# Networks and Public RPC Endpoints

# Optimism (mainnet)

Point and deploy

We recently removed our whitelist! This means that anyone can deploy onto Optimism. However, if you want support getting live on Optimism, or if you want some PR hype you can apply here (opens new window).

Parameter Value
Network Name Optimism
Description Mainnet
Chain ID 10
Explorer https://optimistic.etherscan.io
HTTP Endpoint https://mainnet.optimism.io Not for production systems. See the list of available RPC endpoints below
WebSocket Endpoint wss://ws-mainnet.optimism.io
L1 Contract Addresses link (opens new window)
L2 Contract Addresses link (opens new window)

# RPC endpoints

Please set up a private RPC endpoint with any of the following providers:

The public endpoints are provided as a convenience in order to make it easier to develop dApps on Optimism. These public endpoints are strictly rate limited and should not be used in production systems.

# Optimism Kovan (testnet)

Purpose

This is our test network.

Parameter Value
Network Name Optimism Kovan
Description Testnet (public)
Chain ID 69
Explorer https://kovan-optimistic.etherscan.io
HTTP Endpoint https://kovan.optimism.io If you are going to be sending a lot of requests please set up your own private RPC endpoint
WebSocket Endpoint wss://ws-kovan.optimism.io
L1 Contract Addresses link (opens new window)
L2 Contract Addresses link (opens new window)

# RPC endpoints

Please set up a private RPC endpoint with any of the following providers:

# Development Node (local)

Purpose

This is the information for a local development node.

Parameter Value
Currency Ether (ETH)
Chain ID 420
HTTP Endpoint https://localhost:8545
HTTP Endpoint for L1 https://localhost:9545
Mnemonic for rich account test test test test test test test test test test test junk