A minimalist UTXO tracker for HD Wallets. Used primarily with BTCPayServer.
You probably don't want to use nbxplorer directly but install BTCPayServer. If you need to use it directly, you can find the port in /etc/nbxplorer-mainnet/nbxplorer.conf and the cookie in /var/lib/nbxplorer-mainnet/Main/.cookie.
Warning: this is not considered a public API and may change!