Masters India is an established GST Suvidha Provider that sells a full suite of GST APIs through a callback from its team. gstinapi.in is a self-serve API with a published price list. Here is what each side shows publicly.
| Masters India | gstinapi.in | |
|---|---|---|
| Free trial | A free single search on its web tool. Bulk verification needs a purchase. | Up to 75 free lookups — 10 on signup and 65 more across three setup steps. Never expire. |
| Price per lookup | No per-lookup price shown on its GST API pages. | ₹0.40 to ₹0.80, by pack. ₹0.40 on the 6,250-credit pack. |
| How you get pricing | Request a callback; its team supplies credentials. | Published, self-serve. Buy a pack, no sales call. |
| Return-filing data | Listed as Track Return and filing preference APIs. No price shown. | Yes — GET /v1/gstin/{gstin}/returns lists every GSTR-1 and GSTR-3B filed in a financial year with dates and ARNs; /compliance summarises it; /filing-preference gives the QRMP cadence. |
| Integration | Public API docs and a wider suite covering filing, e-invoice and e-way bill APIs. | One header (x-api-key), official Node.js and Python libraries, OpenAPI spec, a free test GSTIN that never spends a credit. |
Masters India details are what its own page states, read on November 1, 2026; where the page shows nothing we say so rather than guess. Source: www.mastersindia.co/gst-number-verification-api-bulk-utility/. Providers change their pricing — check with them before committing volume, and tell us if anything here is out of date.
The fastest honest comparison is your own vendor list through both. Sign up, copy the key and run this. The test GSTIN 00AAAAA0000A1ZT returns a fixed response and never spends a credit.
curl "https://www.gstinapi.in/v1/gstin/22AAAAA0000A1Z5" \ -H "x-api-key: gak_your_api_key"
No credit card. Credits never expire.
Not on the pages we read on November 1, 2026. Its GST verification page offers a callback, and its team supplies credentials. gstinapi.in publishes its rates: ₹0.40 to ₹0.80 per lookup depending on the pack, prepaid, with the lowest rate on the 6,250-credit pack. Prices exclude 18% GST.
Its page describes a free single search on the web tool and says bulk verification needs a purchase. gstinapi.in gives up to 75 free API lookups with no card, and the credits never expire.
Yes. The returns endpoint lists every GSTR-1 and GSTR-3B filed in a financial year with filing dates and ARNs, the compliance endpoint summarises it, and the filing-preference endpoint gives the monthly or quarterly cadence. All use the same key and credits as a lookup.
When you want a full GSP suite and a team to set it up with you, especially for filing and e-invoicing across a large business. gstinapi.in suits teams that want published prices and a key today.
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