Publishable key only
Widget origin: …
This page mounts with publishableKey and does not call POST /session. The iframe
mints by itself only when no-backend minting is on for that key. The option is off by default. Turn it on in
Design Studio after saving an allowed origin. This path is best-effort: 1inch can throttle it or turn it off,
and the embed says the widget is not available when the product flags are off. A session that must stay
available should mint with the secret key from your own backend.