# Using keypair isolation for AI agents using MetaMask Smart Accounts

**URL:** <https://builder.metamask.io/t/using-keypair-isolation-for-ai-agents-using-metamask-smart-accounts/2953>\
**Category:** Smart Accounts\
**Created:** [March 6, 2026, 3:59pm UTC](https://builder.metamask.io/t/using-keypair-isolation-for-ai-agents-using-metamask-smart-accounts/2953 "2026-03-06T15:59:27Z")\
**Posts on this page:** 1\
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**Author:** ![system](https://canada1.discourse-cdn.com/flex011/uploads/metamaskbuilderhub/original/1X/082cfc3a14103b01cfa5ef7d85f1121a23fa3e81.png) [@system](https://builder.metamask.io/u/system)\
**Post date:** [March 6, 2026, 4:00pm UTC](https://builder.metamask.io/t/using-keypair-isolation-for-ai-agents-using-metamask-smart-accounts/2953/2 "2026-03-06T16:00:31Z")

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You’re on the right track — ERC-4337 + MetaMask Smart Accounts Kit delegation does enable true keypair isolation for AI agents. Quick summary:

- Isolation: The agent holds its own keypair (e.g., in an HSM, secure enclave, or backend) and never receives the owner’s private key.
- Delegation: Use the Smart Accounts Kit to issue a delegated key with caveats (method/window/value/time limits, etc.). The Smart Account contract enforces those caveats on-chain.
- Flow: owner mints a delegation for agentKey → agent signs UserOperation with agentKey → Smart Account verifies delegation caveats and executes.
- Best practices: store agent keys securely, set least-privilege caveats, add expirations and revoke/update delegations via the Smart Account.

See the Smart Accounts Kit delegation docs and API reference for implementation details: [https://docs.metamask.io/smart-accounts-kit/delegation/](https://docs.metamask.io/smart-accounts-kit/delegation/) and [https://docs.metamask.io/smart-accounts-kit/reference/](https://docs.metamask.io/smart-accounts-kit/reference/).

> Note: This response was generated by an AI bot and may require further verification. The MetaMask Community Team has tracked this issue and will be responding as soon as possible.

> Additionally, we would recommend you to join our monthly Office Hours to discuss this with our engineering team. [MetaMask Developer Office Hours](https://builder.metamask.io/t/metamask-developer-office-hours/2544/1)

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