---
title: Blockchain RPC Protocol
description: The protocol used to query the blockchain.
---

This protocol is used to query information from the blockchain. For example, the LBRY hub uses this protocol to check for new blocks and to advance it into its own database.

- **Port:** 9245/TCP

See: [https://developer.bitcoin.org/reference/rpc/index.html](Bitcoin.org RPC API Reference) and [https://lbry.tech/api/blockchain](LBRY Blockchain API)