Summary: this service is stateless and stores nothing. No database, no accounts, no cookies, no analytics.
Request parameters — amounts, item descriptions, buyer NIP and name, and your bring-your-own KSeF credentials (x-ksef-token, x-ksef-nip) sent as HTTP headers — are used in memory only to build the FA(3) invoice and forward it to the government KSeF API (Krajowy System e-Faktur, Ministry of Finance), then discarded. Invoice data is processed and stored by KSeF under the merchant's own taxpayer context and never persisted by this service. The host (Vercel) keeps short-lived HTTP logs per its privacy policy; credential headers are never logged by the application.
Because nothing is stored, there is nothing to delete or export.
Contact: reports@wishpool.app · Source (MIT): github.com/junter1989k-ai/poland-invoice-mcp