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.
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
- B3 Sepolia Testnet
- B3 Mainnet
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Reliable & scalable
RPC endpoints
Connect to B3 with one line of code and get unparalleled latency, reliability, and scalability.
- B3 Sepolia Testnet
- B3 Mainnet
- Webhook ReceivedJust now
{ "id": 27774258, "eventType": "transfer", "chain": "B3", "timestamp": 1744984842549, "address": "0x57cfd5d72a6a2f72", "amount": "39.697", "token": "AAVE", "timeAgo": "45 min ago" }
- Webhook ReceivedJust now
{ "id": 27774258, "eventType": "transfer", "chain": "B3", "timestamp": 1744984842549, "address": "0x57cfd5d72a6a2f72", "amount": "39.697", "token": "AAVE", "timeAgo": "45 min ago" }
- Webhook ReceivedJust now
{ "id": 27774258, "eventType": "transfer", "chain": "B3", "timestamp": 1744984842549, "address": "0x57cfd5d72a6a2f72", "amount": "39.697", "token": "AAVE", "timeAgo": "45 min ago" }
Target live events
Stream live blockchain events with built-in transformation and reorg handling, delivering raw or filtered data instantly.
- B3 Sepolia Testnet
- B3 Mainnet
Historical backfills
Deliver raw or filtered historical blockchain data sequentially, with guaranteed delivery and flexible batching options.
Supercharge your dApp with add-on services
Integrate with add-on services and tools to enhance the functionality of your B3 application.
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 built leveraging the OP Stack, the world's most popular application-specific chain framework.
Launch your own RollupB3 RPC Docs
Browse our robust documentation for all of our supported chains and learn how to call RPC methods using up-to-date libraries and code examples across Python, Ruby, JavaScript, and cURL.