Optimism RPC

With QuickNode, you get access to our global Optimism network which always routes your API requests to the nearest available location, ensuring low latency and the fastest speeds.

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What is Optimism?

Optimism is a Layer 2 scaling solution for Ethereum that uses optimistic rollup technology to increase throughput while maintaining Ethereum's security. Optimism processes transactions off-chain and posts compressed transaction data to Ethereum mainnet, inheriting its security guarantees through a 7-day fraud proof window.

Optimism implements the Optimism Virtual Machine (OVM), which is EVM-equivalent at the bytecode level. The network uses sequencers to order transactions and produce blocks with 2-second block times. The network supports cross-chain messaging through its native bridge contracts, allowing assets and data to move between L1 and L2. Optimism uses ETH for gas fees and implements the same account model and transaction types as Ethereum.

Interacting with Optimism

The Optimism JSON-RPC API extends the standard Ethereum JSON-RPC interface with L2-specific functionality. Since Optimism maintains EVM equivalence, developers can use existing Ethereum tools and libraries without modification.

With this API, you can:

Execute all standard Ethereum JSON-RPC methods (eth_call, eth_sendTransaction, eth_getBalance)
Access Optimism-specific methods for L2 operations and gas estimation
Query L1 to L2 message status and cross-chain transaction receipts
Retrieve L2 block and transaction data including L1 batch information
Subscribe to real-time events via WebSocket connections

You can access the API by:

Running a local Optimism node (op-node and op-geth)
Using a hosted provider such as a QuickNode Optimism endpoint, which provides instant access to mainnet and testnet with archive data support

Supported Networks

QuickNode provides access to the following Optimism networks:

Mainnet

Type:Production

Chain ID:

HTTP:

WSS:

Archive:Yes

Pruning:None

Sepolia

Type:Testnet

Chain ID:

11155420

HTTP:

WSS:

Archive:Yes

Pruning:None

Network

Type

Chain ID

HTTP

WSS

QuickStart

Get started with Optimism quickly. Follow our step-by-step quickstart to set up your endpoint and make your first API request.

Provider Endpoints

Learn how to configure and manage your Optimism endpoints for optimal performance and reliability.

API Overview

Explore supported APIs, networks, QuickNode products, and enhanced API features for building powerful applications.

Marketplace

Discover and integrate powerful add-ons and tools from the QuickNode Marketplace to enhance your web3 applications.

Endpoint Security

Secure your endpoints with authentication, whitelisting, and best security practices.

Error Codes

Understand common error codes and troubleshooting steps for Optimism API requests.