Unichain RPC Endpoint

Flat-rate Unichain RPC provider and Unichain RPC node access: free tier, no KYC, HTTP & WebSocket. Unichain mainnet chain ID 130.

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.

Unichain Mainnet RPC URL (HTTP)

Unichain WebSocket RPC URL

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

• Load-balanced across multiple upstream nodes wherever a chain has more than one, with automatic failover
• Health-checked every 2 minutes 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

Unichain RPC methods

Measured weekly through this endpoint: what each method returns on Unichain, its limits, and an example request.

• eth_getLogssupported
• eth_getBlockReceiptssupported
• eth_feeHistorysupported
• eth_getProofsupported
• eth_createAccessListsupported
• debug_traceCallsupported
• trace_blocksupported
• trace_transactionsupported

Unichain guides from the blog

• Optimism RPC: The Chain That Became a TemplateOptimism (chain ID 10) is both a mature optimistic rollup — 2-second blocks, ETH gas, fault proofs live since 2024 — and the origin of the OP Stack, the codebase behind Base, Zora, opBNB, Unichain, and Soneium. The developer map: what the two-layer fee model means for gas estimation, why traces are uneven there, and how everything you learn on OP Mainnet carries across the family.
• Unichain RPC: Uniswap's L2 for DevelopersUnichain is Uniswap's own L2 — an OP Stack rollup on the Optimism Superchain, purpose-built for DeFi with ~1s blocks. It speaks standard eth_* JSON-RPC, so viem and ethers just work. Here's the chain ID, what carries over from Ethereum, and the Superchain and finality details that actually matter.

Related L2 & rollup chains

Explore RPC endpoints for other L2 & rollup networks on SwiftNodes: