Is there a way for users to jump to my website for payment during checkout?

Topic summary

Seeking a way to redirect customers from Shopify’s checkout to an external website to complete payment, then reflect the payment outcome back in Shopify.

The goal is to build a custom checkout page outside Shopify.

Proposed workflow: during checkout, send users to the external payment page; after payment, programmatically update the order status in Shopify via the API.

API (Application Programming Interface) would be used to update order status after payment.

No implementation details, constraints, or solutions were provided; the question remains open.

Summarized with AI on March 4. AI used: gpt-5.

Is there a way for users to jump to my website for payment during checkout?

Then update the order status on shopify through the API.

I want to make my own checkout page.