Free Optimism RPC (ETH)

Explore Optimism, a Layer 2 scaling solution for Ethereum. Build fast and low-cost decentralized applications using its RPC gateway.

99.99%

24/7

FREE

RPC Gateway

Connect to Optimism RPC

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

Connect to Optimism Gateway

Make your first RPC call on Optimism's Blockchain Gateway.

Mainnet

Explorer

JSON-RPC

https://optimism-mainnet.gateway.tatum.io

Testnet

Explorer

JSON-RPC

https://optimism-testnet.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 Optimism features in Tatum Development Platform.

Get API Key How to authenticate

Estimate Gas on Optimism

Calculate the optimal gas fee for any transaction on Optimism.

Smart Contract Tools on Optimism

Deploy, create, and interact with smart contracts on Optimism.

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 Optimism Data Insights

Complete on-chain data access for Optimism. 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 Optimism.

Get Token Exchange Rates

Check exchange rates for tokens and fiat on Optimism.

1 ETH=? USD

Check Optimism Malicious Address

Verify if an address on Optimism is flagged as malicious.

0x1a2b...3c4d

Flagged

NFT API on Optimism

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

Get Token Information

Fetch detailed information about a token on Optimism.

Get Optimism Wallet Transactions

Retrieve all Optimism transactions for a wallet, including internal transfers.

Blockchain Notifications

Real-time Optimism Alerts

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

Real-time Alerts for Optimism

Receive instant webhooks for any event on Optimism.

nowNew token transfer detected

200 OK

5s agoIncoming USDT transaction

200 OK

10s agoSmart contract executed

200 OK

Notification Types on Optimism

Discover incoming and outgoing transaction events for Optimism addresses.

About Optimism

The Optimism RPC documentation provides developers with a comprehensive guide to interact with Optimism, a Layer 2 scaling solution for Ethereum. Optimism uses optimistic rollups to achieve low-cost and fast transactions while maintaining the security of the Ethereum mainnet. The documentation includes key API endpoints for querying blockchain data, managing transactions, and interacting with smart contracts. Developers can build scalable decentralized applications (dApps) with enhanced performance and lower transaction costs using Optimism’s RPC gateway.

FAQ

Frequently Asked Questions

Everything you need to know about Optimism RPC endpoints

What is Optimism RPC?

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

How do I connect to Optimism 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 Optimism 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 Optimism RPC free forever?

Yes! Our free tier Optimism 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 Optimism 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.