Optimism RPC Endpoints & API | OnFinality

Use OnFinality for Optimism RPC endpoints, Optimism API access, and reliable Ethereum L2 infrastructure. OnFinality supports teams looking for dependable Optimism RPC providers, low-cost node hosting options, and scalable endpoints for production dApps.

What is Optimism?

Optimism is a fast, stable, and scalable L2 blockchain built by Ethereum developers, for Ethereum developers. Built as a minimal extension to existing Ethereum software, Optimism’s EVM-equivalent architecture scales your Ethereum apps without surprises. If it works on Ethereum, it works on Optimism at a fraction of the cost.

Optimism pioneered the OP Stack, an open-source framework powering an ecosystem of Layer 2 chains called the Superchain. The Superchain project seeks to maximize interoperability and composability between different chains using the OP Stack, and integrate siloed L2s into a single, cohesive layer.

Why Use an Optimism RPC Provider?

An Optimism RPC endpoint is the gateway for applications to read blockchain data, submit transactions, and connect backend services to Optimism. Whether you are building a wallet, DeFi product, analytics tool, game, bot, or backend service, a reliable RPC provider ensures stable access without the overhead of running your own node.

Public RPC endpoints are often rate-limited and lack observability. For production workloads, authenticated endpoints from a managed provider like OnFinality offer clearer usage limits, request analytics, and a path to higher capacity.

Optimism RPC on OnFinality

OnFinality provides managed Optimism RPC API endpoints with support for:

• EVM JSON-RPC – Standard Ethereum-compatible methods.
• HTTP and WebSocket – Choose the transport that fits your application.
• Archive and trace access – Query historical state and debug transactions where supported.
• Observability – Monitor request usage, errors, and limits through the OnFinality dashboard.

OnFinality endpoints are suitable for production dApps, wallets, DeFi products, analytics tools, games, bots, and backend services.

How to Connect to Optimism with OnFinality

1. Create or sign in to an OnFinality account.
2. Choose Optimism from the supported networks list.
3. Create an API endpoint (or deploy a dedicated node if needed).
4. Test the endpoint with the example method eth_blockNumber.
5. Monitor request usage, errors, and limits before moving critical traffic.

Optimism RPC vs Public RPC

Public endpoints are useful for quick tests, but authenticated OnFinality endpoints are designed for teams that need clearer limits, request visibility, and a path to higher-capacity infrastructure.