RoundSky is a U.S. based advertising service that specializes in payday loans, title loans, and installment loan products. The company provides its services primarily to direct payday loan lenders, installment lenders, title loan lenders, store fronts, and financial market vendors. The RoundSky Lead-Seller API allows users to integrate third party systems with the lead selling service with RoundSky. The API uses REST calls and returns JSON and XML, the API allows users to access multiple price points with static and revenue share pricing as well as get real-time lead response. An account is required with service.