Arbitrum One

Arbitrum One is a Layer-2 scaling solution for Ethereum, enhancing transaction speed and efficiency by offloading processing to a secondary blockchain while remaining connected to the Ethereum mainnet.

Networks Mainnet
Released 2021
Consensus Rollups, Optimistic Rollups
Smart contracts Yes
Block time ~15 seconds
Smart contract language(s) supported Arbitrum Stylus, Rust, Solidity
Get started with Arbitrum One

Bitcoin
Ethereum
XRP Ledger
Ethereum Classic
Bitcoin Cash
Dash
Litecoin
Dogecoin
Zilliqa
View all supported

The Arbitrum One API — build without running a node

Access Arbitrum One blockchain data through one unified REST API: transaction and address data, balances, block data, and real-time webhooks for on-chain events — with no Arbitrum One node to run and maintain. Start free and scale as you grow.

Blockchain data

Read Arbitrum One transactions, addresses, balances, UTXOs, and block data through one REST API.

Real-time webhooks

Subscribe to on-chain events — incoming and outgoing transactions, confirmations, and mined blocks.

No node to run

Skip the infrastructure — managed, always-synced access with no node to operate or maintain.

View the API docs Start building free

Building a full wallet? Explore Wallet as a Service.

What makes Arbitrum One unique?

Arbitrum facilitates easy deployment of Ethereum-compatible smart contracts without modifications, easing the migration of dApps and DeFi protocols and reducing the Ethereum network load. Through Optimistic Rollup, it achieves fast, cost-effective off-chain transaction processing, with fraud proofs ensuring transaction validity and maintaining rapid speeds while upholding network security.