> ## Documentation Index
> Fetch the complete documentation index at: https://docs.uniblock.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Arbitrum Nova (ARB) Overview

Arbitrum Nova (ARB) RPC

Use Uniblock's JSON-RPC endpoint to access Arbitrum Nova (ARB) with low-latency routing and a single API surface across providers.

## What is Arbitrum Nova?

Arbitrum Nova is an EVM-compatible mainnet. Its ticker symbol is `ARB`.

## What is the Arbitrum Nova (ARB) JSON-RPC API?

The JSON-RPC API is the standard interface for reading chain state, sending transactions, and interacting with smart contracts where supported.

## Making API requests

Send a POST request to `https://api.uniblock.dev/uni/v1/json-rpc?chainId=42170`. Include the JSON-RPC method and params in the request body.

## Supported networks

| Network       | Symbol | Type    | Chain ID |
| ------------- | ------ | ------- | -------- |
| Arbitrum Nova | `ARB`  | Mainnet | `42170`  |

## API reference

Browse the available method groups for this chain:

* [Arbtrace](/reference/jsonrpc-docs/42170/arbtrace/arbtrace-block)
* [Debug](/reference/jsonrpc-docs/42170/debug/debug-get-bad-blocks)
* [EVM](/reference/jsonrpc-docs/42170/evm/eth-accounts)