What is the chain ID for Arbitrum One?

Arbitrum One has chain ID 42161 (0xa4b1 in hexadecimal). You need this when adding Arbitrum One to MetaMask or other EVM wallets.

How do I add Arbitrum One to my wallet?

To add Arbitrum One to MetaMask: go to Settings > Networks > Add Network, then enter Chain ID 42161, an RPC URL (e.g., https://arb1.arbitrum.io/rpc), and currency symbol ETH.

What tokens can I create on Arbitrum One?

On Arbitrum One you can create ERC-20 (Fungible Tokens) and ERC-721 (NFTs) and ERC-1155 (Multi-Token) through ChainPortal. No coding experience is required.

What is ETH used for on Arbitrum One?

Ether (ETH) is the native currency of Arbitrum One. It is used to pay gas fees for transactions, including token creation, NFT minting, and transfers.

What RPC endpoints are available for Arbitrum One?

Arbitrum One provides multiple public RPC endpoints for connecting dApps and wallets. See the RPC list on this page for the latest available endpoints.

Arbitrum One

mainnetEVM

Arbitrum One is an EVM-compatible blockchain supporting ERC-20 tokens, ERC-721 NFTs, and ERC-1155 multi-token contracts. With a native currency of Ether (ETH) and EIP-1559 dynamic fee support, Arbitrum One offers developers a robust environment for deploying decentralized applications. ChainPortal lets you create tokens and NFTs on Arbitrum One with no coding required.

Chain ID

42161(0xa4b1)

Native Token

Ether (ETH)

Block Time

0.25s

EIP-1559

Yes