Fehlercodes · ksef · Polen

KSEF-21121Teilweise

KSeF rate limit reached for this endpoint

So lautet die Ablehnung wörtlich: „[KSEF-21121] KSeF error 21121 ("Limit żądań osiągnięty") is returned when the calling context exceeds the per-endpoint request quota published by the Polish Ministry of Finance. The API rejects the request with HTTP 429 and the client must back off before retrying. Quotas are applied per NIP context, per endpoint, and per time window.“

The Ministry publishes current limits at https://ksef-test.mf.gov.pl/document/LimitValues/1.3/PL. Limits differ between environments (test vs production) and between endpoints — /online/Session/AuthorisationChallenge, /online/Invoice/Send, /online/Query/Invoice/Sync, and batch endpoints each have their own bucket. The response includes a Retry-After header when a wait time is defined.

Was Sie bereithaltenDie korrekten Werte aus Ihrer Buchhaltung; wir zeigen Ihnen, welche Stelle betroffen ist.
Was wir tunImplement client-side rate limiting with the published per-endpoint quotas, honour the Retry-After header, and stagger bulk workloads across multiple contexts or across time. Do not retry immediately.
So sieht der Befund ausBeispiel
BefundPrüfung nötig · KSEF-21121
Von IhnenDie korrekten Werte
DanachErneute Prüfung
NachweisSHA-256 und /verify-Link nach der Prüfung
Tritt oft zusammen auf
KSEF-21116KSeF authentication token is invalidKSEF-21170KSeF interactive session has expiredKSEF-21301Missing authorization for this KSeF operation