Magento 2 product price and stock update with API

Hello,

we need to update our Magento 2.4 listed products price and stock across the supplier provided API.

In detail:
All the products have the "id" field same as the supplier, the default magento sku is different.
Server: Debian 9.13, nginx, php-fpm
Amount of requests: Per request you can ask for 100 products. Maximal 500 requests per hour.

Supplier API documentation can be found here:
https://developer{dot}kramp{dot}com/product-gross-prices-api-specification

If you have any questions, please feel free to contact me!
Best regards.