It is the job of a seller to provide automatic and reliable shipping cost calculation during checkout.
For Philippines this is perfect extension to provide integrated shipping cost calculation for JNT Shipping.
How this extension will help you?
This extension works by scraping the cost data from JNT Philippines official site.
That is: https://www.jtexpress.ph/index/query/query.html
How this system benefit to you?
You don't need to spend budget on monthly or annual subscription.
This extension will work as long as JNT Philippines official site still exist!