That sounds very much like [API Blueprints](<a href="https:&#x2F;&#x2F;apiblueprint.org&#x2F;" rel="nofollow">https:&#x2F;&#x2F;apiblueprint.org&#x2F;</a>), which [Apiary](<a href="https:&#x2F;&#x2F;apiary.io&#x2F;" rel="nofollow">https:&#x2F;&#x2F;apiary.io&#x2F;</a>) back.  I tried to get the organisation I work for to standardise on them (being able to run tests from a versioned API specification seemed like a fantastic way to hit two birds with one stone), but sadly, couldn&#x27;t convince enough people.