Arbitrum

aid: arbitrum
url: https://raw.githubusercontent.com/api-evangelist/arbitrum/refs/heads/main/apis.yml
name: Arbitrum
kind: company
description: >-
  Arbitrum is the Ethereum Layer 2 rollup ecosystem from Offchain Labs. It includes
  Arbitrum One (general-purpose rollup secured by Ethereum), Arbitrum Nova (AnyTrust
  chain for high-throughput, low-cost apps), Arbitrum Sepolia (testnet), and Arbitrum
  Orbit (settlement framework for custom L2 / L3 chains). Developers interact via
  standard Ethereum JSON-RPC, the Stylus SDK for Rust / C / C++ smart contracts, the
  Arbitrum SDK for cross-chain messaging and bridging, and the Arbitrum Bridge for
  canonical asset transfer between Ethereum and Arbitrum chains.
image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg
tags:
  - Layer 2
  - Ethereum
  - Rollup
  - JSON-RPC
  - Stylus
  - Nitro
  - Orbit
  - Bridge
created: '2026-05-23'
modified: '2026-05-23'
specificationVersion: '0.19'
apis:
  - aid: arbitrum:one-rpc
    name: Arbitrum One JSON-RPC
    description: >-
      Public Ethereum JSON-RPC endpoint for Arbitrum One mainnet (chain ID 42161),
      the flagship optimistic rollup secured directly by Ethereum L1. Supports
      standard eth_* methods plus Arbitrum-specific precompiles for L1 messaging,
      retryable tickets, and gas accounting. Public endpoint does not support
      WebSockets — production teams use Alchemy, QuickNode, Infura, Chainstack, or
      self-hosted Nitro nodes.
    humanURL: https://docs.arbitrum.io/build-decentralized-apps/reference/node-providers
    baseURL: https://arb1.arbitrum.io/rpc
    tags:
      - JSON-RPC
      - Mainnet
      - Arbitrum One
    properties:
      - type: Documentation
        url: https://docs.arbitrum.io/build-decentralized-apps/reference/node-providers
  - aid: arbitrum:nova-rpc
    name: Arbitrum Nova JSON-RPC
    description: >-
      Public Ethereum JSON-RPC endpoint for Arbitrum Nova (chain ID 42170), an
      AnyTrust chain with a Data Availability Committee for high-throughput, low-cost
      transactions suited to gaming and social apps.
    humanURL: https://docs.arbitrum.io/build-decentralized-apps/reference/node-providers
    baseURL: https://nova.arbitrum.io/rpc
    tags:
      - JSON-RPC
      - Nova
      - AnyTrust
    properties:
      - type: Documentation
        url: https://docs.arbitrum.io/build-decentralized-apps/reference/node-providers
  - aid: arbitrum:sepolia-rpc
    name: Arbitrum Sepolia JSON-RPC
    description: >-
      Public Ethereum JSON-RPC endpoint for the Arbitrum Sepolia testnet (chain ID
      421614).
    humanURL: https://docs.arbitrum.io/build-decentralized-apps/reference/node-providers
    baseURL: https://sepolia-rollup.arbitrum.io/rpc
    tags:
      - JSON-RPC
      - Testnet
      - Sepolia
    properties:
      - type: Documentation
        url: https://docs.arbitrum.io/build-decentralized-apps/reference/node-providers
  - aid: arbitrum:bridge
    name: Arbitrum Bridge
    description: >-
      Canonical cross-chain bridge for transferring ETH and ERC-20 tokens between
      Ethereum L1, Arbitrum One, Arbitrum Nova, and connected Orbit chains. Bridge
      operations and underlying token-bridge contracts are open-source.
    humanURL: https://bridge.arbitrum.io
    baseURL: https://bridge.arbitrum.io
    tags:
      - Bridge
      - Cross-Chain
      - Canonical
    properties:
      - type: Documentation
        url: https://docs.arbitrum.io/arbitrum-bridge/quickstart
      - type: App
        url: https://bridge.arbitrum.io
      - type: Repository
        url: https://github.com/OffchainLabs/token-bridge-contracts
  - aid: arbitrum:sdk
    name: Arbitrum SDK
    description: >-
      Official TypeScript SDK (@arbitrum/sdk) for cross-chain interactions — building
      L1-to-L2 and L2-to-L1 messages, deposit and withdrawal flows, retryable
      tickets, and gas estimation for Arbitrum chains.
