Sonic RPC Endpoint

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

Sonic is the rebranded and upgraded version of Fantom, launched in late 2024 with a new high-performance EVM execution layer (Sonic Engine). It offers sub-second finality and 10,000+ TPS targets, with an aggressive fee-sharing model that returns 90% of gas fees to dApp developers.

About Sonic

Sonic's core innovation is its custom EVM-compatible execution layer that maintains Solidity bytecode compatibility while achieving dramatically higher throughput than typical EVM chains. The S token is the native asset (1:1 with FTM via migration).

Sonic also introduced "FeeM" — fee monetization — where 90% of transaction fees paid in interaction with a dApp are returned to that dApp's developers. This creates strong incentive alignment between the chain and builders.

Common Use Cases on Sonic

• DeFi with sub-second finality
• GameFi and high-frequency dApps
• Developer revenue-sharing applications (FeeM)
• AI inference settlement (Sonic Labs has been positioning here)
• Migration target for existing Fantom dApps

Sonic Ecosystem

All major Fantom DeFi protocols (SpookySwap, Beethoven X, Equalizer) migrated to Sonic. New projects building specifically for the FeeM model. Sonic Labs has incentive programs running for builders.

HTTP Endpoint

WebSocket Endpoint

Quick Start: Connect to Sonic

cURL

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

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

viem

import { createPublicClient, http } from "viem";

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

const blockNumber = await client.getBlockNumber();

web3.py

from web3 import Web3

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

Add Sonic to MetaMask

Bridging to Sonic

Sonic Gateway (https://gateway.soniclabs.com) for Ethereum ↔ Sonic. Stargate, LayerZero for general cross-chain. Fantom Opera migration handled separately.

Features of SwiftNodes for Sonic

• 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 Sonic

Rate Limits

Frequently Asked Questions: Sonic