The BitcoinDatabase blog
On-chain data, explained
Practical writing on querying the Bitcoin blockchain: how to pull balances, UTXOs and transaction history by REST API and SQL, work with on-chain metrics and mempool data, trace fund flows and entity labels, and use AML risk signals as compliance tooling. Informational on-chain data only.
Best Bitcoin API for Developers in 2026: How to Choose
The best Bitcoin API depends on the job: raw on-chain data, prices, node access or compliance. We compare the categories, honestly, so you can pick the right one without running your own node.
How to Get Bitcoin Transaction Notifications Without Running a Node
Get real-time Bitcoin transaction notifications with a webhook API: subscribe an address, set a confirmation threshold, and receive a callback the moment it is paid. No node, no polling.
How to Access a Bitcoin Node Without Running One
Access a Bitcoin node without running one: a node API keeps Bitcoin Core synced for you and maps JSON-RPC calls to clean REST endpoints. Skip the disk, the days-long sync and the uptime burden.
How to Query the Bitcoin Blockchain: API vs SQL vs Running a Node
How to query the Bitcoin blockchain three ways: a REST API, plain SQL, and your own node. We compare setup time, indexing, and cost so you can pick the right tool for addresses, transactions and on-chain analytics.
On-Chain Metrics Explained: SOPR, Realized Cap, HODL Waves and What They Mean
On-chain metrics explained from first principles: SOPR, realized cap, HODL waves, active addresses and exchange flows, what each one measures, how it is computed from UTXOs, and how to read it. Informational only, not advice.
Reading a Bitcoin Address: Balance, UTXOs and Transaction Flows from First Principles
Bitcoin address lookup from first principles: how a balance is really the sum of unspent outputs, how to read UTXOs, inputs and outputs, and how to trace transaction flows with a REST API or SQL.
Building a Bitcoin Wallet or Explorer Without Running Your Own Node
Bitcoin API guide: how to build a wallet, explorer or analytics tool without running your own node, using indexed REST and SQL endpoints for balances, transactions, confirmations and mempool data.
Bitcoin AML and Compliance Data: What On-Chain Risk Signals Can and Can't Tell You
Bitcoin AML compliance data explained: how entity labels, exposure paths and risk signals support your own review process, what on-chain data can and cannot tell you, and where human judgment stays essential. Informational, not legal advice.
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Reading is good. Live on-chain data is better.
Query the fully indexed Bitcoin blockchain by REST API, SQL and dashboards. Pull balances, UTXOs, transactions, on-chain metrics and fund flows, with new blocks available within seconds and no node to run.
REST + SQL + dashboards · indexed since 2009 · new blocks within seconds