JSON-RPC Overview

Introduction

Ethereum RPC

Base RPC

Polygon RPC

BNB Smart Chain RPC

Arbitrum RPC

Optimism RPC

Avalanche RPC

Linea RPC

Gnosis RPC

Ronin RPC

Lisk RPC

Flow RPC

Pulsechain RPC

zkSync RPC

Mantle RPC

Polygon zkEVM RPC

opBNB RPC

Moonbeam RPC

Blast RPC

What is JSON-RPC?

JSON-RPC is a lightweight, remote procedure call (RPC) protocol that uses JSON to encode messages. It enables applications to invoke methods on remote systems as if they were local.

Key Characteristics

Protocol-Agnostic - Works over HTTP, WebSocket, and other transports
Stateless - Each request is independent
Lightweight - JSON formatting minimizes overhead while remaining human-readable

Request Structure

A JSON-RPC request contains:

Field	Description
`jsonrpc`	Protocol version (always “2.0”)
`method`	Name of the method to call
`params`	Method parameters (array or object)
`id`	Unique request identifier

Example Request

{
  "jsonrpc": "2.0",
  "method": "eth_getBalance",
  "params": ["0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045", "latest"],
  "id": 1
}

Response Structure

Field	Description
`jsonrpc`	Protocol version
`result`	Method result (if successful)
`error`	Error object (if failed)
`id`	Matching request identifier

Example Response

{
  "jsonrpc": "2.0",
  "result": "0x1234567890abcdef",
  "id": 1
}

Common Methods

Method	Description
`eth_blockNumber`	Get the latest block number
`eth_getBalance`	Get account balance
`eth_getTransactionByHash`	Get transaction details
`eth_sendRawTransaction`	Submit a signed transaction
`eth_call`	Execute a read-only contract call
`eth_getLogs`	Get event logs

Use Cases

Wallets - Query balances and submit transactions
dApps - Interact with smart contracts
Indexers - Fetch and process blockchain data
Trading Bots - Monitor state and execute trades

Supported Chains Archive Requests

⌘I

​What is JSON-RPC?

​Key Characteristics

​Request Structure

​Example Request

​Response Structure

​Example Response

​Common Methods

​Use Cases