MetaMask Smart Accounts Kit

When to use

• You want to create ERC-4337 smart accounts (Hybrid, MultiSig, or Stateless7702)
• You want to send user operations or batch transactions via bundlers
• You want to configure signers (EOA, passkey/WebAuthn, multisig, wallet client)
• You want to implement gas abstraction with paymasters
• You want to create, sign, or redeem delegations (ERC-7710)
• You want to request Advanced Permissions via MetaMask extension (ERC-7715)
• You want to build automated backend services (DCA bots, keeper services) using delegations
• You want to implement session accounts for AI agents or automated trading
• You want to set up parallel user operations with nonce keys

Installation

npm install @metamask/smart-accounts-kit permissionless

Which smart account type to use

Name	Usage
Hybrid	A flexible account with EOA, wallet client, and passkey (WebAuthn) signers. The most flexible option for standard dApp users.
MultiSig	Requires multiple signers to meet a threshold before transactions execute. Best for treasury, DAO, or shared custody use cases.
Stateless7702	Upgrades an existing EOA to a smart account using EIP-7702 while keeping the same address. Best for users with existing embedded EOAs.

If the user hasn't specified which implementation they need, present the options.

Delegations vs Advanced Permissions

Name	Usage
Delegations (ERC-7710)	You create, sign, and manage delegations programmatically. The delegator is a smart account you control. You handle the full lifecycle: creation, signing, storage, and redemption.
Advanced Permissions (ERC-7715)	You request permissions from a MetaMask user through a human-readable UI in the extension. MetaMask creates and enforces the delegations internally. The user can review and adjust parameters before approving.