# Sei RPC Node  
Built for Trading

Connect to Sei, the first parallelized EVM blockchain optimized for trading. Experience 390ms finality, native order matching, and infrastructure purpose-built for DeFi.

[Documentation](https://docs-rpc.crypto-chief.com/chains/sei) [Get a free endpoint ](https://auth.crypto-chief.com/registration)

##### 8 M+

Requests per Day

##### 99.9 %

Network Uptime

##### < 55 ms

Average Response Time

##### 24/7

Technical Support

## Specification Sei Network

Technical characteristics and available endpoints

![Sei (SEI)](/img/protocols/sei.svg)

### Sei (SEI)

Mainnet & Testnet Support

Chain ID 1329

Protocol HTTPS / WSS

Uptime 99.9%

Finality \~390ms

TPS 12,500+

Architecture Parallelized EVM

Sei is the first parallelized EVM blockchain specifically optimized for trading and DeFi applications. Achieving 390ms finality and 12,500+ TPS through optimistic parallelization, Sei V2 combines EVM compatibility with a native on-chain orderbook (CLOB), built-in oracle feeds, and DeFi-focused infrastructure. This trading-first design makes Sei ideal for DEXs, derivatives, and high-frequency trading applications.

#### Key capabilities:

- 390ms finality — fastest among major chains
- 12,500+ transactions per second
- Parallelized EVM for maximum throughput
- Native on-chain orderbook (CLOB)
- Built-in oracle price feeds
- Optimistic parallelization of transactions
- Full EVM compatibility (Sei V2)
- Trading-optimized execution layer
- Growing DeFi and derivatives ecosystem

#### 🔗 RPC Endpoints

HTTPS

`https://rpc.crypto-chief.com/sei-evm/{YOUR_API_KEY}`

WSS

`wss://rpc.crypto-chief.com/sei-evm/ws/{YOUR_API_KEY}`

COSMOS

`https://rpc.crypto-chief.com/sei-cosmos/{YOUR_API_KEY}`

EVM endpoints (HTTPS/WSS) and a Cosmos REST endpoint are both available — pick whichever fits your client SDK.

## What is a Sei RPC Node?

Access trading-optimized blockchain

A Sei RPC node provides applications with access to the first blockchain specifically built for trading, featuring 390ms finality and parallelized execution. Sei's architecture optimizes for the unique demands of DeFi — order matching, price feeds, and high-frequency operations — making it the ideal infrastructure for trading platforms.

### Why Sei for trading

Most blockchains were designed as general-purpose platforms. Sei was built specifically for **trading** — with native orderbook, built-in oracles, and optimistic parallelization enabling trading-level performance. The 390ms finality means near-instant trade execution, critical for professional trading and arbitrage.

**Sei advantages:**

- **390ms finality** — fastest finality among major chains
- **Trading-optimized** — built specifically for DeFi
- **Parallelized EVM** — 12,500+ TPS throughput
- **Native CLOB** — on-chain central limit orderbook
- **Built-in oracles** — native price feed infrastructure
- **EVM compatible** — familiar Solidity development

### Optimistic parallelization

Sei uses **optimistic parallelization** — transactions execute in parallel assuming no conflicts. If conflicts are detected, only conflicting transactions re-execute sequentially. This approach dramatically increases throughput for independent transactions while handling dependencies correctly.

**How Sei parallelization works:**

1. Transactions execute in parallel optimistically
2. System detects state conflicts during execution
3. Conflicting transactions re-execute sequentially
4. Independent transactions benefit from parallelization
5. Achieves 12,500+ TPS with 390ms finality

### Native trading primitives

Sei provides **native trading primitives** including a central limit orderbook (CLOB) and oracle price feeds built into the protocol. This means DEXs can leverage battle-tested order matching without building from scratch, while oracle feeds provide reliable price data without external dependencies.

These trading-specific features make Sei uniquely suited for derivatives, perpetuals, spot trading, and sophisticated DeFi applications.

