Bitcoin Address
Reads public dataBalance, unspent outputs and activity for any Bitcoin address.
About bitcoin address
Bitcoin has no balance field anywhere in it. An address owns a set of unspent transaction outputs, and a payment destroys whole outputs and creates new ones, paying any remainder back to itself as change. The balance shown here is therefore just everything ever received minus everything ever spent. That model is also why the number of outputs matters as much as their total: each one costs vbytes to spend, so a wallet holding hundreds of tiny outputs can cost more in fees to empty than the outputs are worth — which is what makes unsolicited dust a nuisance rather than a gift. The lookup runs from your browser straight to mempool.space, so no server of ours ever learns which address you asked about.