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.

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

RPC Gateway for Optimism blockchain

Optimism RPC networks

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💎

Optimism Mainnet

🕵️ Explorer

↳ JSON-RPC

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

🔍 Status

✨

Optimism Testnet

🕵️ Explorer

↳ JSON-RPC

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

🔍 Status

Connect to Optimism and Fetch the Latest Block

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

Retrieve Optimism Node Status or Client Version via RPC

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

Test Optimism RPC Methods in Postman

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

How to use the Optimism 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 Optimism collection
Configure your environment: Update the gateway-api-key variable in the Tatum Gateway environment
Start testing: Execute any Optimism RPC method and see real-time responses

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