Unichain RPC Endpoint

Fast, flat-rate Unichain RPC node provider — free tier, no KYC, HTTP & WebSocket.

Unichain is an Ethereum Layer 2 rollup built by Uniswap Labs on the OP Stack and part of the Optimism Superchain. It is purpose-built for DeFi, with fast block times and ETH as its native gas token.

About Unichain

Unichain launched its mainnet in early 2025, developed by Uniswap Labs as a DeFi-focused L2 on Optimism's OP Stack. It is an optimistic rollup that settles to Ethereum and joins the Superchain's shared interoperability standards, launching with around one-second block times and exploring sub-second confirmation through TEE-based block building.

ETH is the native gas token, and the chain is engineered to favor low-MEV transaction ordering and efficient swap routing. As part of the Superchain it supports interoperable ERC20s, and its primary activity is centered on Uniswap v4 liquidity. Developers use standard OP Stack and Ethereum tooling.

Common Use Cases on Unichain

• DeFi and AMM trading (Uniswap v4)
• Low-MEV swap execution
• Cross-chain liquidity via the Superchain
• Stablecoin transfers
• General EVM dApps

Unichain Ecosystem

Unichain is centered on Uniswap v4 deployments and DeFi liquidity, and as part of the Optimism Superchain it interoperates with other OP Stack chains.

HTTP Endpoint

WebSocket Endpoint

Quick Start: Connect to Unichain

cURL

curl -X POST https://rpc.swiftnodes.io/rpc/unichain?key=YOUR_API_KEY \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}'

ethers.js

import { JsonRpcProvider } from "ethers";

const provider = new JsonRpcProvider(
  "https://rpc.swiftnodes.io/rpc/unichain?key=YOUR_API_KEY"
);

const blockNumber = await provider.getBlockNumber();
console.log("Unichain block:", blockNumber);

viem

import { createPublicClient, http } from "viem";

const client = createPublicClient({
  transport: http("https://rpc.swiftnodes.io/rpc/unichain?key=YOUR_API_KEY"),
});

const blockNumber = await client.getBlockNumber();

web3.py

from web3 import Web3

w3 = Web3(Web3.HTTPProvider("https://rpc.swiftnodes.io/rpc/unichain?key=YOUR_API_KEY"))
print("Unichain block:", w3.eth.block_number)

Add Unichain to MetaMask

Bridging to Unichain

The OP Stack canonical bridge moves assets between Ethereum and Unichain, and fast third-party bridges such as Across and aggregators like Bungee/Jumper offer quicker transfers.

Features of SwiftNodes for Unichain

• Multiple load-balanced upstream nodes for high availability
• Health-checked every 60 seconds with automatic failover
• Free tier available — no credit card or KYC required
• Flat-rate monthly pricing with no per-request fees
• HTTP and WebSocket support
• One API key works across all 75+ supported chains, including Unichain

Rate Limits

Frequently Asked Questions: Unichain