GST Advance Verification
Verify a GSTIN and get filing status, returns history and compliance signals in one call.
What is the GST Advance Verification?
The BILAPI GST Advance Verification API goes beyond a basic GSTIN check to return filing status, return-filing history and compliance signals — so you can assess how active and compliant a business really is before extending credit or terms.
It is used by lenders, invoice-discounting and B2B credit platforms to turn a GSTIN into a risk signal: a business that files GST returns on time is a lower-risk counterparty than one that is dormant or non-compliant.
Send a 15-character GSTIN and receive detailed business and compliance data as JSON. Billed only on a successful lookup.
What the GST Advance Verification returns
Every successful call returns a clean, predictable JSON envelope. The data object includes the fields below (exact fields vary by record availability).
| Field | Description |
|---|---|
gstin | The GSTIN that was checked. |
legal_name | Legal name of the business. |
registration_status | Active, cancelled or suspended status. |
filing_status | Whether GST returns are being filed and how recently. |
return_history | Recent GST return-filing history, where available. |
compliance_rating | Compliance signal derived from filing behaviour, where available. |
Sample request & response
Call the endpoint with your API key in the X-Bilapi-Api-Key header. The same request shape works in the free sandbox and in production.
POST https://api.bilapi.com/v1/gst-advance-verification
X-Bilapi-Api-Key: <your_api_key>
Content-Type: application/json
{
"gstin": "27ABCDE1234F1Z5"
}{
"status_code": 200,
"success": true,
"message": "GSTIN verified",
"data": {
"gstin": "27ABCDE1234F1Z5",
"legal_name": "ACME TRADING PRIVATE LIMITED",
"registration_status": "Active",
"filing_status": "Regular filer",
"compliance_rating": "Good"
}
}Key features
Real-time results
Sub-300ms median response so GST checks never slow your onboarding funnel.
Predictable JSON
The same clean response envelope as every BILAPI endpoint — parse once, reuse everywhere.
Only pay for hits
Invalid inputs and failed lookups are never charged to your wallet.
Secure by design
TLS 1.3 in transit, PII tokenisation at rest and a full audit log on every request.
One key, every API
Sandbox to production on a single key — no per-vendor contracts or integrations.
Built to scale
99.9% uptime target with bulk and webhook-friendly workflows for high volume.
Where it's used
Customer onboarding
Auto-fill and validate identity during signup to cut drop-off and manual review.
Lending & underwriting
Add a verified data point to credit decisions and reduce first-party fraud.
Fraud & risk
Flag mismatches and synthetic identities before they enter your system.
Compliance & audit
Keep a tamper-evident trail of every verification for KYC/AML reviews.
How it works
Create a free account
Sign up on the BILAPI console and get a live API key instantly.
Send a request
POST the required GST fields to the endpoint with your API key in the header.
Get structured JSON
Receive a clean, predictable JSON response in milliseconds.
Plug into your flow
Drop the result straight into onboarding, underwriting or risk decisioning.
Frequently asked questions
How is advance verification different from basic GST verification?
Basic verification returns the business name and registration status; advance verification adds filing status, return history and compliance signals so you can judge how active and compliant the business is.
Why use GST filing status as a risk signal?
A business that files GST returns regularly is a lower-risk counterparty than one that is dormant or non-compliant, which matters for lending and B2B credit decisions.
What is the input?
A single 15-character GSTIN, for example 27ABCDE1234F1Z5.
Who uses this API?
Lenders, invoice-discounting and B2B credit platforms use it to turn a GSTIN into a usable risk and compliance signal.
Is a sandbox available?
Yes — a free sandbox is included with every account.
Related Business Verification KYB
Start verifying with BILAPI
One key, a free sandbox and a predictable JSON envelope across every endpoint.