Soneium RPC Endpoint

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

Soneium is an Ethereum Layer 2 built on the OP Stack and part of the Optimism Superchain, developed by Sony Block Solutions Labs, a joint venture between Sony Group and Startale. It uses ETH for gas and inherits security from Ethereum through optimistic rollup settlement.

About Soneium

Soneium mainnet launched on January 14, 2025. As an OP Stack rollup, it batches transactions to Ethereum L1, where they settle under the optimistic rollup model with a challenge period for full withdrawals. Soft confirmations occur in roughly 2 seconds, while hard finality follows Ethereum settlement.

Soneium is fully EVM-equivalent, so Solidity contracts and standard Ethereum tooling deploy unchanged, and ETH is the native gas token. As of mainnet there is no separate Soneium gas token. Astar Network is a key partner, and the chain targets entertainment, gaming, and consumer applications drawing on Sony's reach.

Common Use Cases on Soneium

• Entertainment and consumer apps
• Gaming and NFTs
• EVM DeFi (DEXes, lending, stablecoins)
• Low-cost Ethereum-settled transactions
• Superchain interoperability

Soneium Ecosystem

Hosts Aave, Sake Finance, the Sonova NFT marketplace, and Astar Network integrations, among 170+ projects on the Superchain.

HTTP Endpoint

WebSocket Endpoint

Quick Start: Connect to Soneium

cURL

curl -X POST https://rpc.swiftnodes.io/rpc/soneium?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/soneium?key=YOUR_API_KEY"
);

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

viem

import { createPublicClient, http } from "viem";

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

const blockNumber = await client.getBlockNumber();

web3.py

from web3 import Web3

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

Add Soneium to MetaMask

Bridging to Soneium

Uses the canonical OP Stack bridge to Ethereum, plus third-party bridges such as Stargate (LayerZero) and Orbiter Finance.

Features of SwiftNodes for Soneium

• 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 Soneium

Rate Limits

Frequently Asked Questions: Soneium