The Bitcoin Esplora API offers fast, read-optimized access to Bitcoin blockchain data—covering blocks, transactions, addresses, mempool state, UTXOs, fees, and more. Based on the widely adopted Esplora interface from Blockstream, it is designed for developers building explorers, wallets, payment processors, or analytics platforms who need structured blockchain data without managing their own indexing infrastructure. With this API, you can retrieve address information, trace transaction statuses, monitor mempool activity, and fetch granular data like outspend status, block headers, and raw binary or hex representations of transactions and blocks.

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Key Features

  • Address-Level Insights: Retrieve balances, chain statistics, mempool stats, UTXOs, and complete transaction history (confirmed and unconfirmed) for any Bitcoin address.
  • Block Data Access: Get full block metadata, transaction IDs, raw blocks, block headers, status, and block ranges by height or hash.
  • Transaction Lookups: Query full transaction details, hex serialization, raw binary data, merkle proofs, outspend data, and RBF timelines.
  • Mempool Monitoring: Access mempool statistics, transaction IDs, recent transactions, and fee distribution histograms.
  • Broadcast Transactions: Push signed transactions to the Bitcoin network in raw hex format for propagation.
  • Multi-Network Support: Available on both Bitcoin Mainnet and Testnet environments.

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Key Benefits for Developers

The Esplora API allows developers to access production-grade Bitcoin blockchain data with low latency and without the operational overhead of running a full archival node or Esplora indexer. Its familiar, REST-friendly endpoints return well-structured JSON, making it straightforward to plug into existing applications, trading systems, or analytics pipelines. Whether you need real-time mempool monitoring, forensic transaction analysis, or historical block data, this API delivers a complete toolkit for Bitcoin-powered development across both test and production environments. Refer to Maestro’s Mempool.space Migration Guide for a comprehensive resource to assist in replacing your existing Esplora provider with Maestro for the same functionality and supported interface at a fraction of the cost.