Base RPC Endpoint

Flat-rate Base RPC provider and Base RPC node access: free tier, no KYC, HTTP & WebSocket. Base mainnet chain ID 8453.

Base is Coinbase's Ethereum Layer 2, built on the OP Stack and secured by Ethereum. Launched in August 2023, Base has become one of the fastest-growing L2s, driven by Coinbase's wallet integration and a friendly developer experience.

About Base

Base is an optimistic rollup that inherits security from Ethereum while offering ~2 second block times and gas fees typically 10-100x cheaper than mainnet. As an OP Stack chain, Base is part of the Optimism Superchain — sharing sequencer infrastructure, governance frameworks, and bridging primitives with Optimism, Mode, Zora, and other Superchain members.

Coinbase operates the current sequencer but has stated intent to decentralize over time. Base inherits Ethereum's security through fault proofs on the L1, with a 7-day challenge window for withdrawals (or instant withdrawals via third-party bridges).

Common Use Cases on Base

• Consumer-grade dApps with Coinbase wallet integration
• Onchain social (Farcaster, friend.tech-style apps)
• Memecoin and creator-economy tokens
• DeFi (Aerodrome, Uniswap V3, Aave)
• Cheap NFT minting and onchain games

Base Ecosystem

Aerodrome is the dominant DEX on Base. Other notable projects: Uniswap V3 (huge volume), Aave V3, Friend.tech (peak 2023), Farcaster (decentralized social), and a wave of memecoins. Base has consistently ranked top-3 L2s by daily transactions since launch.

Base Mainnet RPC URL (HTTP)

Base WebSocket RPC URL

Quick Start: Connect to Base

cURL

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

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

viem

import { createPublicClient, http } from "viem";

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

const blockNumber = await client.getBlockNumber();

web3.py

from web3 import Web3

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

Add Base to MetaMask

Bridging to Base

Official Base bridge (https://bridge.base.org) for canonical deposits (10-15 min) and withdrawals (7 days). Third-party fast bridges like Across, Hop, and Squid offer minute-scale transfers in both directions.

Features of SwiftNodes for Base

• 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 Base

Rate Limits

Frequently Asked Questions: Base

Base RPC methods

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

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

Base 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.
• Best Base RPC Providers (2026): Pricing, Free Tiers and Limits ComparedEight Base RPC providers compared on current pricing, free tiers and measured limits, with the monthly cost of 30M and 100M requests on each. Pricing checked October 3, 2026.
• Base RPC: Coinbase's OP Stack L2 for Consumer dAppsBase is Coinbase's Layer 2 built on the OP Stack, offering ~2 second blocks and gas fees around 0.01 gwei. Here's how to query it and what makes it different from other L2s.

Related L2 & rollup chains

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