The average service score can found in the data returned as part of a summary report created by our XML feedback API. For example:
https://api.feefo.com/api/xmlfeedback?merchantidentifier=example-retail-merchant&mode=service&summary=true for the service score.
Look for the <FIVESTARAVERAGE> tag to see the average score based on the 5 star rating (out of 5) or the <AVERAGE> tag for the average score out of 100.