Check and claim a Swiss rent reduction: statutory reference rate (Referenzzinssatz, 1.25% since 02.09.2025), the 2.91% decrease per 0.25 point step, the 30-day reply and 60-day conciliation deadlines, and a documented written request.
The endpoints above work without an account, up to the anonymous daily limit.
Recommended next step. An email address is all it takes. The same key keeps working if you ever move to a paid plan.
The free key keeps working month after month. If you ever reach its monthly limit, the API says so and links to the options — nothing is charged without you.
Part of rowb.app.