Getting true random values for production software?

I need a service or an API for software in production to get true random numbers. For example CloudFlare has their "wall of entropy" and I have found random.org too, but I did not find any ways of getting true random values from CloudFlare, and random.org limits the number of requests.

I need a reliable and certified service. As a last option I know I could get hardware for doing the job, but it would be easier to just pay for a provider for this service based on requests or sg.

Any ideas? I googled a lot but have not found anything yet.