Ethereum JSON-RPC API

Ethereum protocol APIs refer to the APIs that provide direct access to the Ethereum blockchain network's protocol. These APIs enable developers to interact with the blockchain and perform various actions such as querying blocks, transactions, account balances, and sending transactions.

To use the Ethereum JSON-RPC API, developers must connect to an Ethereum node. This can be achieved by either running a local node using clients like Geth or OpenEthereum or connecting to a remote node provided by third-party services like Infura, Alchemy, or QuickNode.