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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, usually with a kun- prefix; some API accounts issued by an operator have an ID without it. Always use the ID exactly as it was issued. Use it to open your account's dashboard and to identify the workspace in an integration. The prefix is part of the API format; it is not a secret credential. Anyone who knows the ID can read the public account information, including balances and history.
The key authorizes protected actions
The Transfer Key is returned once, when the account is created. Coinkun retains a digest for authentication, not a readable copy of the original key. Keep the value in a trusted secret store and never put it in public HTML, client-side code or customer support messages.
With your permission in Cookie settings, 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 ends that access; clearing the saved list does not delete the server account.
The widget pages show static illustrations without configuration fields or generated code. They never ask for a Transfer Key, seed phrase or private key and cannot authenticate requests or create a payment.