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Arbitrum

Arbitrum One JSON-RPC

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.

Documentation Provider Profile APIs.io OpenAPI GitHub

Arbitrum One JSON-RPC is one of 10 APIs that Arbitrum publishes on the APIs.io network, described by an AsyncAPI event-driven specification.

Tagged areas include JSON-RPC, Mainnet, and Arbitrum One. The published artifact set on APIs.io includes API documentation and an AsyncAPI specification.

Requests are made against the base URL https://arb1.arbitrum.io/rpc.

Metadata

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Specification
OpenAPI
Base URL
https://arb1.arbitrum.io/rpc

Specification

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Source

arbitrum-asyncapi.yml Raw ↑

Other APIs Arbitrum publishes across the network.

Arbitrum Nova JSON-RPC
AE Profile APIs.io
Arbitrum Sepolia JSON-RPC
AE Profile APIs.io
Arbitrum Bridge
AE Profile APIs.io
Arbitrum SDK
AE Profile APIs.io
Stylus SDK (Rust)
AE Profile APIs.io
Arbitrum Nitro
AE Profile APIs.io
Arbitrum Orbit SDK
AE Profile APIs.io
Arbiscan Block Explorer
AE Profile APIs.io
Arbitrum JSON-RPC API
AE Profile APIs.io
#JSON-RPC#Mainnet#Arbitrum One
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API Details
ID
arbitrum:one-rpc
Base URL
https://arb1.arbitrum.io/rpc
Docs
https://docs.arbitrum.io/build-decentralized-apps/reference/node-providers
Provider
Arbitrum
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This is an independent, third-party profile of Arbitrum One JSON-RPC, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

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