What can be bought, for how much, for how long. No credential, no workspace named.

Needs NO credential. Reachable at https://forbiz.io/api/public/billing/offer — it is NOT under the agent base. States the plan, the period length in days, the amount, the currency, renews false, what it unlocks and how it can be paid. refund_policy and terms read "not_published" while none is decided.