I'm looking for an API to get international sales tax configured in PayPal.
Our client configured international sales tax varies from country to country in PayPal: https://developer.paypal.com/docs/admin/checkout-settings/#access-your-sales-tax-rates-in-your-account-profile
We need to get sales tax configured in PayPal via API so that we can show tax in our web application cart page based on user country set in profile
Does PayPal have API exposed to achieve this?
No. Tax and shipping configured in the PayPal account is only for old HTML/link-only PayPal integrations from ~20 years ago, which predate the existence of APIs. It is not intended to be used, and will not work with, any newer PayPal integration.
Current PayPal integrations which calculate tax/shipping outside of PayPal must manage their own tax/shipping configuration, and specify the amounts when sending the transaction to PayPal.