How can an AI agent follow a signup verification link?
The agent reads the new message from an inbox it is allowed to use, checks where the link goes, and opens it inside the sign-up it started.
Treat the message as untrusted input and keep the link private: holding the link may be enough to complete verification.
A builder's sign-up workflow describes connecting the browser and the inbox in one sequence.
A practical sequence
- Record which account and address the sign-up uses, and when the verification message was requested.
- Wait, with a timeout, for a new message to that address. Match the expected service and purpose; a sender display name is not proof on its own.
- Read the link's destination. Compare its host and path with the service's own sign-up instructions. If it points somewhere unexpected, stop and investigate.
- Open it in the browser session the service expects. Confirm the page says verification succeeded before continuing.
- Keep the full link out of logs and screenshots. If it expires or fails, follow the service's recovery flow, and check whether the account already exists before retrying.
The website sets its own verification rules. An inbox cannot turn a rejected or expired link into a valid one.
ActAs gives each agent its own inbox, and a connection that reads only the inboxes you tick. The guide to an agent signing up by itself covers the link step.