Yes, without an active subscription.

https://docs.stadiamaps.com/geocoding-search-autocomplete/bu...

> Can I Store Geocoding API Results?

> Unlike most vendors, we won't charge you 10x the standard fee per request to store geocoding results long-term! However, we do require an active Standard, Professional, or Enterprise subscription to permanently store results (e.g. in a database). Temporary storage in the normal course of your work is allowed on all plans. See our terms of service for the full legal terms.