Stripe has Markdoc[0] but it doesn't seem to be automated in any way.
[0]https://markdoc.dev/
I too am inspired by Stripe's API documentation. Specifically, I like that it:
1. shows the API reference alongside the requests and responses
2. gives code examples of how to use the client libraries (e.g. python, node.js, go, java)
3. is one, continuously scrolling page
---
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