Cryptocurrency — entry 012 of 53
Blockchain.com
Blockchain.com's free Explorer API returns JSON data for Bitcoin blocks, transactions, and addresses with no signup or key, alongside a Statistics/Charts API, an Exchange Rates API, and a WebSocket feed for real-time block and mempool notifications. Browser callers can opt individual GET requests into CORS by appending a cors=true parameter; this read-only data API is a separate product from Blockchain.com's API-key-gated Exchange trading API.
Blockchain.com's Explorer API exposes raw Bitcoin blockchain data — addresses, transactions, and blocks — as free, keyless JSON endpoints (distinct from Blockchain.com's paid Exchange trading API).
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<a href="https://greatapis.com/api/blockchain/"><img src="https://greatapis.com/badge/blockchain.svg" alt="Scored 94 on greatapis.com"></a>Auth quickstart
- No API key required — the Explorer endpoints are public and keyless
Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.
Address balance and transaction history
GEThttps://blockchain.info/rawaddr/1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa?limit=1
{
"address": "1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa",
"n_tx": 63452,
"total_received": 10723313025,
"total_sent": 0,
"final_balance": 10723313025,
"txs": [
{
"hash": "...",
"time": 1231469665,
"block_height": 170,
"fee": 0
}
]
}Developer reference
Gotchas & limits
- Monetary values (`total_received`, `final_balance`, etc.) are returned in satoshis, not BTC — divide by 100,000,000
- `txs` pagination is capped at `limit=50` per request — use `offset` to page through addresses with long histories
- There's no published SLA or official rate-limit number for the free Explorer endpoints — excessive polling can get your IP throttled, so cache responses where possible