How to get API Data for a shop collaborator?

We need to get product data (SKU, Name, Description, Stock, Image, Price, Categories, and Options are mandatory fields) from Wix site in any of the formats: JSON, XML or CSV to the Fashion Store Atterley. How can I get the API Information?

https://www.wix.com/corvid/reference/wix-stores-backend.html
https://www.wix.com/corvid/reference/wix-stores-backend.Events.html
https://www.wix.com/corvid/reference/$w.ThankYouPage.html#getOrder

https://www.wix.com/corvid/reference/wix-fetch.html
https://support.wix.com/en/article/corvid-accessing-third-party-services-with-the-fetch-api

https://www.wix.com/corvid/forum/corvid-tips-and-updates/example-myapi-and-myapiclient

https://www.wix.com/corvid/reference/wix-http-functions.html
https://support.wix.com/en/article/corvid-exposing-a-site-api-with-http-functions

Thank you very much! Does it mean I need a third party service to get the info?