> ## 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.

# Sei Network Mainnet (SEI) Overview

Sei Network Mainnet (SEI) RPC

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

## What is Sei Network Mainnet?

Sei Network Mainnet is an EVM-compatible mainnet. Its ticker symbol is `SEI`.

## What is the Sei Network Mainnet (SEI) 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=1329`. Include the JSON-RPC method and params in the request body.

## Supported networks

| Network             | Symbol | Type    | Chain ID |
| ------------------- | ------ | ------- | -------- |
| Sei Network Mainnet | `SEI`  | Mainnet | `1329`   |
| Sei Testnet         | `SEI`  | Testnet | `1328`   |

## API reference

Browse the available method groups for this chain:

* [Debug](/reference/jsonrpc-docs/1329/debug/debug-trace-block-by-hash)
* [EVM](/reference/jsonrpc-docs/1329/evm/eth-accounts)
* [Trace](/reference/jsonrpc-docs/1329/trace/trace-block)