Connect to Arbitrum, the largest Ethereum Layer 2 by TVL. Experience low-cost transactions, high throughput, and complete EVM compatibility with Ethereum security.
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Technical characteristics and available endpoints
Mainnet & Testnet Support — Arbitrum Sepolia
Arbitrum One is the leading Ethereum Layer 2 scaling solution by total value locked (TVL), offering low-cost transactions with full EVM compatibility. Built on optimistic rollup technology, Arbitrum delivers Ethereum security while achieving significantly higher throughput and lower fees, making it the platform of choice for major DeFi protocols.
https://rpc.crypto-chief.com/arbitrum/{YOUR_API_KEY}
wss://rpc.crypto-chief.com/arbitrum/ws/{YOUR_API_KEY}
Replace {YOUR_API_KEY} with your actual API key from the dashboard.
Access the leading Ethereum Layer 2
An Arbitrum RPC node provides applications with access to the Arbitrum Layer 2 network, enabling low-cost Ethereum transactions, smart contract interactions, and DeFi operations at a fraction of mainnet costs. Arbitrum uses optimistic rollup technology to scale Ethereum while maintaining its security guarantees.
Arbitrum has emerged as the dominant Ethereum Layer 2 solution, capturing the largest share of L2 TVL and hosting the most established DeFi protocols. With the Nitro upgrade, Arbitrum combines near-instant finality with minimal fees, making it the go-to platform for sophisticated DeFi applications and trading.
Arbitrum advantages:
Arbitrum is an optimistic rollup that executes transactions off-chain and posts compressed transaction data to Ethereum. The system assumes transactions are valid (optimistic) but allows a challenge period where fraud proofs can revert invalid state transitions, ensuring security while maintaining high throughput.
Technical flow:
HTTPS endpoints serve standard blockchain operations — querying state, sending transactions, calling contracts, and reading historical data with high reliability.
WebSocket endpoints enable real-time subscriptions for new blocks, pending transactions, event logs, and live data feeds — critical for DEX interfaces, trading bots, and monitoring systems.
Quick start for developers
Arbitrum supports all standard Ethereum JSON-RPC methods plus Arbitrum-specific extensions:
const { ethers } = require('ethers');
const provider = new ethers.JsonRpcProvider('https://rpc.crypto-chief.com/arbitrum/YOUR_API_KEY');
// Verify we're on Arbitrum
const network = await provider.getNetwork();
console.log('Chain ID:', network.chainId); // 42161
// Get ETH balance on Arbitrum
const balance = await provider.getBalance('0x...');
console.log('ARB ETH:', ethers.formatEther(balance));
// Interact with GMX (major Arbitrum DEX)
const GMX_VAULT = '0x489ee077994B6658eAfA855C308275EAd8097C4A';
const vaultABI = ['function getMaxPrice(address) view returns (uint256)'];
const vault = new ethers.Contract(GMX_VAULT, vaultABI, provider);
const ethPrice = await vault.getMaxPrice('0x82aF49447D8a07e3bd95BD0d56f35241523fBab1');
console.log('ETH price from GMX:', Number(ethPrice) / 1e30);from web3 import Web3
w3 = Web3(Web3.HTTPProvider('https://rpc.crypto-chief.com/arbitrum/YOUR_API_KEY'))
print('Connected to Arbitrum:', w3.is_connected())
print('Chain ID:', w3.eth.chain_id) # 42161
print('Latest block:', w3.eth.block_number)
print('Gas price:', w3.eth.gas_price, 'wei')
# Very low gas on Arbitrum
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/arbitrum/ws/YOUR_API_KEY');
// Monitor new blocks (every ~0.25s)
provider.on('block', async (blockNumber) => {
const block = await provider.getBlock(blockNumber);
console.log(`Block ${blockNumber}: ${block.transactions.length} txs`);
});
// Monitor USDC transfers on Arbitrum
const USDC_ARB = '0xaf88d065e77c8cC2239327C5EDb3A432268e5831';
const filter = {
address: USDC_ARB,
topics: [ethers.id('Transfer(address,address,uint256)')]
};
provider.on(filter, (log) => {
console.log('USDC transfer:', log);
});Enterprise Arbitrum infrastructure for DeFi
Optimized for high-frequency DeFi with <65ms latency, advanced caching, and intelligent load balancing across global regions.
Enterprise-grade infrastructure with 99.9% uptime SLA, automatic failover, and redundant node clusters for mission-critical applications.
Comprehensive monitoring of all RPC metrics including request patterns, method distribution, error tracking, and performance analytics.
Strategic deployment across North America, Europe, and Asia with automatic geo-routing for optimal latency worldwide.
Infrastructure auto-scales during high trading volumes and market volatility maintaining consistent performance.
24/7 support from engineers with deep Arbitrum and Layer 2 experience. Average response time under 5 minutes for critical issues.
Power sophisticated DeFi on Arbitrum
Arbitrum's combination of low fees, high throughput, and massive TVL has made it the platform of choice for professional DeFi applications, derivatives trading, and complex financial protocols requiring Ethereum security.
GMX, Camelot, Radiant, and hundreds of DeFi protocols leverage Arbitrum's speed and low costs. Our infrastructure supports perpetual exchanges, lending markets, and complex yield strategies.
Arbitrum dominates on-chain derivatives with GMX and other perp DEXs. Our low-latency infrastructure is optimized for high-frequency trading and real-time price feeds.
Build sophisticated arbitrage and MEV strategies on Arbitrum. Our infrastructure provides the speed advantage needed for competitive trading in L2 environment.
Integrate Arbitrum into wallet applications with reliable RPC for balance tracking, transaction history, and seamless L2 bridge operations.
Build bridges and cross-chain protocols connecting Arbitrum to other L2s and L1s. Our infrastructure ensures reliable message passing and state verification.
Power block explorers, portfolio trackers, and on-chain analytics with our archive nodes supporting complex historical queries and data aggregation.
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: