Programs to calculate shipping by courier

Shopify App Store
1

Hi guys,

I need your help.
Can you tell me some api or Shopify native programs to calculate shipping by courier?

if yes, wich?

2

Hi - can you describe a bit more what you’re trying to achieve? eg, are you looking to enable carrier-calculated shipping? https://help.shopify.com/en/manual/fulfillment/setup/shipping-rates/third-party-carrier-calculated-shipping

3

Hi Liam,

Yes, enable carrier-calculated shipping like Fedex, DHL.
Today I have an Api to do that, but this api consumes a lot of performance cause when the client wants to calculate the shipping, the site request to API, which makes another request third-party website.

So I want to know if is another api or Shopify native app to do that for me in the best way.