 51 percent check. |
GET /btc-network-health | $0.03 | Bitcoin network health: tip height, block pace vs 10 minutes, difficulty retarget forecast, hashrate trend and Lightning size. |
GET /btc-price | $0.02 | Bitcoin price in USD, EUR, GBP, CAD, CHF, AUD and JPY, with optional conversion of an amount of BTC, sats or fiat. |
GET /btc-supply | $0.02 | Bitcoin issued supply, block subsidy, percent of 21 million mined and the next halving, computed exactly from protocol rules. |
GET /btc-tx-status | $0.03 | Status of a Bitcoin transaction: unconfirmed or confirmed, confirmation depth, fee and fee rate, size and replaceability. |
GET /catalog returns this list as JSON. Activity hub · uptime.
Bitcoin network facts come from the public mempool.space API and local computation, provided as is. Fee estimates are predictions that can be wrong within minutes, balances reflect the indexer's view, and prices are indicative. This is not financial advice and not a custody or transaction service. Every paid response carries a disclaimer field.