Legal & Disclaimer

Versioning & Specification

• API Version: v1.0

• OpenAPI: OAS 3.0

• OpenAPI JSON: /openapi/v1.json

Disclaimer

fastgst.in (“we”, “our”, “the API”) provides GST-related data, including HSN/SAC codes and tax rates, based on publicly available information from the GST Council, CBIC notifications, and other trusted sources. While we strive for accuracy and regularly update our database, occasional discrepancies or delays may occur between official government releases and our updates.

By using this API, you acknowledge and agree that:

1. The API is provided “as-is” and without any warranty, express or implied, including but not limited to accuracy, completeness, reliability, or fitness for a particular purpose.

2. Users are solely responsible for verifying all GST-related information and ensuring compliance with applicable laws, regulations, and government notifications.

3. We do not accept any liability for any direct, indirect, incidental, or consequential loss or damage arising from the use of this API or reliance on its content.

Use of this API constitutes acceptance of this disclaimer.

Data Freshness & Updates

We operate state-of-the-art infrastructure, automation and manual verification systems to monitor GST rate changes and notifications from the Government of India. We strive to ingest and unify updates quickly. Occasional delays or mismatches can occur and are typically patched promptly once detected by our monitoring.

Policy Context

We have updated endpoints and bulk data following the 56th GST Council meeting (3 September 2025, New Delhi). The Council approved a two-tier GST rate structure of 5% and 18%, removing the 12% and 28% slabs. CBIC issued notifications on 17 September 2025, with most changes effective 22 September 2025. Always verify any transitional provisions and notification specifics for your use case.