Offchain Labs

Arbitrum One JSON-RPC

Public Ethereum JSON-RPC endpoint for Arbitrum One (chain ID 42161), the flagship Arbitrum Layer 2 rollup. Supports the standard Ethereum JSON-RPC method set plus Arbitrum-specific precompiles and the NodeInterface.

GitHub

Documentation

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Documentation
https://docs.arbitrum.io/build-decentralized-apps/reference/rpc-methods

Other Resources

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APIsJSON
https://raw.githubusercontent.com/api-evangelist/offchain-labs/refs/heads/main/apis.yml

API entry from apis.yml

apis.yml Raw ↑ 
name: Arbitrum One JSON-RPC
description: Public Ethereum JSON-RPC endpoint for Arbitrum One (chain ID 42161), the flagship Arbitrum
  Layer 2 rollup. Supports the standard Ethereum JSON-RPC method set plus Arbitrum-specific precompiles
  and the NodeInterface.
humanURL: https://docs.arbitrum.io/build-decentralized-apps/reference/node-providers
baseURL: https://arb1.arbitrum.io/rpc
properties:
- type: Documentation
  url: https://docs.arbitrum.io/build-decentralized-apps/reference/rpc-methods