Base Account Overview

What is a Base Account and how the Base Account SDK lets you add universal sign-in and one-tap USDC payments to any app.

TL;DR – Base Accounts are the onchain identity and account layer powering the Base App. With the Base Account SDK you can connect to over one hundred thousand users and unlock authentication and payments with just a few lines of code.

What is a Base Account?

A Base Account is a Smart-Wallet–backed account that gives every user:

• Universal sign-on – one passkey works across every Base-enabled app.
• One-tap payments – low-friction USDC payments built into the account layer.
• Private profile vault – opt-in sharing of email, phone, shipping address, and more.
• Multi-chain support – one address that works across many EVM networks.

Under the hood, each Base Account is an ERC-4337 Smart Wallet that can be deployed on any EVM-compatible chain; many EVM mainnet chains are enabled out of the box, including Base Mainnet.

Supported networks

Full support

• Mainnet: Base • Arbitrum • Optimism • Zora • Polygon • BNB Chain • Avalanche • Ethereum
• Testnet: Base Sepolia • Sepolia

Basic support: Monad • Unichain • ZKsync

Basic support only includes transfers through the Base Account Web surface for select tokens.

Why should developers care?

• Higher conversion – no app installs, seed phrases, or network switches.
• Fewer drop-offs at checkout – a single pay() call handles gas and settlement.
• Cross-app identity – fetch a verified email or shipping address via the same SDK.
• Self-custodial – users hold the keys; you never touch private data or funds.

Where Base Account fits

Base App

Base Accounts power sign-in, payments, identity, and wallet interactions in the Base App.

Base Dashboard

Register apps, manage Builder Codes, and access app analytics from the developer dashboard.

Apps

Build standard web apps that connect through Base Account in the Base App.

Builder Codes

Attribute onchain activity from Base Account transactions back to your app.

Next steps

Goal	Start here
Build & run in 5 min	Quickstart
Authentication flow	Authenticate users
Accept USDC payments on Base	Accept payments
Deep-dive API shapes	TypeScript API reference