Run handlers with URI

Is it possible to run servant handlers with just URI? Meaning, can I run servant application without starting the e.g. wai server?

I'd expect the function to look something like this:

```haskell
runServerless :: Server api -> URI -> IO (Either ServerError a)
```

I guess I would be the one supplying type of the expected value `a` and `ServerError` would be returned in case matched `URI` route doesn't have that type.