Summary: this service is stateless and stores nothing. No database, no accounts, no cookies, no analytics.
Request parameters — amounts, item names, buyer name and 사업자번호, and your bring-your-own POPBiLL/Linkhub credentials (x-popbill-linkid, x-popbill-secretkey, x-popbill-corpnum) sent as HTTP headers — are used in memory only to mint a Linkhub session token (HMAC-SHA256) and forward the 전자세금계산서 issue/query/transmit call to the POPBiLL / Linkhub API, then discarded. The SecretKey is used to sign the token request in memory; the session token is never cached. None of these values are persisted. Your 공동인증서 (certificate) stays on your own POPBiLL account and never passes through this service. Invoice data is processed and stored by POPBiLL and 국세청 (National Tax Service) under the merchant's own tax 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/korea-invoice-mcp