We've taken the Blockbook REST API and made it available via JSON-RPC. This is the best way to get indexed data for UTXO chains like Bitcoin.
This add-on uses 20 credits per method call, 10 credit for the bb_* namespaced call, and another for an underlying REST API call to the server.
Docs available at https://www.quicknode.com/docs/bitcoin/bb_getaddress