The observer
What anyone already knows.
Put in an address on chain 4663, yours or anyone's, and read back what a passive observer derives from it without asking permission: the balance, the counterparties, the assets, the timing. Nothing here is inferred and nothing is added. It is what the chain answers to whoever asks.
What using this costs you
The read goes through our proxy, so the request passes us in flight. The proxy records the method name, how many requests were in the batch, the status and the duration, and nothing else: the logging module cannot be passed an address at all. If you would rather not pass it through us, every call this page makes is an ordinary one you can make against any public endpoint yourself.
This is the default. A public ledger answers this about every address that has ever been used, to anyone, forever, and the holder is the only participant who never agreed to it.
A stealth address is the one thing on this page that comes back empty, and only until it is used. That is not a flaw in the demonstration. It is the whole product: the trade goes through, and there is nothing here to read afterwards.