The only B3
provider you’ll ever need

Build on B3 with the fastest RPC Nodes, a comprehensive library of web3 APIs, and the most performant blockchain ETL tools—all backed by enterprise-grade infrastructure.

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Trusted by the best

Battle-tested
infrastructure
for B3 builders

Providing performance and reliability at scale for the world's top businesses and onchain projects. Join them.

400 billion+

API requests handled monthly, we can handle any volume you need.

99.99%

Uptime SLA ensures you're only paying while we're online.

2.5x

Faster API response times than our competitors.

24/7

Access to our support team, Discord community, and docs.

Everything you need to build on B3,
all under one account

2 supported networks

B3 Sepolia Testnet
B3 Mainnet

// import the QuickNode SDK

import { Core } from '@quicknode/sdk'

// create a connection to your endpoint

const core = new Core({

endpointUrl: "https://docs-demo.quiknode.pro/",

})

// call the getBlockNumber method

core.client.getBlockNumber()

Core RPC API

Reliable & scalable
RPC endpoints

Access reliable and scalable RPC endpoints to interact with B3.

Create an Endpoint Learn more

Looking for something dedicated?

Check out clusters

Streaming block data

18% complete

137 blocks till tip

Last streamed block: 10343453

Webhook destination

https://quicknode.com/api/webhook

Payload logs

View all logs

10343454
Retry 1 of 3...
10343454
Handshake error
10343454
1 min ago
10343454
1 min ago
10343454
1 min ago

Streams

Real-time streaming data & historical backfills

Stream data from B3 to your application in real-time. Monitor transactions, logs, and more.

Learn more

Not yet supported on B3

Functions

Serverless functions for web3 developers

Filter, transform, and enrich blockchain data in real-time with serverless functions, optimized for web3.

Learn more

Not yet supported on B3

Marketplace

Supercharge your dApp with add-on services

Integrate with add-on services and tools to enhance the functionality of your B3 application.

Browse all our add-ons

Featured

Crypto Market Data API

Get real-time, ultra-low latency data from over 350 exchanges with CoinAPI’s Market Data API, designed for seamless integration and robust support for advanced crypto trading and analytics.

Learn more about B3,
and how to get started

Why build on B3?

B3 is a gaming ecosystem, built on Base, that aims to bring the next generation of gamers and game creators on-chain.

B3 is a rollup built on the OP Stack, earning its maintainers new revenue streams and benefitting from dedicated block space.

Explore Rollups as a Service

The only B3 provider you’ll ever need