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Trusted by Hundreds of Bitcoin Builders
Powerful crypto Data API
10 billion+
Calls per year
12,000+
Active API keys
220+
Endpoints
6,000 BTC+
In trading and inscription volume
Why Builders Choose UniSat API for Bitcoin Development
Comprehensive, High-Performance, and Cost-Efficient
Infrastructure-grade APIs built specifically for Bitcoin developers
UniSat API delivers truly comprehensive coverage across networks, protocols, and product services:
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Deep support for both Bitcoin and Fractal Bitcoin ecosystems, covering mainnet and testnet, with continuous enhancements around mature protocols such as BRC20, Runes, Alkanes, and BRC2.0
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Programmatic access to the full UniSat product suite, including minting services, decentralized marketplace, Inswap, and more—supporting everything from basic queries to complex transaction construction
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220+ API endpoints covering block data, transaction history, UTXO-related data, and Bitcoin protocol assets such as BRC20 balances, holder addresses, and transaction histories
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Enterprise-grade rate limits of up to 500 calls per second for exchanges and market makers, with support for UTXO queries in <1 sat/vB mode
Proven, Trusted, and Built to Last
Data infrastructure validated by real-world, production-grade use
UniSat API is not built for demos—it has been continuously tested and proven in real business environments:
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Trusted by a large and growing developer base with 12,000+ active API keys
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Adopted by top-tier exchanges, data platforms, and ecosystem projects, supporting production use cases for organizations such as Binance, OKX, Bybit, CoinMarketCap, and CoinGecko
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Powers real arbitrage and aggregated trading scenarios, remaining stable under high-frequency and complex transaction workloads
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99.5% uptime SLA, with indexing updates tightly synchronized with API updates to ensure data accuracy, consistency, and timeliness
Bitcoin × Fractal Bitcoin, Seamlessly
Free development, low-cost testing, smooth migration to mainnet
UniSat enables deep interoperability between Bitcoin and Fractal Bitcoin through a fully aligned data and API architecture:
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Fractal Bitcoin APIs are completely free
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Identical data structures and API interfaces to Bitcoin mainnet
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Developers can seamlessly switch to Fractal Bitcoin during development and testing when mainnet API costs are high
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Once functionality, logic, and performance are fully validated, projects can smoothly migrate to paid Bitcoin mainnet APIs
This design significantly lowers development costs and experimentation risk—making Bitcoin application development faster, more efficient, and fully under control.
A Unified Interface for Bitcoin-Related Data
Category
Description
Blockchains
Blockchain info, fees, blocks, transactions, address UTXO data
Inscriptions
Ordinals inscription metadata, content, events and address holdings
BRC20
BRC20 token protocol: token list, holders, transaction history and address activity
Runes
Runes protocol: token info, holders, balance and events
Alkanes
Alkanes protocol: token list, holders and contract events
brc2.0
brc2.0 token protocol: token list, holders, transaction history and address activity
UniSat Inscribe
Inscription creation and management
MarketPlace
Trading marketplace for BRC20, Runes, Alkanes, NFT collections and domain names
Fractal
Fractal network: supply info, address statistics
InSwap
Swap functionality for BRC20 tokens
• Sample data - Snapshot at 2026-01-01 00:00 UTC
// Get block info by height
{
"code": 0,
"msg": "ok",
"data": {
"height": 888888,
"version": 616316928,
"auxpow": false,
"id": "00000000000000000001347938c263a968987bf444eb9596ab0597f721e4e9e8",
"prev": "000000000000000000005fa5624a14bfef0d85b6d51e505c0e3ee85ac64136ea",
"next": "0000000000000000000069ddba0dd2cc8a7dacd489759b65c605a5748cd1cbf0",
"merkle": "0500a9ae9ed906201d6f5fc197a759890178690326a3ad94c8b9152ddb55c8e3",
"ntx": 2511,
"inSatoshi": 193855337338,
"outSatoshi": 193840929772,
"coinbaseOut": 326907566,
"timestamp": 1742634951,
"bits": 386040449,
"size": 2602297
}
}Documentation & Support
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