    humanURL: https://docs.arbitrum.io/sdk
    baseURL: https://github.com/OffchainLabs/arbitrum-sdk
    tags:
      - SDK
      - TypeScript
      - Cross-Chain
    properties:
      - type: Documentation
        url: https://docs.arbitrum.io/sdk
      - type: Repository
        url: https://github.com/OffchainLabs/arbitrum-sdk
  - aid: arbitrum:stylus-sdk
    name: Stylus SDK (Rust)
    description: >-
      Stylus lets developers write EVM-compatible smart contracts in Rust, C, and
      C++ that compile to WASM and run alongside Solidity contracts. The Rust SDK
      provides storage primitives, host I/O, and macros for ABI compatibility.
    humanURL: https://docs.arbitrum.io/stylus/gentle-introduction
    baseURL: https://github.com/OffchainLabs/stylus-sdk-rs
    tags:
      - Stylus
      - SDK
      - Rust
      - WASM
    properties:
      - type: Documentation
        url: https://docs.arbitrum.io/stylus/gentle-introduction
      - type: Repository
        url: https://github.com/OffchainLabs/stylus-sdk-rs
  - aid: arbitrum:nitro
    name: Arbitrum Nitro
    description: >-
      Open-source Nitro node implementation that runs Arbitrum One, Nova, and Orbit
      chains. Includes the sequencer, batch poster, validator, and a fork of go-
      ethereum patched for Arbitrum's execution layer.
    humanURL: https://docs.arbitrum.io/how-arbitrum-works/inside-arbitrum-nitro
    baseURL: https://github.com/OffchainLabs/nitro
    tags:
      - Node
      - Nitro
      - Sequencer
      - Validator
    properties:
      - type: Documentation
        url: https://docs.arbitrum.io/how-arbitrum-works/inside-arbitrum-nitro
      - type: Repository
        url: https://github.com/OffchainLabs/nitro
  - aid: arbitrum:orbit-sdk
    name: Arbitrum Orbit SDK
    description: >-
      TypeScript SDK and tooling for deploying and operating Orbit chains — custom
      Arbitrum L2 / L3 chains that settle to Arbitrum One, Nova, or other Orbit
      chains.
    humanURL: https://docs.arbitrum.io/launch-orbit-chain/orbit-gentle-introduction
    baseURL: https://github.com/OffchainLabs/arbitrum-orbit-sdk
    tags:
      - Orbit
      - SDK
      - Appchains
    properties:
      - type: Documentation
        url: https://docs.arbitrum.io/launch-orbit-chain/orbit-gentle-introduction
      - type: Repository
        url: https://github.com/OffchainLabs/arbitrum-orbit-sdk
  - aid: arbitrum:arbiscan-explorer
    name: Arbiscan Block Explorer
    description: >-
      Etherscan-family block explorer for Arbitrum One, Nova, and Sepolia with a
      public REST API for contracts, transactions, and addresses.
    humanURL: https://arbiscan.io
    baseURL: https://api.arbiscan.io/api
    tags:
      - Block Explorer
      - Arbiscan
      - API
    properties:
      - type: Documentation
        url: https://docs.arbiscan.io
      - type: Website
        url: https://arbiscan.io
common:
  - type: Website
    url: https://arbitrum.io
  - type: Foundation
    url: https://arbitrum.foundation
  - type: Documentation
    url: https://docs.arbitrum.io
  - type: GitHub
    url: https://github.com/OffchainLabs
  - type: Portal
    url: https://portal.arbitrum.io
  - type: Bridge
    url: https://bridge.arbitrum.io
  - type: Status
    url: https://status.arbitrum.io
  - type: Twitter
    url: https://x.com/arbitrum
  - type: Discord
    url: https://discord.gg/arbitrum
  - type: Blog
    url: https://medium.com/offchainlabs
integrations:
  - name: Ethereum
  - name: Alchemy
  - name: QuickNode
  - name: Infura
  - name: Chainstack
  - name: The Graph
  - name: Etherscan
maintainers:
  - FN: Kin Lane
    email: [email protected]