I need our three core platforms—fintech, property-management, and tourism booking—to communicate through a single, well-documented API layer. The immediate priority is merging folio management from the PMS with both the payment rails of the fintech system and the tour-booking engine so that customer invoicing flows automatically, regardless of where a charge originates. Here’s how I see the work breaking down: • Map existing endpoints and data schemas for each system, then design a unified contract (REST or GraphQL, whichever suits performance and security best). • Build the middleware that syncs booking details, folio updates, and payment confirmations in real time. • Enable automatic invoice generation inside the PMS whenever a guest books a tour or incurs a fintech transaction. • Deliver thorough API documentation, environment variables, and test suites so our internal team can extend the integration without guesswork. Acceptance will be based on end-to-end tests that show a successful booking in the tour platform, immediate folio update in the PMS, and an invoice issued and paid through the fintech gateway—all without manual intervention.