Managing General Purpose Account Balances with Marqeta API

Every modern fintech application must track account balances with absolute precision to prevent overdrafts and ensure smooth transaction flows. Understanding how ledger balances, pending credits, and real-time funding interact is critical to building robust payment solutions. This text-based course guides you through the core concepts and execution of managing General Purpose Account (GPA) balances. You will transition from a foundational understanding of card ledger architecture to confidently querying and interpreting real-time balance data. Through clear explanations and structured code examples, you will learn to handle complex cardholder balance states and configure authorization flows. What you'll learn: - Understand the core terminology of General Purpose Accounts and ledger structures - Retrieve and interpret ledger, available, and pending credit balances using API requests - Configure Just-in-Time (JIT) gateway funding to approve or decline transactions dynamically - Apply modern secure coding practices to handle financial API payloads - Track transaction histories and reconcile balance discrepancies systematically Starting with basic financial concepts and REST API fundamentals, the course moves step-by-step through standard balance lookups, advanced JIT funding mechanisms, and balance reconciliation. It is designed specifically for software engineers, product managers, and fintech enthusiasts who are new to payment APIs. No prior payment processing experience is required. Start reading to master modern card program balance management.