> ## 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.

# Ku Coin (KCS) Overview

Ku Coin (KCS) RPC

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

## What is Ku Coin?

Ku Coin is an EVM-compatible mainnet. Its ticker symbol is `KCS`.

## What is the Ku Coin (KCS) 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=321`. Include the JSON-RPC method and params in the request body.

## Supported networks

| Network         | Symbol | Type    | Chain ID |
| --------------- | ------ | ------- | -------- |
| Ku Coin         | `KCS`  | Mainnet | `321`    |
| Ku Coin Testnet | `KCS`  | Testnet | `322`    |

## API reference

Browse the available method groups for this chain:

* [Debug](/reference/jsonrpc-docs/321/debug/debug-get-bad-blocks)
* [EVM](/reference/jsonrpc-docs/321/evm/eth-block-number)