Just read nostr:npub10j0z8a0xaxm6fqg8ykgef8rej5unw3xwwghr3a03dr3fj2mq0ttsyyauws kvetching about the state of podcast analytics, at https://blog.lime.link/real-time-podcast-stats/

I guess he's not heard of nostr:npub1dznhhga669k20k8rjzmls6lu5uhkus9s3xcg3t2f3quswnc2sdqs5v4dfn 's OP3 - a service that is free and has the API he's looking for (and more to come!). Here are many of the people using it: https://podcastbusinessjournal.com/data/podcast-downloads/