Connect to Optimism (OP Mainnet), the pioneering Ethereum Layer 2 and home of the OP Stack. Experience low fees, EVM equivalence, and the growing Superchain ecosystem.
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Mainnet & Testnet Support — OP Sepolia
Optimism (OP Mainnet) is the original and pioneering Ethereum Layer 2 using optimistic rollup technology. As the creator of the OP Stack — now powering Base, Worldcoin, and dozens of other chains in the Superchain ecosystem — Optimism combines proven technology with a vision for scalable, interoperable blockchains governed by its community.
https://rpc.crypto-chief.com/optimism/{YOUR_API_KEY}
wss://rpc.crypto-chief.com/optimism/ws/{YOUR_API_KEY}
Replace {YOUR_API_KEY} with your actual API key from the dashboard.
Access the original Ethereum Layer 2
An Optimism RPC node provides applications with access to OP Mainnet, the pioneering optimistic rollup and foundation of the Superchain ecosystem. Optimism enables low-cost Ethereum transactions while maintaining full EVM equivalence, making it a seamless migration path for Ethereum developers.
Optimism didn't just create a Layer 2 — it created the OP Stack, a modular framework now powering an ecosystem of interoperable chains including Base (Coinbase), Worldcoin, Zora, and Mode. This vision of the 'Superchain' — multiple L2s sharing security and seamlessly communicating — represents the future of Ethereum scaling.
Optimism advantages:
Optimistic rollups assume transactions are valid by default (optimistic assumption). Transactions are executed off-chain, bundled, and posted to Ethereum. A 7-day challenge period allows anyone to submit fraud proofs if invalid transactions are detected. This approach achieves massive scalability while inheriting Ethereum's security.
Optimism architecture:
The Superchain is Optimism's vision for a network of OP Stack chains that share security, bridging, and governance. Chains like Base, Mode, and Zora can seamlessly communicate, share liquidity, and benefit from Ethereum's security — creating a scalable, interoperable blockchain network.
This approach contrasts with isolated L2s, instead building toward a unified, modular ecosystem where chains specialize while remaining interconnected.
Quick start for developers
Optimism supports all standard Ethereum JSON-RPC methods with full EVM equivalence:
const { ethers } = require('ethers');
const provider = new ethers.JsonRpcProvider('https://rpc.crypto-chief.com/optimism/YOUR_API_KEY');
// Verify we're on Optimism
const network = await provider.getNetwork();
console.log('Chain ID:', network.chainId); // 10
// Get ETH balance on Optimism
const balance = await provider.getBalance('0x...');
console.log('OP ETH:', ethers.formatEther(balance));
// Interact with Velodrome (major Optimism DEX)
const VELODROME_ROUTER = '0xa062aE8A9c5e11aaA026fc2670B0D65cCc8B2858';
const routerABI = ['function getAmountsOut(uint, address[]) view returns (uint[])'];
const router = new ethers.Contract(VELODROME_ROUTER, routerABI, provider);
// Get price quote
const weth = '0x4200000000000000000000000000000000000006';
const usdc = '0x7F5c764cBc14f9669B88837ca1490cCa17c31607';
const amounts = await router.getAmountsOut(
ethers.parseEther('1'),
[weth, usdc]
);
console.log('1 ETH =', Number(amounts[1]) / 1e6, 'USDC');from web3 import Web3
w3 = Web3(Web3.HTTPProvider('https://rpc.crypto-chief.com/optimism/YOUR_API_KEY'))
print('Connected to Optimism:', w3.is_connected())
print('Chain ID:', w3.eth.chain_id) # 10
print('Latest block:', w3.eth.block_number)
print('Gas price:', w3.eth.gas_price, 'wei')
# Very low gas on Optimism
gas_gwei = w3.from_wei(w3.eth.gas_price, 'gwei')
print(f'Gas: {gas_gwei} Gwei')const { ethers } = require('ethers');
const provider = new ethers.WebSocketProvider('wss://rpc.crypto-chief.com/optimism/ws/YOUR_API_KEY');
// Monitor new blocks (every ~2s)
provider.on('block', async (blockNumber) => {
const block = await provider.getBlock(blockNumber);
console.log(`OP block ${blockNumber}: ${block.transactions.length} txs`);
});
// Monitor OP token transfers
const OP_TOKEN = '0x4200000000000000000000000000000000000042';
const filter = {
address: OP_TOKEN,
topics: [ethers.id('Transfer(address,address,uint256)')]
};
provider.on(filter, (log) => {
console.log('OP transfer:', log);
});Enterprise Optimism infrastructure
Optimized infrastructure delivering <65ms latency with intelligent routing and OP Stack-specific caching strategies.
Enterprise-grade security with 99.9% uptime, DDoS protection, and redundant architecture for mission-critical applications.
Monitor Optimism-specific metrics including L1 data costs, sequencer activity, and Superchain interactions.
Strategically deployed nodes across continents ensuring low latency for Optimism's global user base.
Infrastructure automatically scales during high traffic maintaining consistent performance across all conditions.
24/7 support from engineers with deep Optimism, OP Stack, and Superchain ecosystem expertise.
Build on the Superchain foundation
Optimism's proven technology and Superchain vision make it ideal for DeFi protocols, NFT platforms, and applications requiring Ethereum security with Layer 2 economics.
Launch DeFi applications on Optimism with established protocols like Velodrome, Aave, and Uniswap. Low fees enable sophisticated strategies and high-frequency operations.
Build NFT marketplaces and collections on Optimism. Low minting and trading costs make NFTs accessible for creators and collectors alike.
Develop cross-chain applications leveraging the Superchain ecosystem. Build protocols that seamlessly interact with Base, Mode, Zora, and other OP Stack chains.
Integrate Optimism into multi-chain wallets. Our infrastructure ensures smooth transaction processing and balance tracking for millions of users.
Create blockchain games on Optimism where low fees enable frequent in-game transactions and asset transfers without prohibitive costs.
Build bridges, relayers, and infrastructure services connecting Optimism to other chains. Support the growing Superchain ecosystem.
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
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