# WhiteBooks GST API for Developers

> WhiteBooks GST API: REST API for GST return filing (GSTR-1, GSTR-3B, GSTR-9), ITC reconciliation against GSTR-2B, GSTIN search, and HSN/SAC lookup. GSP-licensed by GSTN — uses authorised government channel rather than scraping.

URL: https://whitebooks.in/api/gst-api-for-developers

## Key facts
- Endpoints: GSTR-1 prepare/file, GSTR-3B prepare/file, GSTR-9 annual return, GSTR-2B fetch, GSTIN search, HSN/SAC lookup
- Authentication: client_id + client_secret in headers + OAuth 2.0 bearer token
- Base URLs: Sandbox apisandbox.whitebooks.in/public · Production api.whitebooks.in/public
- Request/response: JSON (multipart CSV for bulk)
- Rate limit: 60 req/min sandbox · enterprise plans support burst
- Errors: HTTP status + error code + human-readable message
- SDKs: Java, Node.js, Python with code samples
- OpenAPI 3.0 spec available · Postman collection downloadable

## Contact
- Sales: +91 9032111788 · sales@whitebooks.in
- Technical support: +91 9032111388 · support@whitebooks.in
- Address: 8-2-682/3/A/24, Road No 12, Banjara Hills, Hyderabad, Telangana 500034, India
- Parent company: BVM IT Consulting Services India Private Limited (www.bvmcs.com)

## Machine-readable resources
- Site-wide index: https://whitebooks.in/llms.txt
- Full content: https://whitebooks.in/llms-full.txt
- AI crawler policy: https://whitebooks.in/.well-known/ai.txt
- Sitemap: https://whitebooks.in/sitemap-index.xml
- Robots: https://whitebooks.in/robots.txt