Offline Invoices List

GET /invoices/{environment}/offline

Returns the list of offline invoices (outage mode) for the given environment.

Path Parameters

Parameter	Type	Required	Description
environment	string	✅	test, demo or prod

Query Parameters

Parameter	Type	Default	Description
status	string	unsent	Status filter

Allowed status values

Value	Description
unsent	Default: includes pending, signed, error, processing
pending	Awaiting signature
signed	Signed, ready to send
error	With error
processing	Being processed
sent	Sent to KSeF
all	All statuses

Response 200

{
  "invoices": [
    {
      "id": "uuid",
      "invoiceNumber": "FV/2026/01/001",
      "issueDate": "2026-01-15",
      "buyerName": "Client ABC",
      "buyerNip": "1234567890",
      "netAmount": 1000.00,
      "grossAmount": 1230.00,
      "vatAmount": 230.00,
      "currency": "PLN",
      "status": "signed",
      "errorMessage": null,
      "ksefReferenceNumber": null,
      "qrLinkInvoice": "https://...",
      "qrLinkCertificate": "https://...",
      "createdAt": "2026-01-15 10:00:00"
    }
  ],
  "totalCount": 1
}

Field	Type	Description
invoices	array	List of offline invoices
totalCount	integer	Total number of invoices in the result

Offline invoice fields:

Field	Type	Description
id	string (uuid)	Offline invoice ID
invoiceNumber	string	Invoice number
issueDate	string	Issue date (YYYY-MM-DD)
buyerName	string	Buyer company name
buyerNip	string	Buyer NIP number
netAmount	number	Net amount
grossAmount	number	Gross amount
vatAmount	number	VAT amount
currency	string	Currency code
status	string	Invoice status: pending, signed, error, processing, sent
errorMessage	string | null	Error message (only when status is error)
ksefReferenceNumber	string | null	KSeF reference number (only after batch send)
qrLinkInvoice	string | null	QR verification URL for the invoice
qrLinkCertificate	string | null	QR verification URL for the certificate
createdAt	string	Creation date

Error Codes

Code	Description
401	Unauthorized