Blockchain.com API
Blockchain.com API
Blockchain.com (formerly Blockchain.info) API provides Bitcoin block explorer data — BTC address balance, transactions, blocks, market quotes, Wallet API.
Long-established (founded 2011, Bitcoin OG)
BTC-specific (other chains use respective explorers)
GET https://blockchain.info/rawaddr/{btc_address} for address full transaction history. Or register API key for higher rate limits.
Uptime · 30-day window
About this API
Blockchain.com is a Bitcoin infrastructure company founded 2011, originally named Blockchain.info — the longest-standing Bitcoin block explorer + wallet provider. Before Ethereum and Etherscan, BTC users used blockchain.info to view transactions and blocks. Today the company has expanded to include the Blockchain.com exchange, institutional services, and crypto wallet (tens of millions of users). API mainly serves developers: query BTC address balance and transaction history, block details, network stats (hash rate, mempool status), market quotes, Wallet API (programmatic transactions). Free to use, tight rate limits (1 req/s), commercial needs Pro plan.
What you can build
- 1BTC wallet balance and transaction queries
- 2Bitcoin blockchain analysis
- 3BTC real-time price widgets
- 4Deposit/withdrawal address monitoring
Strengths & limitations
Strengths
- Long-established (founded 2011, Bitcoin OG)
- Free to use
- Deep BTC data
Limitations
- BTC-specific (other chains use respective explorers)
- Dated API design (no official SDK)
Example request
curl https://www.blockchain.com/<endpoint> \
-H "Authorization: Bearer $API_KEY"
# Some providers use X-Api-Key instead — verify in the docs.Getting started
GET https://blockchain.info/rawaddr/{btc_address} for address full transaction history. Or register API key for higher rate limits.
FAQ
Can it be used for other coins?+
Mainly BTC. Bitcoin Cash partially supported. Other coins use respective chain explorers.
Technical details
- Auth type
- api_key
- Pricing
- freemium
- Rate limit
- free 1 req/秒；Pro 更高
- Protocols
- REST, WebSocket
- SDKs
- javascript, python, go
- Response time
- 189 ms
- Last health check
- 5/12/2026, 7:37:09 AM