# Arbitrum One

> Ethereum L2 focused on low-cost EVM execution, DeFi liquidity, Orbit chains, and Stylus development.

- Chain ID: 42161
- Ecosystem: arbitrum
- Supported protocols/dApps in registry: 21
- Last verified: 2026-06-02 by composewith (confidence: medium)

## Best for

- DeFi applications that need low-cost EVM execution
- Appchain teams evaluating Orbit
- Rust smart-contract experimentation through Stylus

## Tradeoffs

- Bridge and sequencer assumptions differ from Ethereum mainnet
- Orbit and Stylus choices add architecture-specific integration work

## Build on Arbitrum One

- [build a DeFi app on Arbitrum One](https://composewith.eth/intents/arbitrum-defi-app) — uniswap, pyth, the-graph, gelato, safe

## Chain readiness

- [Arbitrum One](https://composewith.eth/protocols/arbitrum-one) — 50/100 (claimed, no evidence record)
- [Arbitrum Orbit](https://composewith.eth/protocols/arbitrum-orbit) — 50/100 (claimed, no evidence record)
- [Arbitrum Stylus](https://composewith.eth/protocols/arbitrum-stylus) — 50/100 (claimed, no evidence record)
- [Biconomy](https://composewith.eth/protocols/biconomy) — 50/100 (claimed, no evidence record)
- [Chainlink](https://composewith.eth/protocols/chainlink) — 50/100 (claimed, no evidence record)
- [Fluidkey](https://composewith.eth/protocols/fluidkey) — 50/100 (claimed, no evidence record)
- [Gelato](https://composewith.eth/protocols/gelato) — 50/100 (claimed, no evidence record)
- [Goldsky](https://composewith.eth/protocols/goldsky) — 50/100 (claimed, no evidence record)
- [Hyperlane](https://composewith.eth/protocols/hyperlane) — 50/100 (claimed, no evidence record)
- [LayerZero](https://composewith.eth/protocols/layerzero) — 50/100 (claimed, no evidence record)
- [Lighthouse Storage](https://composewith.eth/protocols/lighthouse-storage) — 50/100 (claimed, no evidence record)
- [MACI](https://composewith.eth/protocols/maci) — 50/100 (claimed, no evidence record)
- [Privy](https://composewith.eth/protocols/privy) — 50/100 (claimed, no evidence record)
- [Pyth Network](https://composewith.eth/protocols/pyth) — 50/100 (claimed, no evidence record)
- [RAILGUN](https://composewith.eth/protocols/railgun) — 50/100 (claimed, no evidence record)
- [Safe](https://composewith.eth/protocols/safe) — 50/100 (claimed, no evidence record)
- [The Graph](https://composewith.eth/protocols/the-graph) — 50/100 (claimed, no evidence record)
- [Uniswap](https://composewith.eth/protocols/uniswap) — 50/100 (claimed, no evidence record)
- [x402](https://composewith.eth/protocols/x402) — 50/100 (claimed, no evidence record)
- [ZeroDev](https://composewith.eth/protocols/zerodev) — 50/100 (claimed, no evidence record)
- [ERC-8004](https://composewith.eth/protocols/erc-8004) — 40/100 (claimed, no evidence record)

## Relevant stack recommendations

- [show human-readable names and identity](https://composewith.eth/intents/add-ens-names-to-my-app) — privy
- [ship a consumer app on Base](https://composewith.eth/intents/base-consumer-app) — zerodev, x402, uniswap, chainlink
- [build an agentic commerce platform with x402 payments](https://composewith.eth/intents/build-agentic-commerce-with-x402) — x402, erc-8004, privy, goldsky, safe
- [build a dApp on BNB Smart Chain (BSC)](https://composewith.eth/intents/build-on-bnb-smart-chain) — biconomy, pyth, the-graph, safe, gelato
- [build a privacy-first Ethereum wallet](https://composewith.eth/intents/build-privacy-first-ethereum-wallet) — railgun, fluidkey
- [build private onchain voting](https://composewith.eth/intents/build-private-onchain-voting) — maci, the-graph
- [build with smart accounts](https://composewith.eth/intents/build-with-smart-accounts) — zerodev, privy, the-graph, safe
- [deploy on a low-cost Ethereum L2](https://composewith.eth/intents/deploy-on-a-low-cost-l2) — arbitrum-one
- [build a privacy-first app on Ethereum mainnet](https://composewith.eth/intents/ethereum-mainnet-privacy-app) — railgun, maci, fluidkey
- [need gasless onboarding](https://composewith.eth/intents/gasless-onboarding) — privy, biconomy, zerodev, arbitrum-one
- [want to launch an appchain](https://composewith.eth/intents/launch-an-appchain) — arbitrum-orbit, hyperlane, goldsky, safe
- [build an app on the OP Superchain (Optimism)](https://composewith.eth/intents/optimism-superchain-app) — zerodev, uniswap, chainlink, layerzero
- [need real-time price feeds](https://composewith.eth/intents/real-time-price-feeds) — pyth, arbitrum-one, gelato
- [send secure cross-chain messages](https://composewith.eth/intents/secure-cross-chain-messaging) — layerzero, hyperlane, chainlink
- [let users swap tokens inside my app](https://composewith.eth/intents/swap-tokens-in-my-app) — uniswap, pyth
- [want to write smart contracts in Rust](https://composewith.eth/intents/write-smart-contracts-in-rust) — arbitrum-stylus, arbitrum-one, the-graph

