API gets thrown around pretty loosely, but what Hubspot has isn't really an application programming interface. It is a state transfer service, as echoed in the documentation.
While am I sure their service is not free of flaws (the versioning as described comes off especially strange), the biggest issue here may be taking "API" too literally. What you are looking for is, indeed, an API, but that is not what they have on offer. Presumably their expectation is that you will build your API on top of the transferred state.
While am I sure their service is not free of flaws (the versioning as described comes off especially strange), the biggest issue here may be taking "API" too literally. What you are looking for is, indeed, an API, but that is not what they have on offer. Presumably their expectation is that you will build your API on top of the transferred state.