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I have an arbitrary address. How can I get the current balance of the account through a Web API? ... how do I get it for a local API?

I'm also interested in all transaction history for that address. Let me know if the API can offer that as well.

  • Anyone with a local API solution to the same question? – qdot Jan 12 '14 at 9:16
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You can query the unspent outputs of an address with this:

 http://blockchain.info/unspent?active=$bitcoin_address

You can get the transaction history for an address with this:

 http://blockchain.info/address/$bitcoin_address?format=json

For more information see http://blockchain.info/api/blockchain_api

  • Nice, ?format=json is useful! – Waqar Lim Jan 8 '14 at 20:26

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