Bitcoin balance checker

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I am building an application and that will involve large set of bitcoin wallets and need to keep on checking for balance. Is there any way I can check bitcoin wallets balance without any API? I am not sure is Bitcoin Demon and Bitcoin Core is for this purpose. Can anyone please suggest me the best way to verify bitcoin balances and transactions without any limits. If you are not going to use a 3rd party API, you’ll need to run a node and add each address you want to query as a watch only address.

This actually might be harder than it seems. The blockchain does not store addresses and their corresponding balances. You could craft the query as an HTML POST or GET message sent to a blockchain-explorer’s website and parse the output received. Doesn’t it again calling a third-party website blockchain. As suggested you can run your own node , and run a service like abe to index transactions. You could also run copay wallet along with the node.

You could also try blockonomics – wallet watcher . They are optimized for checking balance of large number of addresses at once. The free plan is restricted to 50 address, you can easily upgrade to upto 1000 addresses. Not the answer you’re looking for? Bitcoin API – How can I identify new incoming payments? Bitcoin and Litecoin wallets with push notification API?

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