Find forgotten subscriptions in your Brazilian credit card — what to install, with the recipe
How an AI agent audits a Brazilian user's credit-card and account transactions for recurring charges. Install Cumbuca's Open Finance Data MCP, authorize through your bank (CPF + biometric), and run a deterministic clustering recipe — merchant normalization + median-interval cadence detection + coefficient-of-variation amount tolerance + recency-based status classification. Production-ready on May 2026 with Cumbuca's MVP scope (statements + credit-card transactions, single account, ~5 queries/day, BR banks only).