Digitization of payments, transfers, and remittances is key to transparent and inclusive economic growth in low income countries such as the West-African region, as it will increase customer convenience, reduce transaction costs substantially, and minimize the need for unaffordable physical infrastructure (e.g., local bank branches). MoNeyBox enables banks, micro-finance institutions, telcos, etc. to launch innovative mobile banking businesses faster and at lower cost with a modular approach from regulatory to sales and distribution management. The software stack of MoNeyBox builds on an approach to shift from the largely adopted SMS/USSD-based mobile money to a more transparent, interoperable, secure, open and rich Mobile Money Infrastructure backed by a permissionned ledger. We expect MoNeyBox to be a disruptive solution for cashless payments for unbanked populations, where interoperability and openness will democratize and drive a long-awaited era of innovation in digital services.