HSN/SAC Tax Lookup REST API

Search & Validate HSN/SAC Codes and GST Rate Programmatically

56^th GST Council – Updated GST Rates

Access the latest GST rates, including revisions from the 56^th GST Council (effective 22 Sept 2025).

AI-powered REST API for intelligent HSN/SAC fuzzy searches, Hierarchy traversals, GST tax breakdowns, and cess information.

Integrate FastGST's "Tax Lookup REST API" into Your App

Developers can easily integrate our HSN/SAC code lookup HTTP REST API to search HSN or SAC Codes, Find Sections, Chapters, Subheading hierarchies or Find GST and Cess rates and build your own financial applications. View API Documentation for integration guides.

Key Features for Developers

• AI Powered Fuzzy searches for HSN/SAC codes by keywords
• Complete hierarchy traversal and classification data
• Keyword Search, Heirarches and GST rate information and Cess details
• RESTful API with comprehensive developer documentation

Free HSN/SAC Code Lookup Tool

Try our free online tool to search HSN codes, find GST rates, and validate codes instantly. No API key required!

Try Free HSN Code Finder →

Frequently Asked Questions about HSN & GST

Disclaimer: We strive to provide the most up-to-date data using multiple automated and manual tax notification detection systems, sourced from trusted channels, but always verify against official government notifications for statutory compliance. Note: fastgst.in ("we", "our", "the API") provides this data based on publicly available sources. While we aim for accuracy, occasional discrepancies may occur, and users are responsible for verifying all GST-related information.

Fast Integration

Get up and running in minutes by simply enabling the API in developer portal.

Best Effort Compliance

Built with India's GST system in mind, ensuring best effort compliance and accuracy.

Developer-First

Comprehensive API documentation and developer tools to accelerate your integration.