## Technical Documentation

Quick start for developers

### Supported RPC Methods

Sei supports all standard Ethereum JSON-RPC methods (Sei V2):

- **eth\_blockNumber** — current block number
- **eth\_getBalance** — SEI balance
- **eth\_call** — execute view functions
- **eth\_sendRawTransaction** — broadcast transactions
- **eth\_getTransactionReceipt** — transaction confirmation
- **eth\_getLogs** — event logs
- **eth\_gasPrice** — current gas price
- **eth\_estimateGas** — gas estimation
- **eth\_subscribe** — WebSocket subscriptions

### Code Examples

💻

#### JavaScript (ethers.js) — Sei Connection:

```
const { ethers } = require('ethers');

const provider = new ethers.JsonRpcProvider('https://rpc.crypto-chief.com/sei-evm/YOUR_API_KEY');

// Verify we're on Sei
const network = await provider.getNetwork();
console.log('Chain ID:', network.chainId); // 1329

// Get SEI balance
const balance = await provider.getBalance('0x...');
console.log('SEI Balance:', ethers.formatEther(balance));

// Interact with DEX on Sei
const DEX = '0x...';
const dexABI = [
  'function getAmountOut(uint256, address, address) view returns (uint256)',
  'function swap(address, address, uint256, uint256) external'
];
const dex = new ethers.Contract(DEX, dexABI, provider);

// 390ms finality = near-instant swaps
const amountOut = await dex.getAmountOut(
  ethers.parseEther('1'),
  '0xTokenA...',
  '0xTokenB...'
);
console.log('Amount out:', ethers.formatEther(amountOut));
```

💻

#### Python (web3.py) — Sei Setup:

```
from web3 import Web3

w3 = Web3(Web3.HTTPProvider('https://rpc.crypto-chief.com/sei-evm/YOUR_API_KEY'))

print('Connected to Sei:', w3.is_connected())
print('Chain ID:', w3.eth.chain_id)  # 1329
print('Latest block:', w3.eth.block_number)

# Fast finality on Sei
gas_price = w3.eth.gas_price
print(f'Gas price: {gas_price}')

# Get SEI balance
balance = w3.eth.get_balance('0x...')
print(f'SEI: {balance / 1e18}')
```

💻

#### WebSocket — Monitor Fast Trading:

```
const { ethers } = require('ethers');
const provider = new ethers.WebSocketProvider('wss://rpc.crypto-chief.com/sei-evm/ws/YOUR_API_KEY');

// Monitor blocks (390ms finality!)
provider.on('block', async (blockNumber) => {
  const block = await provider.getBlock(blockNumber);
  console.log(`Sei block ${blockNumber}: ${block.transactions.length} txs`);
});

// Monitor DEX swaps in real-time
const DEX = '0x...';
const filter = {
  address: DEX,
  topics: [ethers.id('Swap(address,uint256,uint256,address)')]
};

provider.on(filter, (log) => {
  console.log('Fast swap on Sei:', log);
});
```

### Sei Best Practices

- **Fast Finality:** Design UX for sub-second confirmation
- **Trading Focus:** Optimize for high-frequency operations
- **Native CLOB:** Leverage built-in orderbook where applicable
- **Oracle Feeds:** Use native price feeds for reliability
- **Parallelization:** Structure contracts to avoid conflicts
- **Testing:** Test thoroughly on Sei testnet

## Why choose us?

Trading-optimized infrastructure

### Sub-Second Finality

Infrastructure optimized for 390ms finality delivering &lt;55ms latency for trading-critical performance.

### Trading-Grade Security

Enterprise infrastructure supporting high-frequency trading with 99.9% uptime and MEV protection.

### Trading Analytics

Monitor orderbook activity, parallel execution efficiency, oracle feeds, and DeFi protocol performance.

### Global Trading Network

Strategically deployed nodes ensuring minimal latency for global trading operations.

