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.

Advanced Permissions use delegations under the hood — ERC-7715 creates ERC-7710 delegations internally. If the user hasn't specified which to use, present the options.

API references

Use case	Reference	Workflows
Create a smart account	toMetaMaskSmartAccount	Create hybrid account, Create multisig account, Create 7702 account
Create a delegation	createDelegation	Create delegation, Create redelegation
Request ERC-7715 permissions	requestExecutionPermissions	Request permissions, Redeem — smart account, Redeem — EOA

Workflows

Use case	Workflow
Create a Hybrid smart account	Create hybrid account
Create a MultiSig smart account	Create multisig account
Create a Stateless7702 smart account	Create 7702 account
Create and sign a delegation	Create delegation
Create a delegation chain (redelegation)	Create redelegation
Redeem a delegation when the delegate is a smart account	Redeem delegation — smart account
Redeem a delegation when the delegate is an EOA	Redeem delegation — EOA
Request ERC-7715 Advanced Permissions	Request permissions
Redelegate an ERC-7715 permission context	Create redelegation for permissions
Redeem ERC-7715 permissions when the session account is a smart account	Redeem permissions — smart account
Redeem ERC-7715 permissions when the session account is an EOA	Redeem permissions — EOA

Important notes

• Always use caveats — never create unrestricted delegations.
• Deploy the delegator first — the account must be deployed before redeeming delegations.
• Function call scope defaults to no native token — use valueLte to allow it.
• Caveats are cumulative in delegation chains — restrictions stack.
• ERC-7715 requires MetaMask Flask 13.5.0+ or MetaMask stable 13.23.0+, and the user must have a smart account.
• Always check that the project builds successfully after making changes.
• Smart Accounts Kit version: 1.6.0 | Delegation Framework: 1.3.0

Resources

• NPM: @metamask/smart-accounts-kit
• Contract deployments: Delegation Framework deployments
• Docs: https://docs.metamask.io/smart-accounts-kit
• MetaMask Flask: https://metamask.io/flask