Connect to Sei, the first parallelized EVM blockchain optimized for trading. Experience 390ms finality, native order matching, and infrastructure purpose-built for DeFi.
Requests per Day
Network Uptime
Average Response Time
Technical Support
Technical characteristics and available endpoints
Mainnet & Testnet Support
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.
https://rpc.crypto-chief.com/sei/{YOUR_API_KEY}
wss://rpc.crypto-chief.com/sei/ws/{YOUR_API_KEY}
Replace {YOUR_API_KEY} with your actual API key from the dashboard.
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.
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:
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:
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.
Quick start for developers
Sei supports all standard Ethereum JSON-RPC methods (Sei V2):
const { ethers } = require('ethers');
const provider = new ethers.JsonRpcProvider('https://rpc.crypto-chief.com/sei/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));from web3 import Web3
w3 = Web3(Web3.HTTPProvider('https://rpc.crypto-chief.com/sei/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}')const { ethers } = require('ethers');
const provider = new ethers.WebSocketProvider('wss://rpc.crypto-chief.com/sei/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);
});Trading-optimized infrastructure
Infrastructure optimized for 390ms finality delivering <55ms latency for trading-critical performance.
Enterprise infrastructure supporting high-frequency trading with 99.9% uptime and MEV protection.
Monitor orderbook activity, parallel execution efficiency, oracle feeds, and DeFi protocol performance.
Strategically deployed nodes ensuring minimal latency for global trading operations.
Infrastructure designed for 12.5K+ TPS handling professional trading volumes.
24/7 support from engineers specialized in Sei, parallelized EVM, and trading infrastructure.
Build professional trading platforms
Sei's trading-optimized architecture and 390ms finality enable professional-grade DEXs, derivatives platforms, and high-frequency DeFi applications.
Build order book-based DEXs leveraging Sei's native CLOB for professional trading experience rivaling centralized exchanges.
Launch perpetuals, futures, and options platforms where 390ms finality enables instant position management and liquidations.
Develop high-frequency trading bots and arbitrage strategies leveraging Sei's speed and built-in oracle feeds.
Create lending, yield farming, and liquidity protocols benefiting from fast finality and parallelized execution.
Build real-time trading analytics and data platforms leveraging Sei's fast blocks and comprehensive on-chain data.
Develop trading-focused wallets with instant order execution, portfolio tracking, and integrated DEX access.
Start building on Web3 — no credit card.
Flexible pay-as-you-go for any workload.
From $500 monthly plus 20% extra value.
Tailored solution for expert builders
All Subscription features plus: