Soneium RPC Endpoint

Flat-rate Soneium RPC provider and Soneium RPC node access: free tier, no KYC, HTTP & WebSocket. Soneium mainnet chain ID 1868.

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.

Soneium Mainnet RPC URL (HTTP)

Soneium WebSocket RPC URL

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

• 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 Soneium

Rate Limits

Frequently Asked Questions: Soneium

Soneium 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.

Related L2 & rollup chains

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