The WireMock server records all requests it receives in memory (at least until it is reset). This makes it possible to verify that a request matching a specific pattern was received, and also to fetch the requests’ details.

Verifying and querying requests relies on the request journal, which is an in-memory log of received requests. This can be disabled for load testing - see the Configuration section for details.

Like stubbing, verification also uses WireMock’s Request Matching system to filter and query requests.

https://wiremock.org/docs/verifying/