Base API

Base, an Ethereum L2 platform, enables swift integration of EVM codebases and assets from Ethereum L1, Coinbase and other chains, ensuring cost-effectiveness and security.

Networks Mainnet
Released 2023
Consensus ЕTH Bridge L2
Smart contracts Yes
Block time ~2 seconds
Smart contract language(s) supported Solidity
Get started with Base

Bitcoin
Ethereum
XRP Ledger
Ethereum Classic
Bitcoin Cash
Dash
Litecoin
Dogecoin
Zcash
View all supported

The Base API — build without running a node

Access Base blockchain data through one unified REST API: transaction and address data, balances, block data, and real-time webhooks for on-chain events — with no Base node to run and maintain. Start free and scale as you grow.

Blockchain data

Read Base transactions, addresses, balances, UTXOs, and block data through one REST API.

Real-time webhooks

Subscribe to on-chain events — incoming and outgoing transactions, confirmations, and mined blocks.

No node to run

Skip the infrastructure — managed, always-synced access with no node to operate or maintain.

View the API docs Start building free

Building a full wallet? Explore HD Wallets.

Need prices too? See the crypto price API, or run your own Base RPC nodes.

What makes Base blockchain different?

Base, an Ethereum L2 platform, ensures security, stability, and scalability for on-chain applications. Any EVM codebase can be deployed to allow onboarding users and assets from Ethereum L1, Coinbase, and other chains. Integration with existing tools thanks to EVM compatibility is made possible. Additionally, its rollup architecture reduces user costs by 10x.

Frequently Asked Questions

Which blockchain does Base run on?

Base settles on Base. Tokens live in their own contracts rather than in the account balance, so reading them means calling the token contract; and every transaction needs the account's next nonce, which the same API returns.

What kind of chain is Base?

It is an account-model EVM chain — every address has a single balance and a nonce.

Can I test Base without spending real funds?

Yes — the same endpoints serve Base's Sepolia testnet, so you can build and verify an integration end to end before you touch mainnet.

How do I read Base balances and transfers?

Use Address Latest for current state and recent activity — it needs no setup and answers for roughly the last 14 days. For a full history, Address History requires the address to be synced first, which then bills per address per day for as long as it stays synced.

What does reading Base data cost?

It depends on the endpoint family rather than on Base itself: single-record calls are charged per request, while list endpoints are charged per page returned, and a synced address adds a daily monitoring charge. The pricing calculator has the current per-chain figures.