Solution, company, gst and msme checks

GST verification API for India: check a GSTIN and get the registration record

A GST verification API takes a 15-character GSTIN and returns the taxpayer's registration record, so lenders, marketplaces and procurement teams can confirm a business is registered and active before onboarding it.

Reviewed 13 Nov 20268 providers comparedAlso searched as: gst verification api india, gst validation api, gst check api, gst verification api cost

Short answer

IndiaCos GST API returns the registration record for a GSTIN: legal and trade name, PAN, constitution, status, registration date, principal address, filing history and the linked company. It costs INR 0.40 per successful call, with INR 50 free credit. Surepass, Sandbox and Signzy also sell GSTIN verification, without a public per-call price.

Checked against each provider's public pages on 13 Nov 2026 · How we score

Which API does a GST verification check?

IndiaCos GST API: 3 endpoints, INR 0.40 per successful call, INR 50 free credit.

The API for this

JurisGrid score 85 out of 100

IndiaCos GST API

JurisGrid score 85 of 100. ₹0.40 per successful call, ₹50 free credit.

Endpoint: GET https://indiacos.com/api/v1/gst/{gstin}GST registration by GSTIN, including return_filings and portal checks
Endpoint: GET https://indiacos.com/api/v1/pan/{pan}Every GST registration under one PAN
Endpoint: GET https://indiacos.com/api/v1/searchFind a GSTIN by business name, or look up a GSTIN, CIN or PAN directly
MCP URL: https://indiacos.com/mcp

Get API key Docs MCP setup

shell

curl -s -H "Authorization: Bearer $INDIACOS_API_KEY" \
  "https://indiacos.com/api/v1/gst/27AAOCM9194L2ZF"

What does it return?

6 fields, as documented by the provider.

Legal name, trade name, PAN, constitution and taxpayer type
Registration status, registration date and cancellation date
Principal place of business with city, district, state and pincode
Nature of business, core business activity code and tax jurisdiction
Aadhaar authentication, e-invoicing flag, turnover band and risk flags
return_filings (every GST return on record) and the linked company CIN

Who else sells a GST verification API in India?

8 providers compared on what they sell for this check, access and published price.

Provider	What they sell for this	Score	API	MCP	Price	Source
IndiaCos	IndiaCos GST API	85	Public REST API	Public MCP server	₹0.40 per successful call, ₹50 free credit	Source
Sandbox	Verify GSTIN, Search GSTIN, Search GSTIN by PAN and Track GST Returns endpoints	54	Public REST API	Not published	Not published	Sourceopens the source page
GSTIN API	GSTIN lookup API with 75 free lookups; credit packs at INR 0.40 to 0.80 per lookup before GST, no expiry	49	Public REST API	Not published	₹0.40 to 0.80 per lookup before GST	Sourceopens the source page
Attestr	GSTIN verification and contact lookup inside its Business KYC (KYB) APIs	40	Public REST API	Not published	Not published	Sourceopens the source page
Surepass	GST verification API, plus GST return status and GST monitoring APIs	36	Public REST API	Not published	Not published	Sourceopens the source page
Signzy	GST verification API in its KYB API marketplace	31	Public REST API	Not published	Not published	Sourceopens the source page
Masters India	GST verification API with Search GSTIN and Search by PAN, bulk GSTIN verification	26	API on request	Not published	Not published	Sourceopens the source page
Zoop	GST verification API that checks GSTIN validity and active status, with bulk checks	12	API on request	Not published	Not published	Sourceopens the source page

Swipe for more columns

"Not published" means the provider does not state this on a public page. It is not a judgement on the product.

When is it the right choice?

Vendor and supplier onboarding: confirm the GSTIN is active before creating the vendor

Good for

Vendor and supplier onboarding: confirm the GSTIN is active before creating the vendor
Marketplace and merchant KYB: match the GST legal name to the business name given
NBFC and bank business lending: read status, constitution and address of a borrower
Input tax credit checks: see whether a supplier's registration is still live

Limits

The public GST portal does not publish additional places of business, so additional_addresses is empty for now
Email and mobile are masked unless your key has contact access
A GSTIN not yet on record is read live from the portal while you wait (up to about 25 seconds); that 202 answer is not billed, so retry after the Retry-After delay
It reads portal data; it is not a legal opinion that the business is genuine

Frequently asked questions

What does a GST verification API return?

It returns the taxpayer record for a GSTIN: legal and trade name, PAN, constitution, taxpayer type, status, registration date, principal address and, with IndiaCos, the return filings on record and the linked company.

How much does a GST verification API cost?

IndiaCos charges INR 0.40 per successful call from a prepaid wallet, and new accounts get INR 50 free credit, about 125 calls. Errors such as 404 not found are not billed. Surepass, Sandbox, Signzy, Zoop and Attestr do not publish a per-call price; gstinapi.in publishes INR 0.40 to 0.80 per lookup before GST.

Is it enough to check the GSTIN format?

No. A GSTIN can pass the state code, PAN and check-digit test and still be cancelled or never issued. Look the number up and read its status.

Can an AI agent run this check?

Yes. IndiaCos runs an MCP server at https://indiacos.com/mcp, so assistants such as Claude, ChatGPT and Cursor can call the same lookups with an API key. Each successful call is billed at INR 0.40 like any other API call.

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