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name: smart-accounts-kit description: Build dApps with MetaMask Smart Accounts Kit — ERC-4337 smart accounts, delegations, and Advanced Permissions (ERC-7715)

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