Arbitrum A leading Layer-2 optimistic rollup for Ethereum.

TVL 1.2B
APIs Enabled 15

A major Layer 2 scaling Ethereum with rollups

Broad Ethereum compatibility.

Fully EVM-compatible.

Lower costs, faster confirmations.

Optimistic rollup tech reduces fees and boosts throughput.

Expansive ecosystem.

Hosts one of the largest Layer 2 ecosystems with DeFi, gaming, NFTs, and more.

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Swap API Orderbook API Balance API Spot Price API Token API Transaction API Portfolio API Gas Price API NFT API Traces API History API Web3 RPC API Domain API Token Details API Charts API
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Answers to common questions and 24/7 support regardless of subscription.

Questions? Answers.

What public RPC endpoints exist for Arbitrum One?

Arbitrum One (main L2 rollup) provides public HTTPS and WebSocket RPC endpoints. It is optimized for DeFi and general-purpose dApps.

Do public Arbitrum RPCs support WebSockets and tracing?

Yes, WebSocket endpoints are supported for eth_subscribe events. 1inch also supports them.

How to add Arbitrum to your wallet (chain ID & RPC)?

Use the following settings: 

Mainnet:
Network name: Arbitrum One
RPC: https://arb1.arbitrum.io/rpc (rate-limited)
Chain ID: 42161
Symbol: ETH
Explorer: https://arbiscan.io

How to estimate gas and manage EIP-1559 fees on Arbitrum?

Use the 1inch Gas Price API.

Does Arbitrum support archive nodes to get logs (eth_getLogs) via 1inch?

Yes. eth_getLogs is supported, but large block ranges on public endpoints may be restricted. Use filtered queries and 1inch paid Web3 nodes.

How to avoid rate limits on Arbitrum in production?

Public endpoints apply request caps and throttling. For production workloads, especially high-frequency, leave the infrastructure and complexity to 1inch and start using the APIs range support on Arbitrium.

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