Connect your site to the services you already use.
Ask the builder for the feature. When it needs a key, a card in the chat asks an owner or admin to save it, and the builder carries on. You can also add keys from the builder’s More tab, next to Preview and Code, or Settings → Developer → Secrets.
Saved keys are encrypted, and no one sees a value again after it is saved, including the builder. A key pasted into the chat is taken out of the message and offered to save instead.
See Add API keys.