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 - type: LLMsTxt url: https://docs.arbitrum.io/llms.txt integrations: - name: Ethereum - name: Alchemy - name: QuickNode - name: Infura - name: Chainstack - name: The Graph - name: Etherscan maintainers: - FN: Kin Lane email: kin@apievangelist.com