Fantom RPC Endpoint

Flat-rate Fantom RPC provider and Fantom RPC node access: free tier, no KYC, HTTP & WebSocket. Fantom mainnet chain ID 250.

Fantom Opera is the original Fantom layer 1, a proof-of-stake chain using the DAG-based Lachesis aBFT consensus and FTM for gas. Its ecosystem has moved to Sonic, the successor network launched by Sonic Labs in December 2024.

About Fantom

Opera's genesis block was produced in December 2019. After Sonic launched, validators, liquidity and most apps migrated there, and FTM can be swapped 1:1 for Sonic's S token. Sonic Labs announced in April 2026 that Opera would be retired on June 30, 2026, but on June 23, 2026 new leadership reversed that, keeping Opera live until at least the end of 2026 with the FTM to S bridge funded.

Opera is EVM-compatible and works with standard Ethereum tooling. New development targets Sonic, so Opera RPC access mainly serves historical data, asset migration and legacy contracts; Sonic Labs has said Opera chain history will be preserved.

Common Use Cases on Fantom

• Migrating FTM to S on Sonic
• Querying historical Opera data
• Maintaining legacy contracts and indexers
• Withdrawing from legacy DeFi positions

Fantom Mainnet RPC URL (HTTP)

Fantom WebSocket RPC URL

Quick Start: Connect to Fantom

cURL

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

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

viem

import { createPublicClient, http } from "viem";

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

const blockNumber = await client.getBlockNumber();

web3.py

from web3 import Web3

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

Add Fantom to MetaMask

Features of SwiftNodes for Fantom

• 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 Fantom

Rate Limits

Frequently Asked Questions: Fantom

Fantom RPC methods

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

• eth_blockNumbersupported
• eth_chainIdsupported
• eth_getBalancesupported
• eth_getBlockByNumbersupported
• eth_getTransactionByHashsupported
• eth_getTransactionReceiptsupported
• eth_callsupported
• eth_estimateGassupported
• eth_gasPricesupported
• eth_maxPriorityFeePerGassupported
• eth_sendRawTransactionsupported
• eth_getTransactionCountsupported
• eth_getCodesupported
• eth_subscribesupported
• eth_getLogssupported
• eth_getBlockReceiptssupported
• eth_feeHistorysupported
• eth_getProofsupported
• eth_createAccessListsupported
• debug_traceCallsupported
• trace_blocksupported
• trace_transactionsupported

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