A call center is a media that can accommodate customer complaints, including IPTV customers. However, along with the development of IPTV technology, PT Telkom customer complaints through call center 147 are increasing so that call center traffic is also higher, and solutions are needed to reduce the traffic that appears on back end tickets. One of the most common IPTV customer complaints is the difficulty of subscribers to subscribe to additional features provided by the provider. In response to this, we designed a payment system where customers can make payments for many features on a self-care basis based on Application Programming Interface (API), known as Multi- services On-Screen Subscription (MOSS). The API functions as a tool to connect several applications through one interface to simplify the operating system. The payment system designed can be used prepaid or postpaid. It is hoped that the presence of MOSS will improve the Quality of Experience (QoE) because USeeTV customers do not have to waste time contacting call center 147. MOSS also combined with variation of Financial Technologies to support Industry 4.0.