Free Arbitrum One RPC (ETH)

Discover Arbitrum One, a Layer 2 scaling solution for Ethereum. Build faster, low-cost decentralized applications using the RPC gateway.

99.99%

24/7

FREE

RPC Gateway

Connect to Arbitrum One RPC

Access reliable, enterprise-grade RPC endpoints that power your dApp with ultra-low latency and 99.9% uptime.

Connect to Arbitrum One Gateway

Make your first RPC call on Arbitrum One's Blockchain Gateway.

Mainnet

Explorer

JSON-RPC

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

Sepolia

Testnet

Explorer

JSON-RPC

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

* Rate limit enabled - perfect for testing and development. For production, we recommend to Upgrade.

Ready for production?

Get 200 requests/second, priority support and advanced blockchain features.

Global Load Balancer

Route to nearest node

Batch RPC Calls

Multiple requests at once

Archive Nodes

Historical blockchain data

Debug & Trace

Advanced debugging

Advanced Analytics

Usage & performance

Bring Your Own RPC

Custom RPC gateways

Upgrade

Get Free API Key

Increase your limit and access all Arbitrum One features in Tatum Development Platform.

Get API Key How to authenticate

Estimate Gas on Arbitrum One

Calculate the optimal gas fee for any transaction on Arbitrum One.

Smart Contract Tools on Arbitrum One

Deploy, create, and interact with smart contracts on Arbitrum One.

Accessible to Everyone

No signup. No paywalls. Just RPC that works. Great ideas come from everywhere.

Our Mission

With love by Tatum

Blockchain Data

Indexed Arbitrum One Data Insights

Complete on-chain data access for Arbitrum One. Query wallets, tokens, NFTs, and transaction history with lightning-fast APIs - no need to run your own nodes.

Get Wallet Portfolio

Fetch all token balances for a wallet on Arbitrum One.

Get Token Exchange Rates

Check exchange rates for tokens and fiat on Arbitrum One.

1 ETH=? USD

Check Arbitrum One Malicious Address

Verify if an address on Arbitrum One is flagged as malicious.

0x1a2b...3c4d

Flagged

NFT API on Arbitrum One

Query collections, get metadata, check ownership, and track balances on Arbitrum One.

Get Token Information

Fetch detailed information about a token on Arbitrum One.

Get Arbitrum One Wallet Transactions

Retrieve all Arbitrum One transactions for a wallet, including internal transfers.

Web3 Name Service on Arbitrum One

Resolve Web3 names to blockchain addresses instantly with a unified API.

Blockchain Notifications

Real-time Arbitrum One Alerts

Real-time webhooks for Arbitrum One events. Stop polling the blockchain - get instant alerts for transactions, smart contract events, and wallet activities.

Real-time Alerts for Arbitrum One

Receive instant webhooks for any event on Arbitrum One.

nowNew token transfer detected

200 OK

5s agoIncoming USDT transaction

200 OK

10s agoSmart contract executed

200 OK

Notification Types on Arbitrum One

Discover incoming and outgoing transaction events for Arbitrum One addresses.

About Arbitrum One

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.

FAQ

Frequently Asked Questions

Everything you need to know about Arbitrum One RPC endpoints

What is Arbitrum One RPC?

Arbitrum One RPC (Remote Procedure Call) is an interface that allows developers to interact with the Arbitrum One blockchain. It enables you to read data, send transactions, and deploy smart contracts programmatically using standard JSON-RPC methods.

How do I connect to Arbitrum One using these RPC endpoints?

Simply copy the RPC endpoint URL from above and configure it in your Web3 library (ethers.js, web3.js), wallet (MetaMask, Trust Wallet), or development tool (Hardhat, Truffle). The endpoint works immediately with no registration required for the free tier.

What are the rate limits for free Arbitrum One RPC?

Free tier RPC endpoints are limited to 5 requests per minute. This is perfect for testing and development. For production applications, we recommend upgrading to Tatum Premium which offers 200 requests per second with no daily limits.

When should I upgrade to Premium?

Consider upgrading to Premium when you're moving to production, need higher rate limits (200 req/sec), require 99.9% uptime SLA, want access to archive nodes for historical data, or need advanced features like batch RPC calls, debug/trace methods, and priority support.

Is Arbitrum One RPC free forever?

Yes! Our free tier Arbitrum One RPC endpoints are free forever with 5 requests per minute. This tier is perfect for learning, testing, and small projects. There are no hidden fees or time limits on the free tier.

What's the difference between mainnet and testnet?

Mainnet is the live Arbitrum One blockchain where real transactions occur with real assets. Testnet is a separate network used for testing and development with free test tokens. Always test your dApp on testnet before deploying to mainnet.

Can I use these endpoints in production?

Free tier endpoints can be used in production for low-traffic applications (under 5 req/min). For production apps with higher traffic, we strongly recommend Tatum Premium for guaranteed uptime, faster rate limits, and enterprise SLA.