How do I determine the balance of an address I don't own? (WebAPI or local API)

Question

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 — qdot, Jan 12 '14 at 9:16

Christopher Jon Mankowski · Accepted Answer · 2014-01-08 20:30:59Z

5

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

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answered Dec 12 '13 at 22:08

hsmiths

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