Thanks @Yisrael, I’ve had a good read over these resources already, I think the my biggest hurdle is that this is an SOAP XML API and wix-fetch seems to be geared around more moden REST/JSON calls. I think what I need to do should be possible with wix-fetch by manually defining the header and body as part of the WixFetchRequest, however I think an example of an XML SOAP implementation would be helpful for me to see how to do this (this is my first time with SOAP). If anyone out there has done this, I would be most grateful if they would share some knowledge.