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Sales Tax API

Automate sales tax, VAT, & GST, on your terms

Integrate powerful tax automation directly into your product, platform, or workflow with the Kintsugi API and SDK.

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Trusted by 8,000+ businesses

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Calculate Tax at Checkout

Get precise sales tax, VAT, and GST calculations for every transaction, no matter the channel or geography.

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Automate Tax Compliance

Track where you have exposure globally. Initiate and manage sales tax, VAT, and GST registrations for all jurisdictions directly from your app or platform. Kintsugi handles the filing for you.

Build Seamlessly Into Your Stack

Whether you’re using Stripe, Shopify, Chargebee, or your own custom stack, our SDKs and RESTful API let you integrate where you need.

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Why Use the API?

  • Flexibility - Automate tax compliance workflows without changing your core systems.
  • Speed - Embed compliance into your product or internal tools in days, not weeks.
  • Control - Send data, trigger events, or pull status updates in real time.
  • Scalability - Designed to support SaaS, ecommerce, usage-based, and hybrid revenue models.
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