Optimism RPC Endpoints

Mainnet

Sepolia

Chain ID
Family: EVM
Native token: ETH
Block time: 2 s

HTTPS

https://api-optimism-mainnet-archive.n.dwellir.com/<your-api-key>

WSS

wss://api-optimism-mainnet-archive.n.dwellir.com/<your-api-key>

Quick Start

BASH

curl -sS -X POST https://api-optimism-mainnet-archive.n.dwellir.com/<your-api-key> \
  -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}'

JAVASCRIPT

import { JsonRpcProvider } from 'ethers';

const provider = new JsonRpcProvider('https://api-optimism-mainnet-archive.n.dwellir.com/<your-api-key>');
const latest = await provider.getBlockNumber();
console.log('block', latest);

PYTHON

import requests

url = 'https://api-optimism-mainnet-archive.n.dwellir.com/<your-api-key>'
payload = { 'jsonrpc': '2.0', 'id': 1, 'method': 'eth_blockNumber', 'params': [] }
resp = requests.post(url, json=payload)
print(resp.json())

package main

import (
  "bytes"
  "fmt"
  "net/http"
  "io/ioutil"
)

func main() {
  url := "https://api-optimism-mainnet-archive.n.dwellir.com/<your-api-key>"
  payload := []byte("{\"jsonrpc\":\"2.0\",\"id\":1,\"method\":\"eth_blockNumber\",\"params\":[]}")
  resp, err := http.Post(url, "application/json", bytes.NewBuffer(payload))
  if err != nil { panic(err) }
  defer resp.Body.Close()
  body, _ := ioutil.ReadAll(resp.Body)
  fmt.Println(string(body))
}

Optimism offers a low-cost and high-speed Ethereum Layer 2 (L2) blockchain solution, known as OP Mainnet. It is designed to scale Ethereum applications efficiently, maintaining compatibility with the Ethereum Virtual Machine (EVM). Optimism focuses on enhancing interoperability and composability between different chains through the Superchain project, utilizing the modular OP Stack. It aims to integrate various Layer 2 solutions into a unified layer, preventing ecosystem fragmentation.

Shared Node Pricing

How many calls do you make per month?

/ month

Growth

$299

/month

500 Responses /sec
Pay in Crypto
Dedicated Account Manager

CHOOSE GROWTH

Optimism Unlimited Node

Unmetered requests within your tier
Five tiers from 25 to 1,000 RPS
No API credits, no overages
Pay in Crypto
HTTP & Websocket APIs
Trace APIs
Debug APIs
Same endpoint URL and API key
Self-serve in the dashboard
Fixed monthly invoice

From $119/month

SEE UNLIMITED NODE PRICING

Optimism Dedicated Node Cluster

Unlimited RPS & Responses
HTTP & Websocket APIs
Trace APIs
Debug APIs
Pay in Crypto
Dedicated Account Manager
Tailored load balancing
Access to Engineering teams
Global data centers

$3366/month

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Developer Resources

FAQs

What is the Dwellir Optimism RPC URL?

Do you support WebSockets on Optimism?

Do you support archive data on Optimism?

How do I migrate from public Optimism RPC endpoints?

What are the Optimism Chain IDs and network details?

What SDKs can I use with Dwellir's Optimism endpoints?

How do Optimism withdrawals work and why is there a 7-day delay?

Optimism withdrawals require three steps: 1) Initiate withdrawal on L2 (instant), 2) Prove withdrawal on L1 after state root is published (~1-2 hours), 3) Finalize withdrawal on L1 after the 7-day challenge period. The 7-day delay allows anyone to challenge fraudulent state roots with a fault proof. During this period, your funds are locked but secure. For faster exits, use third-party bridges like Across, Hop, or Stargate that provide liquidity for immediate L1 funds (with fees). The Optimism SDK or viem can automate the three-step process.

What changed with Optimism's Fault Proof system and how does it affect my withdrawals?

With Fault Proof Mainnet, withdrawals are now proven against dispute games in the DisputeGameFactory contract instead of the legacy L2OutputOracle. Key changes: 1) Withdrawals proven against challenged outputs may be delayed an additional 3.5 days, 2) Withdrawals pending during the upgrade needed to be re-proven with a new 7-day wait, 3) The OptimismPortal contract now references DisputeGameFactory. Update your SDK/viem versions to handle these changes automatically. Valid outputs challenged maliciously can delay withdrawals up to 9 additional days, though this is rare and expensive for attackers.

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