Building the product so the API (application programming interface) is the actual product and any dashboard or UI is just a thin layer on top.
Twilio launched in 2008 selling something previously locked behind telecom contracts: send a text message, receive a phone call, with a REST API and pay-as-you-go pricing. By the mid-2010s nearly every consumer app's two-factor codes, ride confirmations, and appointment reminders ran through it. The company never built an end-user product, the API was the product.