Zoho Expense–PayPal Integration

I already run all of our reimbursements through Zoho Expense and now need it to talk smoothly with PayPal. The goal is simple: when a payment is made in PayPal I want that transaction to appear in Zoho... (Budget: $30 - $250 USD, Jobs: API Integration, CRM, OAuth, PayPal, PHP, Software Architecture, Zoho)