We see the API for Creating & Updating Products via REST API calls.
Is there a way to create or update multiple products in a single API call ?
i need same thing
Can /admin/api/2020-10/products.json this endpoint accept product array ?its would be very useful
No. There is no Bulk Product Create in the Rest API and it is pretty sure there never will be. You use RestAPI, make an API call per product.