How to Get an Optimism RPC Endpoint

Step-by-step guide to getting a fast, reliable Optimism RPC endpoint

Optimism (OP Mainnet) is a leading Ethereum L2 and the foundation of the Superchain ecosystem. With sub-dollar transaction costs and full EVM compatibility, it hosts major protocols like Velodrome, Synthetix, and Aave. Here's how to get a reliable OP Mainnet RPC endpoint.

Features

• Archive data access (all plans)

• Trace & Debug methods (Starter+)

• WebSocket support

• Multi-region (Frankfurt, New York, Singapore)

• Dedicated Nodes available

Step-by-Step: Get Your Optimism RPC Endpoint

1

Create a GetBlock Account

Go to GetBlock Dashboard and sign up. You can register with email or via Google/GitHub OAuth.

2

Create an Optimism Endpoint

Once logged in:

1. Click "Shared Nodes" in the left sidebar

2. Click "Create New Endpoint" or the "+" button

1. Select:

   • Protocol: Optimism

   • Network: Mainnet or Sepolia

   • API Interface: JSON-RPC or Websocket or GraphQL

   • Region: Frankfurt (EU)

   

2. Click "Create": Your endpoint URL will be generated immediately.

3

Copy Your Endpoint URL

Your endpoint URL looks like this:

https://go.getblock.io/a1b2c3d4e5f6789012345678abcdef01/

The long string after go.getblock.io/ is your access token — keep it private.

4

Test the Connection

cURL

curl -X POST https://go.getblock.io/<YOUR-ACCESS-TOKEN>/ \
  -H "Content-Type: application/json" \
  -d '{
  "jsonrpc":"2.0",
  "method":"eth_chainId",
  "params":[],
  "id":1
  }'

Response

Code Sample

ethers.js

import { JsonRpcProvider } from "ethers";
const provider = new JsonRpcProvider("https://go.getblock.io/<YOUR-ACCESS-TOKEN>/");
console.log("Block:", await provider.getBlockNumber());

Viem

What's Next?

• Full OP API Reference

• Dedicated Nodes

• Learn more about our pricing

Need Superchain infrastructure? Contact us.