IRN Lookup API

Fetch a registered e-invoice using its IRN.

From ₹3.00/callPrepaid · billed per successful call

What the IRN Lookup API does

Retrieve an e-invoice that has already been registered, using its IRN. Used to confirm a supplier’s invoice is genuinely registered before claiming input tax credit against it — a check that is far cheaper than discovering the problem at filing. Calls carry your own GST portal API credentials (GSTIN, username and password), so filings are made as you, on your own registration. We never file on our own account.

Popular use cases

→Verifying a supplier invoice is registered before claiming input credit
→Reconciling purchase records against the invoice registration portal
→Audit and compliance tooling checking historic registrations

Request

curl -X POST https://apisathi.in/gw/v1/einvoice-get-by-irn-v1/ \
  -H "X-API-Key: live_xxx" \
  -H "Content-Type: application/json" \
  -d '{ "gstin": "23BEFPJ5660F2ZP", "username": "your_portal_user", "password": "•••", "query_string": "irn=a5c…" }'

Response

{
  "success": true,
  "data": { "Irn": "a5c…", "AckNo": 112010036356, "Status": "ACT" }
}

Frequently asked questions

Why look up an IRN I did not create?

To confirm a supplier’s invoice is really registered. An unregistered invoice cannot support an input tax credit claim, and finding out at filing time is expensive.

Can I look up an invoice from its document number instead?

Yes — there is a separate endpoint that finds the IRN from document type, number and date.

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