Shopify Dynamic Shipping Checkout Integration

I need my Shopify checkout to pull live shipping costs from my logistics partner’s API and pass the final amount through Razorpay before the customer completes payment. The API documentation is already in hand, so you can dive straight into development without hunting for specs... (Budget: ₹1500 - ₹12500 INR, Jobs: API Development, API Integration, HTML, JavaScript, PHP, Shopify, Shopify Development, Web Development)