### High-Frequency Scaling

Infrastructure designed for 12.5K+ TPS handling professional trading volumes.

### DeFi Trading Experts

24/7 support from engineers specialized in Sei, parallelized EVM, and trading infrastructure.

## Examples of Use

Build professional trading platforms

Sei's trading-optimized architecture and 390ms finality enable professional-grade DEXs, derivatives platforms, and high-frequency DeFi applications.

#### Professional DEXs

Build order book-based DEXs leveraging Sei's native CLOB for professional trading experience rivaling centralized exchanges.

#### Derivatives Trading

Launch perpetuals, futures, and options platforms where 390ms finality enables instant position management and liquidations.

#### HFT & Arbitrage

Develop high-frequency trading bots and arbitrage strategies leveraging Sei's speed and built-in oracle feeds.

#### DeFi Protocols

Create lending, yield farming, and liquidity protocols benefiting from fast finality and parallelized execution.

#### Trading Analytics

Build real-time trading analytics and data platforms leveraging Sei's fast blocks and comprehensive on-chain data.

#### Trading Wallets

Develop trading-focused wallets with instant order execution, portfolio tracking, and integrated DEX access.

## Got questions?  
we are here to help

## What is Sei? 

Sei is the first parallelized EVM blockchain built specifically for trading with 390ms finality, native orderbook, and built-in oracles.

## How does Sei achieve 390ms finality? 

Sei uses optimistic parallelization, efficient consensus, and trading-optimized architecture to achieve fastest finality among major blockchains.

## What is optimistic parallelization? 

Transactions execute in parallel assuming no conflicts. Conflicts are detected and resolved by re-executing conflicting transactions sequentially.

## Is Sei EVM compatible? 

Yes, Sei V2 is fully EVM-compatible. Deploy Solidity smart contracts using standard Ethereum development tools.

## What is Sei's native CLOB? 

CLOB (Central Limit Order Book) is Sei's built-in order matching engine enabling professional DEXs without custom orderbook implementation.

## Does Sei have built-in oracles? 

Yes, Sei provides native oracle price feeds at the protocol level, ensuring reliable price data for DeFi applications.

## What is the SEI token? 

SEI is Sei's native token used for gas fees, staking, and governance of the trading-focused blockchain.

## How is Sei different from other fast chains? 

Sei is specifically optimized for trading with native CLOB, built-in oracles, and parallelized execution — not just general-purpose speed.

## Do you support Sei testnet? 

Yes, we provide RPC access to both Sei mainnet (Chain ID 1329) and testnet for development.

## What trading platforms use Sei? 

Sei hosts DEXs, derivatives platforms, perpetual protocols, and trading infrastructure leveraging its trading-optimized design.

## Pricing that grows with your needs.

### Free

Start building on Web3 — no credit card.

##### $0

- 5 reqs/sec RPC
- 5 reqs/min Unified API
- 1 req/day AML
- Ultimate chains
- WSS, Statistics
- Community support

[Get started ](https://auth.crypto-chief.com/registration)

### Pay for use

Flexible pay-as-you-go for any workload.

##### From $10

- 400 reqs/sec RPC
- 300 reqs/min Unified API
- 5 reqs/sec AML
- EventStream
- Ultimate chains
- WSS, Whitelists, Statistics
- Support portal

[Get started](https://auth.crypto-chief.com/registration)

### Subscription

From $500 monthly plus 20% extra value.

##### From $500

- 400 reqs/sec RPC
- 300 reqs/min Unified API
- 5 reqs/sec AML
- EventStream
- Ultimate chains
- WSS, Whitelists, Statistics
- Support portal

[Get started ](https://auth.crypto-chief.com/registration)

### Enterprise

Tailored solution for expert builders

##### Custom terms

All Subscription features plus:

- Flexible rate limits
- Engineering team support
- Custom SLA
- Personal manager

[Contact Sales ](/contact/)