I tried Voiden and like the idea, but in the end I think the notebook format felt a bit too freeform for an API tool. To me the point of an API tool is clarity of what I am doing and how they translates into code.
On a product note, I don't think the logo matches the name at all.
That why I love the git-backed notebook format. You can add clarity and explain what it's doing and how it translates into code.
thanks for the points- on the product comment: in what way you think it doesn't fit? genuinely interested.