Skip to main content

​
Overview

To read blockchain data (like balances or transactions) or write to it (like deploying contracts), you need a connection to a blockchain node. Node provides free blockchain access for developers building on Base, giving you instant RPC access without running your own infrastructure. Think of it as a direct line to the Base blockchain. You make requests, and Node handles all the complexity of connecting to and querying the network.

Try it now: Quickstart

Get your RPC endpoint and make your first blockchain request in minutes

Core EVM Methods

Standard Ethereum JSON-RPC methods

Paymaster Methods

Sponsor gas fees for users

Wallet History

Query wallet transactions and balances

​
Key features

  • Free blockchain access: Connect to Base Mainnet and Sepolia testnet at no cost with generous rate limits
  • No infrastructure to manage: Skip the complexity of running your own blockchain node—just use our endpoints
  • Standard Ethereum methods: Works with any Ethereum-compatible tools and libraries you already know, like ethers.js and Viem
  • Bonus features included: Get extra capabilities like gas sponsorship (Paymaster) and wallet history queries built right in

​
Use cases

  • Build DeFi apps: Create trading interfaces, lending platforms, or dashboards that display live blockchain data
  • Create NFT platforms: Build marketplaces that show who owns which NFTs and track their transfer history
  • Develop wallet apps: Display user balances, show transaction history, and send transactions on behalf of users
  • Deploy smart contracts: Upload your contracts to Base and interact with them programmatically

​
Supported networks

Currently available on:
  • Base Mainnet - Production environment for live applications
  • Base Sepolia - Testnet for development and testing
Base is a secure, low-cost, builder-friendly Ethereum L2 built to bring the next billion users onchain. Learn more about Base.

​
Getting started

Ready to connect to Base? Our quickstart guide walks you through everything step-by-step—from trying Node in the browser playground to making your first programmatic request with code examples in multiple languages.

Start building: Quickstart

Get your RPC endpoint and make your first blockchain request in minutes

​
Rate limits

Free users are rate limited to 7500 API credits every 5 seconds per project. Each JSON-RPC method uses an assigned amount of API credits per call. The average JSON-RPC call uses 30 API credits, so expect approximately 50 requests per second maximum. Need higher limits? Builders get a free rate limit increase. Join our Node Discord channel to request a bumped limit.
CDP currently doesn’t have a paid tier for RPC Node. All increases are provided to builders at no cost.

​
API Reference

When you’re ready to build, explore the available methods:

​
Support and feedback

  • CDP Discord: Join #node for support and to request rate limit increases
⌘I