I want to delete all product using Rest API in Magento 2.
You can delete all products by iterating them and calling the rest DELETE command on
Here is the specific endpoint: https://devdocs.magento.com/redoc/2.3/admin-rest-api.html#operation/catalogProductRepositoryV1DeleteByIdDelete
A list of endpoints can be found here: https://devdocs.magento.com/guides/v2.3/rest/list.html
Integrations don't by default, have this ability though. You have to login and get an access token.