user26802: Is it possible to view the balance of an address at a specific height, without using any external web api?
Could it perhaps be done using bx or the Bitcoin client API?

user3697: This is relatively hard to achieve, because if you wish to allow querying any address at any height you deal with a LOT of data. You probably would need serve database server (cluster).
I'm pretty sure, getting a balance at a specific height from a specific address is not possible over a existing app or API.
You could try built it yourself with bitcoin-core as basis.
Maybe have a look at the >1year old address index patch from Johnathan Corgan. But it would required additional to allow a API where you could define the height.
But caching every address at every possible height (Juli 29 2015: 367456, amount of addresses ~250k) is nearly impossible.

26802: <p>Is it possible to view the balance of an address at a specific height, without using any external web api?</p>

<p>Could it perhaps be done using <a href="https://github.com/libbitcoin/libbitcoin-explorer" rel="nofollow">bx</a> or the <a href="https://en.bitcoin.it/wiki/Original_Bitcoin_client/API_calls_list" rel="nofollow">Bitcoin client API</a>?</p>
 3697: <p>This is relatively hard to achieve, because if you wish to allow querying any address at any height you deal with a <strong>LOT</strong> of data. You probably would need serve database server (cluster).</p>

<p>I'm pretty sure, getting a balance at a specific height from a specific address is not possible over a existing app or API.</p>

<p>You could try built it yourself with bitcoin-core as basis.
Maybe have a look at the >1year old <a href="https://github.com/bitcoin/bitcoin/pull/3652" rel="nofollow">address index patch</a> from Johnathan Corgan. But it would required additional to allow a API where you could define the height.</p>

<p>But caching every address at every possible height (Juli 29 2015: 367456, amount of addresses ~250k) is nearly impossible.</p>
