Zwift decided not to offer an interface to sync their data with PerfectPace. We have contacted them several times already but this feature is not on their roadmap.
Currently you have to manually upload your Zwift rides.
If you would like to help us get an interface to Zwift please send this pre formatted email to Zwift.
Until Zwift changed their mind you have to upload your Zwift rides manually.
PerfectPace is the fastest growing training platform for triathletes, endurance athletes and trainer. Analyze your data, compare your activities of different sport types and find out in which sport you train the most. Where are your strength and weaknesses that might need special attention. Train, race and recover at your PerfectPace