Your Account ID is not your Transfer Key
Two values appear when you create an account. They have different jobs, and treating them differently is an important first step.
The ID identifies the workspace
An Account ID is a public reference with an apr- prefix. Use it to open your account's dashboard and identify the workspace in an integration. The prefix is part of the current API format; it is not a secret credential.
Remembered is not unlocked
The dashboard can remember public IDs in localStorage. Selecting one is a convenience, not proof of authorization. Unlocking uses the Transfer Key and establishes short-lived session access. Locking the dashboard clears that access.
What a preview needs
The widget builder only offers a public Account ID field. It never asks for a Transfer Key, seed phrase or private key. Its output is disabled preview markup and cannot authenticate requests or create a payment.
Read the account API guideYour next step starts here.
Explore the dashboard and learn the API. Check the configured network before sending funds.