Arbitrum One’s RPC documentation serves as a comprehensive resource for developers looking to integrate with this Layer 2 scaling solution for Ethereum. The documentation outlines the key API endpoints necessary for interacting with the Arbitrum chain, querying blockchain data, managing smart contracts, and submitting transactions. Built on optimistic rollups, Arbitrum One enhances Ethereum’s scalability by offering faster transactions and lower fees. This guide provides examples and best practices to streamline dApp development on Arbitrum One while leveraging Ethereum’s security.

– Related: 📚 Supported Blockchains • 🌐 RPC Nodes → Arbitrum One • 🔗 Official Arbitrum One Website

RPC Gateway for Arbitrum One blockchain

Arbitrum One RPC networks

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💎

Arbitrum One Mainnet

🕵️ Explorer

↳ JSON-RPC

https://arbitrum-one-mainnet.gateway.tatum.io

🔍 Status

✨

Arbitrum One Sepolia

🕵️ Explorer

↳ JSON-RPC

https://arbitrum-one-sepolia.gateway.tatum.io

🔍 Status

Connect to Arbitrum One and Fetch the Latest Block

This widget lets you instantly query the latest block height (or equivalent) for Arbitrum One using a chain-specific RPC method like eth_blockNumber, getblockcount, or getBlockHeight. Useful for connectivity checks, uptime monitoring, or API testing.

Retrieve Arbitrum One Node Status or Client Version via RPC

Use this pre-configured request to get version or status information for your connected Arbitrum One node. Whether it's web3_clientVersion, getblockchaininfo, or chain-specific endpoints, the method is optimized for each supported blockchain.

Test Arbitrum One RPC Methods in Postman

Explore and test Arbitrum One blockchain methods instantly using our pre-configured Postman collection. Perfect for developers who want to experiment with Arbitrum One RPC endpoints, validate API responses, or integrate Arbitrum One into their applications.

How to use the Arbitrum One Postman Collection

Get your API key: Visit Tatum Dashboard to obtain your free API key
Import the collection: Click the "Run in Postman" button below to import the Arbitrum One collection
Configure your environment: Update the gateway-api-key variable in the Tatum Gateway environment
Start testing: Execute any Arbitrum One RPC method and see real-time responses

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