I need to secure an API with API Keys. I’m looking...

# spring

[Axel]

I need to secure an API with API Keys. I’m looking for a finished solution that does the following:
1. Can automatically create an API key when a user creates a paid subscription in Stripe
2. Tracks usage of this API key so the user doesn’t go above quota
3. Implements global rate-limits per api key

I have found moesif.com but its a bit pricy, I can run some own infrastructure if it means lower cost.
Does anyone know of a tool like this?