Api And Vst Parameters

Does the api have access the read a VST’s automation parameters and their values?

Yes.

For track effects, look for:
renoise.song().tracks[].devices[].parameters[]

For instrument plugins, look for:
renoise.song().instruments[].plugin_properties.plugin_device.parameters[]

@see: https://code.google.com/p/xrnx/source/browse/trunk/Documentation/Renoise.Song.API.lua

Thanks :)