Ask HN: What percentage of your company's revenue is based on its APIs?

I'm currently working on a concept for a new type of revenue model based around hybrid SaaS services. Consider the MSP model evolving into SaaS models back in the day for a comparative concept. These new hybrid services are run operationally similar to SaaS services, but on-prem for security and privacy based use-cases. My question to HN is this: "What percentage of your company's total revenue is made by customers using API calls to your infrastructure and are those calls hosted primarily in private or public cloud?" Thank you for your time. Happy to answer any questions about this concept.