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Best Base-Sepolia RPC Nodes and APIs

Base is a secure, low-cost, builder-friendly Ethereum L2 built.

Connect in seconds to Base-Sepolia via OnFinality's elastic API with a high availability of 99.99% uptime per year.

Base is a secure, low-cost, builder-friendly Ethereum L2 built.

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API Service

API Features

Archive

API Based In

FranceN.Virginia

Base is a secure, low-cost, builder-friendly Ethereum L2 built to bring the next billion users onchain.

Base is incubated within Coinbase and plans to progressively decentralize in the years ahead. We believe that decentralization is critical to creating an open, global cryptoeconomy that is accessible to everyone.

Additional Info

Project Website
Documentation

Base-Sepolia Public Endpoint

The below example uses the public API endpoint*. This endpoint is only suitable for testing. To avoid rate limiting and service interruption, sign up now to get your own API key.
curl -H 'content-type:application/json' -d '{"id": 1, "jsonrpc": "2.0", "method": "eth_blockNumber"}' 'https://base-sepolia.api.onfinality.io/public'
https://base-sepolia.api.onfinality.io/public

* The public endpoint is rate limited

API SERVICE
Unlimited requests, high rate limits
Powerful API analytics
99.99% uptime
Connect via HTTPS or websocket
Decentralised servers hosted globally
Full archive access at no extra cost
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Calculate Your Costs

Only pay for what you need.

Million Standard Requests
0100M200M300M400M
Total Cost
$49/ month

Recommended Plan: GROWTH

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Latest Base-Sepolia Updates!

OnFinality graphic on building a dApp on Base Sepolia, highlighting what most Web3 guides leave out.

Mar 06,2026

Building a dApp on Base Sepolia? Here’s What Most Web3 Guides Leave Out

Most Web3 guides skip the infrastructure layer. Discover how to build a blockchain dApp on Base Sepolia with OnFinality and understand the architecture that makes it scalable.

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