# Arbitrum RPC and network details

Source: https://www.alchemy.com/rpc/arbitrum

Arbitrum is an optimistic rollup that inherits Ethereum security while delivering sub-cent gas fees and high throughput. Arbitrum's Orbit and Stylus tooling attract builders deploying complex, low-latency apps without leaving the Ethereum ecosystem.

## Network details

- Network: Mainnet
- Chain ID: 42161
- Environment: Mainnet
- Category: L2
- Native token: ARB
- Gas token: ETH
- Settlement: Ethereum
- Block time: <1s

## Endpoints

- Public RPC: https://arb-mainnet.g.alchemy.com/public
- Alchemy RPC: https://arb-mainnet.g.alchemy.com/v2/API_KEY
- Alchemy WebSocket: wss://arb-mainnet.g.alchemy.com/v2/API_KEY

Replace API_KEY with a key from https://dashboard.alchemy.com/signup.

## Alchemy product support

Supported on Arbitrum: RPC API, Transaction receipts API, Block Timestamp API, User OP Simulation API, Prices API, Debug API, Trace API, Bundler API, Token API, NFT API, Websockets, Gas Manager, Webhooks, Transfers API.

Not currently supported: gRPC.

## Build on Alchemy

Alchemy provides enterprise-grade Arbitrum RPC endpoints with low-latency and industry-leading throughput. You can also access tools like transaction tracing, real-time alerts, debugging APIs, and a full-featured dashboard to support your Arbitrum app.

## Available networks

- Arbitrum Sepolia (testnet): https://www.alchemy.com/rpc/arbitrum-sepolia

## Links

- Alchemy docs: https://docs.alchemy.com/reference/arbitrum-api-quickstart
- Official docs: https://docs.arbitrum.io/welcome/get-started
- Website: https://arbitrum.io/
- GitHub: https://github.com/OffchainLabs
- Block explorer: https://explorer.arbitrum.io
- Bridge: https://bridge.arbitrum.io/
- Faucet: https://www.alchemy.com/faucets/arbitrum-sepolia