API v1.0 Live
GST Verification API for Fast, Secure GSTIN Validation
Verify GST numbers in real time using a secure, developer-friendly API. Built for SaaS platforms, ERP systems, marketplaces, fintech apps, vendor onboarding, and businesses that need reliable GSTIN validation with prepaid credit-based billing.
{
"apiKey": "YOUR_API_KEY",
"gstNo": "29AAKFC9972K1ZN",
"mode": "test"
}
Trusted by
SaaS PlatformsERP SystemsMarketplacesFintech TeamsB2B Businesses
// Features
Everything You Need in a GST Verification API
A complete GST number verification API platform with secure authentication, prepaid credits, usage logs, client dashboard, admin controls, and developer-ready documentation.
Real-Time GSTIN Verification
Validate GST numbers instantly and receive structured taxpayer details in a clean JSON response for faster onboarding and compliance checks.
Secure API Key Access
Each client gets a unique API key or secret with secure validation, blocked-user checks, masked display, and controlled access from the dashboard.
Admin Control Panel
Manage clients, API keys, credits, orders, earnings, usage logs, pricing rules, blocked users, and support requests from a centralized admin panel.
Prepaid Credit Billing
Sell GST verification as a prepaid API service. Clients can recharge credits, track deductions, and pay only for successful or chargeable API usage.
Developer Documentation
Provide clear API documentation with endpoint details, request body, headers, sample responses, error messages, and test/production mode notes.
Client Usage Dashboard
Clients can view free credits, paid credit balance, last usage, API logs, orders, invoices, and minimum balance alerts in one place.
// How It Works
Three steps to verification
Create an account, verify your details, receive free trial credits, and get your unique API key or secret from the client dashboard.
01
Register & Get API Key
Sign up with your email, verify OTP, and receive your unique API key instantly. Free trial credits included.
02
Integrate the API
Send a POST request with the GST number and API key. Use test mode during development and switch to live mode when ready.
03
Verify & Scale
Verify GSTINs in real time, monitor every API call, buy prepaid credits, download order records, and set low-balance alerts.
// Pricing
Flexible Prepaid Pricing for GST Verification API
Start with free trial credits and recharge as your usage grows. Final credit conversion, tax, and pricing rules can be configured from the admin panel.
Free Trial
For testing the GST verification API before recharge
₹0
100 credits / ₹5.0 per verification
✔️ Free trial API requests
✔️ Test mode access
✔️ API documentation
✔️ Client dashboard access
✔️ Usage log preview
Business
For businesses with regular GSTIN verification needs
₹2,999
1,100 credits / ₹3.0 per verification
✔️ 1,100 API Credits
✔️ Live + Test Mode
✔️ Priority Support
✔️ 90-Day Validity
✔️ Usage Analytics
Enterprise
For SaaS, ERP, fintech, and marketplace platforms
₹9,999
5,500+ credits / ₹2.0 per verification
✔️ 5,500+ API Credits
✔️ All Modes
✔️ Dedicated Support
✔️ 180-Day Validity
✔️ Custom Integration
// FAQ
Frequently Asked Questions
A GST Verification API allows businesses to validate GST numbers programmatically and fetch structured taxpayer details inside their own software, website, ERP, CRM, marketplace, or onboarding workflow.
The client sends a GST number and API key through a secure API request. The system validates the GSTIN format, checks the API key and credit balance, calls the GST verification provider, and returns a structured response.
Yes. New users can receive free trial credits or test-mode access so they can check the endpoint, request body, response format, and integration flow before purchasing paid credits.
Clients recharge credits in advance. Credits are deducted based on the final billing rule, such as successful GST verification, provider call, or response type. The deduction rule can be configured by the admin.
Usage logs can show timestamp, GST number, business name, request mode, response status, HTTP status, credits deducted, client identity, and last usage details.
If the credit balance is insufficient, the API returns a structured error response and does not process chargeable GST verification until the client recharges credits.
Start verifying GST numbers today
Get free trial credits and integrate in minutes. No credit card required.
GST Verify
Enterprise-grade GST verification API platform by Rasonix Technologies. Secure, scalable, and developer-friendly.
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