diff --git a/python/PyQt6/server/auto_generated/qgscapabilitiescache.sip.in b/python/PyQt6/server/auto_generated/qgscapabilitiescache.sip.in
index 55f3f1db35a6..249c4c584275 100644
--- a/python/PyQt6/server/auto_generated/qgscapabilitiescache.sip.in
+++ b/python/PyQt6/server/auto_generated/qgscapabilitiescache.sip.in
@@ -39,9 +39,11 @@ Inserts new capabilities document (creates a copy of the document, does not take
 :param doc: the DOM document
 %End
 
+  public slots:
+
     void removeCapabilitiesDocument( const QString &path );
 %Docstring
-Remove capabilities document
+Removes capabilities document
 
 :param path: the project file path
 %End
diff --git a/python/PyQt6/server/auto_generated/qgsconfigcache.sip.in b/python/PyQt6/server/auto_generated/qgsconfigcache.sip.in
index a1ed747f785f..145e0cc54a21 100644
--- a/python/PyQt6/server/auto_generated/qgsconfigcache.sip.in
+++ b/python/PyQt6/server/auto_generated/qgsconfigcache.sip.in
@@ -78,6 +78,15 @@ Initialize from settings
 %End
 
 
+  signals:
+
+    void projectRemovedFromCache( const QString &path );
+%Docstring
+Emitted whenever a project is removed from the cache.
+
+.. versionadded:: 3.38
+%End
+
   private:
     QgsConfigCache();
   public slots:
diff --git a/python/server/auto_generated/qgscapabilitiescache.sip.in b/python/server/auto_generated/qgscapabilitiescache.sip.in
index 55f3f1db35a6..249c4c584275 100644
--- a/python/server/auto_generated/qgscapabilitiescache.sip.in
+++ b/python/server/auto_generated/qgscapabilitiescache.sip.in
@@ -39,9 +39,11 @@ Inserts new capabilities document (creates a copy of the document, does not take
 :param doc: the DOM document
 %End
 
+  public slots:
+
     void removeCapabilitiesDocument( const QString &path );
 %Docstring
-Remove capabilities document
+Removes capabilities document
 
 :param path: the project file path
 %End
diff --git a/python/server/auto_generated/qgsconfigcache.sip.in b/python/server/auto_generated/qgsconfigcache.sip.in
index a1ed747f785f..145e0cc54a21 100644
--- a/python/server/auto_generated/qgsconfigcache.sip.in
+++ b/python/server/auto_generated/qgsconfigcache.sip.in
@@ -78,6 +78,15 @@ Initialize from settings
 %End
 
 
+  signals:
+
+    void projectRemovedFromCache( const QString &path );
+%Docstring
+Emitted whenever a project is removed from the cache.
+
+.. versionadded:: 3.38
+%End
+
   private:
     QgsConfigCache();
   public slots:
diff --git a/src/server/qgscapabilitiescache.h b/src/server/qgscapabilitiescache.h
index cea69332b5ef..7ea9a0560444 100644
--- a/src/server/qgscapabilitiescache.h
+++ b/src/server/qgscapabilitiescache.h
@@ -53,8 +53,10 @@ class SERVER_EXPORT QgsCapabilitiesCache : public QObject
      */
     void insertCapabilitiesDocument( const QString &configFilePath, const QString &key, const QDomDocument *doc );
 
+  public slots:
+
     /**
-     * Remove capabilities document
+     * Removes capabilities document
      * \param path the project file path
      */
     void removeCapabilitiesDocument( const QString &path );
diff --git a/src/server/qgsconfigcache.cpp b/src/server/qgsconfigcache.cpp
index 9c0728c96602..6731eb6fab81 100644
--- a/src/server/qgsconfigcache.cpp
+++ b/src/server/qgsconfigcache.cpp
@@ -249,6 +249,8 @@ void QgsConfigCache::removeEntry( const QString &path )
   mXmlDocumentCache.remove( path );
 
   mStrategy->entryRemoved( path );
+
+  emit projectRemovedFromCache( path );
 }
 
 // slots
diff --git a/src/server/qgsconfigcache.h b/src/server/qgsconfigcache.h
index 00fe0adcdf88..b0910a34320a 100644
--- a/src/server/qgsconfigcache.h
+++ b/src/server/qgsconfigcache.h
@@ -128,6 +128,14 @@ class SERVER_EXPORT QgsConfigCache : public QObject
     //! Initialize with a strategy implementation.
     QgsConfigCache( QgsAbstractCacheStrategy *strategy ) SIP_SKIP;
 
+  signals:
+
+    /**
+     * Emitted whenever a project is removed from the cache.
+     * \since QGIS 3.38
+     */
+    void projectRemovedFromCache( const QString &path );
+
   private:
     // SIP require this
     QgsConfigCache() SIP_FORCE;
diff --git a/src/server/qgsserver.cpp b/src/server/qgsserver.cpp
index 37cb497b60ef..52475fb5d5c3 100644
--- a/src/server/qgsserver.cpp
+++ b/src/server/qgsserver.cpp
@@ -368,6 +368,8 @@ bool QgsServer::init()
   // Initialize config cache
   QgsConfigCache::initialize( sSettings );
 
+  QObject::connect( QgsConfigCache::instance(), &QgsConfigCache::projectRemovedFromCache, sCapabilitiesCache, &QgsCapabilitiesCache::removeCapabilitiesDocument );
+
   sInitialized = true;
   QgsMessageLog::logMessage( QStringLiteral( "Server initialized" ), QStringLiteral( "Server" ), Qgis::MessageLevel::Info );
   return true;