Business & GST Verification APIs

GST Advance Verification API

Verify GSTIN details, registration status and filing history against GSTN records.

What it verifies

Verifies a GSTIN and returns the business's registration details, current status and recent return-filing history from GSTN records, so you can vet a business before onboarding it.

Who uses it

Lenders and NBFCs onboarding MSME borrowers
B2B marketplaces and procurement teams onboarding vendors
Finance and compliance teams checking supplier registration before payment
Trade-finance and invoice-discounting platforms

Request and response

POSThttps://verification.techinnoverz.com/api/v1/business-gst/gst-advance

Verify a GSTIN and fetch registration status and filing history. This call is billed when it returns a successful result.

Request body

gstinstringrequired

15-character GSTIN.

referenceIdstringoptional

Your own id, echoed back in the response for reconciliation.

Example requests

curl -X POST "https://verification.techinnoverz.com/api/v1/business-gst/gst-advance" \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "gstin": "22AAAAA0000A1Z5",
  "referenceId": "app_20915"
}'

const res = await fetch("https://verification.techinnoverz.com/api/v1/business-gst/gst-advance", {
  method: "POST",
  headers: {
    "x-api-key": "YOUR_API_KEY",
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "gstin": "22AAAAA0000A1Z5",
    "referenceId": "app_20915"
  }),
});
const result = await res.json();

import requests

res = requests.post(
    "https://verification.techinnoverz.com/api/v1/business-gst/gst-advance",
    headers={"x-api-key": "YOUR_API_KEY"},
    json={
        "gstin": "22AAAAA0000A1Z5",
        "referenceId": "app_20915",
    },
    timeout=15,
)
result = res.json()

200 response — status "found"

Response

{
  "status": "found",
  "data": {
    "gstin": "22AAAAA0000A1Z5",
    "legalName": "Sample Enterprises Private Limited",
    "tradeName": "Sample Enterprises",
    "registrationStatus": "Active",
    "registrationDate": "2018-07-01",
    "filingHistory": [
      {
        "period": "082026",
        "returnType": "GSTR-3B",
        "filedOn": "2026-09-18",
        "status": "Filed"
      }
    ]
  },
  "source": "provider",
  "dataAsOf": "2026-11-03T09:30:00.000Z",
  "referenceId": "app_20915",
  "billing": {
    "charged": true,
    "walletBalance": "12450.00"
  },
  "txnId": "txn_8c31ba90",
  "livemode": true
}

Fields returned in data

gstinstringoptional

The GSTIN that was verified.

legalNamestringoptional

Legal name of the business.

tradeNamestringoptional

Trade name of the business.

registrationStatusstringoptional

Registration status, for example Active.

registrationDatestringoptional

Date of registration, YYYY-MM-DD.

filingHistoryarrayoptional

Recent return filings.

Error codes

Errors return a non-200 HTTP status and the same envelope, so your retry logic and your reconciliation agree.

400 INVALID_INPUT

A field is missing or malformed. The details list each problem. Not charged.

401 INVALID_KEY

The key is missing, revoked, or not a key we issued.

402 WALLET_EMPTY

Your available balance is below the price of this call. Top up and retry. Not charged.

403 PRODUCTION_NOT_ENABLED

A live key was used before live access was enabled for your account. Use a test key, or ask us to enable live access.

403 TEST_NOT_ENABLED

A test key was used before test (UAT) access was enabled for your account. Ask us to enable it.

403 API_NOT_ENABLED

This check is switched off for your account, or is not available for live use yet.

403 IP_NOT_ALLOWED

The key is restricted to certain IP addresses and this call came from another.

403 ACCOUNT_SUSPENDED

The account is suspended. Contact support.

404 NO_DATA

A valid request, but no record was found. Not charged.

404 ROUTE_NOT_FOUND

There is no endpoint at that path.

405 METHOD_NOT_ALLOWED

Use the method shown in the Allow header.

409 IDEMPOTENCY_IN_PROGRESS

A call with the same Idempotency-Key is still being processed. Retry after the delay in Retry-After.

413 PAYLOAD_TOO_LARGE

The request body is too large. Not charged.

415 UNSUPPORTED_MEDIA_TYPE

Send the request with Content-Type: application/json.

422 IDEMPOTENCY_KEY_REUSED

This Idempotency-Key was already used with a different request body. Use a new key for a new request.

429 RATE_LIMITED

Too many requests or too many at once. Wait for the Retry-After delay.

500 INTERNAL_ERROR

Something went wrong on our side. Not charged. Quote the txnId if you contact support.

502 SOURCE_ERROR

The data source returned an error. Not charged.

503 SOURCE_DOWN

The data source is unavailable right now. Not charged. Retry after the delay in Retry-After.

504 SOURCE_TIMEOUT

The data source did not answer in time. Not charged.

Error response

{
  "status": "error",
  "error": {
    "code": "NO_DATA",
    "message": "No record found for the given input. Not charged."
  },
  "billing": {
    "charged": false
  },
  "txnId": "txn_8c31ba91",
  "livemode": true
}

Billing

You are charged only on successful hits. Failed, no-data and error calls are free.

Every response carries billing.charged and your remaining billing.walletBalance. Per-hit pricing is set on your rate card; book a demo to get yours.

All API documentation · OpenAPI specification · Docs as plain text