## Protocols/dApps supporting Arbitrum One

- [Chainlink](https://composewith.eth/protocols/chainlink) — 100/100 — Decentralized oracle network providing price feeds, verifiable randomness (VRF), automation, and cross-chain messaging (CCIP) to smart contracts.
- [ZeroDev](https://composewith.eth/protocols/zerodev) — 100/100 — Smart account infrastructure for ERC-4337 and EIP-7702 apps, including Kernel accounts, bundlers, paymasters, session keys, gas sponsorship, and chain abstraction.
- [Arbitrum Orbit](https://composewith.eth/protocols/arbitrum-orbit) — 94/100 — Framework for launching customizable L2/L3 chains using the Arbitrum Nitro stack.
- [MACI](https://composewith.eth/protocols/maci) — 94/100 — Minimal Anti-Collusion Infrastructure for private, coercion-resistant onchain voting with encrypted votes, zk-SNARK tally proofs, and verifiable public results.
- [Uniswap](https://composewith.eth/protocols/uniswap) — 94/100 — Onchain automated market maker for token swaps and liquidity, with v4 hooks for customizable pools, the Universal Router for trade routing, and TypeScript SDKs for integration.
- [Fluidkey](https://composewith.eth/protocols/fluidkey) — 93/100 — Self-custodial privacy dApp for receiving, managing, and spending onchain funds through stealth-address smart accounts and a unified wallet interface.
- [RAILGUN](https://composewith.eth/protocols/railgun) — 91/100 — Onchain zero-knowledge privacy system and SDK for shielding ERC-20 tokens, private transfers, and private DeFi interactions on major EVM chains.
- [x402](https://composewith.eth/protocols/x402) — 89/100 — HTTP-native payment protocol for programmatic stablecoin payments, API monetization, paid content, and agent-to-service commerce.
- [LayerZero](https://composewith.eth/protocols/layerzero) — 87/100 — Omnichain interoperability protocol for passing arbitrary messages and moving tokens between chains via on-chain endpoints and configurable verification.
- [Hyperlane](https://composewith.eth/protocols/hyperlane) — 84/100 — Permissionless interoperability protocol for crosschain messaging and custom interchain security.
- [Privy](https://composewith.eth/protocols/privy) — 82/100 — Embedded wallet and auth infrastructure for onboarding users with email, socials, and wallets.
- [Pyth Network](https://composewith.eth/protocols/pyth) — 82/100 — Low-latency oracle network for price feeds and market data used by DeFi applications.
- [Arbitrum One](https://composewith.eth/protocols/arbitrum-one) — 80/100 — General-purpose EVM L2 for lower-cost Solidity applications with broad ecosystem support.
- [Arbitrum Stylus](https://composewith.eth/protocols/arbitrum-stylus) — 80/100 — WASM smart contract runtime for writing Arbitrum contracts in Rust, C, and C++ alongside EVM contracts.
- [Safe](https://composewith.eth/protocols/safe) — 80/100 — Smart account infrastructure for multisigs, treasury operations, and programmable account controls.
- [The Graph](https://composewith.eth/protocols/the-graph) — 80/100 — Decentralized indexing protocol for querying blockchain data through subgraphs.
- [Biconomy](https://composewith.eth/protocols/biconomy) — 79/100 — Account abstraction tooling for smart accounts, paymasters, bundlers, and gasless onboarding.
- [Gelato](https://composewith.eth/protocols/gelato) — 79/100 — Automation, relaying, and web3 functions infrastructure for scheduled and event-driven execution.
- [Goldsky](https://composewith.eth/protocols/goldsky) — 79/100 — Realtime crypto data pipelines, subgraphs, and streaming infrastructure for app data products.
- [Lighthouse Storage](https://composewith.eth/protocols/lighthouse-storage) — 79/100 — IPFS and Filecoin storage tooling for decentralized files, metadata, and app assets.
- [ERC-8004](https://composewith.eth/protocols/erc-8004) — 78/100 — Trustless agent discovery and trust infrastructure using onchain identity, reputation, and validation registries for autonomous agents.

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Canonical: https://composewith.eth/chains/arbitrum-one · JSON: https://composewith.eth/chains/arbitrum-one.json