> ## 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.

# ZKsync (ETH) Overview

ZKsync (ETH) RPC

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

## What is ZKsync?

ZKsync is an EVM-compatible mainnet. Its ticker symbol is `ETH`.

## What is the ZKsync (ETH) 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=324`. Include the JSON-RPC method and params in the request body.

## Supported networks

| Network        | Symbol | Type    | Chain ID |
| -------------- | ------ | ------- | -------- |
| ZKsync         | `ETH`  | Mainnet | `324`    |
| ZKSync Testnet | `ETH`  | Testnet | `300`    |

## API reference

Browse the available method groups for this chain:

* [Debug](/reference/jsonrpc-docs/324/debug/debug-get-bad-blocks)
* [EVM](/reference/jsonrpc-docs/324/evm/eth-accounts)
* [Trace](/reference/jsonrpc-docs/324/trace/trace-block)
* [ZKS](/reference/jsonrpc-docs/324/zks/zks-estimate-fee)