diff --git a/src/server/qgsserverogcapi.cpp b/src/server/qgsserverogcapi.cpp
@@ -16,6 +16,7 @@
 
 #include <QDir>
 #include <QDebug>
+#include <QtGlobal>
 
 #include "qgsserverogcapi.h"
 #include "qgsserverogcapihandler.h"
@@ -68,7 +69,17 @@ void QgsServerOgcApi::registerHandler( QgsServerOgcApiHandler *handler )
 
 QUrl QgsServerOgcApi::sanitizeUrl( const QUrl &url )
 {
+#if QT_VERSION >= QT_VERSION_CHECK(5, 13, 0)
+  // Since QT 13 NormalizePathSegments does not collapse double slashes
+  QUrl u { url.adjusted( QUrl::StripTrailingSlash | QUrl::NormalizePathSegments ) };
+  while ( u.path().contains( QLatin1String( "//" ) ) )
+  {
+    u.setPath( u.path().replace( QLatin1String( "//" ), QChar( '/' ) ) );
+  }
+  return u;
+#else
   return url.adjusted( QUrl::StripTrailingSlash | QUrl::NormalizePathSegments );
+#endif
 }
 
 void QgsServerOgcApi::executeRequest( const QgsServerApiContext &context ) const

diff --git a/src/server/qgsserverogcapihandler.cpp b/src/server/qgsserverogcapihandler.cpp
@@ -303,7 +303,7 @@ void QgsServerOgcApiHandler::htmlDump( const json &data, const QgsServerApiConte
       QFileInfo fi{ url.path() };
       auto suffix { fi.suffix() };
       auto fName { fi.filePath()};
-      if ( suffix.length() != 0 )
+      if ( !suffix.isEmpty() )
       {
         fName.chop( suffix.length() + 1 );
       }

diff --git a/src/server/qgsserverrequest.cpp b/src/server/qgsserverrequest.cpp
@@ -34,6 +34,12 @@ QgsServerRequest::QgsServerRequest( const QUrl &url, Method method, const Header
   mParams.load( QUrlQuery( url ) );
 }
 
+QString QgsServerRequest::methodToString( const QgsServerRequest::Method &method )
+{
+  static QMetaEnum metaEnum = QMetaEnum::fromType<QgsServerRequest::Method>();
+  return QString( metaEnum.valueToKey( method ) ).remove( QStringLiteral( "Method" ) ).toUpper( );
+}
+
 QString QgsServerRequest::header( const QString &name ) const
 {
   return mHeaders.value( name );

diff --git a/src/server/qgsserverrequest.h b/src/server/qgsserverrequest.h
@@ -37,6 +37,8 @@
 
 class SERVER_EXPORT QgsServerRequest
 {
+    Q_GADGET
+
   public:
 
     typedef QMap<QString, QString> Parameters;
@@ -51,8 +53,10 @@ class SERVER_EXPORT QgsServerRequest
       PutMethod,
       GetMethod,
       PostMethod,
-      DeleteMethod
+      DeleteMethod,
+      PatchMethod
     };
+    Q_ENUM( Method )
 
 
     /**
@@ -81,6 +85,13 @@ class SERVER_EXPORT QgsServerRequest
     //! destructor
     virtual ~QgsServerRequest() = default;
 
+    /**
+     * Returns a string representation of an HTTP request \a method.
+     * \since QGIS 3.12
+     */
+    static QString methodToString( const Method &method );
+
+
     /**
      * \returns  the request url as seen by QGIS server
      *

diff --git a/src/server/services/wfs3/qgswfs3handlers.cpp b/src/server/services/wfs3/qgswfs3handlers.cpp
diff --git a/src/server/services/wfs3/qgswfs3handlers.h b/src/server/services/wfs3/qgswfs3handlers.h
@@ -23,11 +23,12 @@
 
 class QgsFeatureRequest;
 class QgsServerOgcApi;
+class QgsFeature;
 
 /**
  * The QgsWfs3AbstractItemsHandler class provides some
  * functionality which is common to the handlers that
- * return items.
+ * return or process items.
  */
 class QgsWfs3AbstractItemsHandler: public QgsServerOgcApiHandler
 {
@@ -41,10 +42,10 @@ class QgsWfs3AbstractItemsHandler: public QgsServerOgcApiHandler
      * \param context the server api context
      * \throws QgsServerApiNotFoundException if the layer is NOT published
      */
-    void checkLayerIsAccessible( const QgsVectorLayer *layer, const QgsServerApiContext &context ) const;
+    void checkLayerIsAccessible( QgsVectorLayer *layer, const QgsServerApiContext &context ) const;
 
     /**
-     * Creates a filtered QgsFeatureRequest containing only fields published for WMS and plugin filters applied.
+     * Creates a filtered QgsFeatureRequest containing only fields published for WFS and plugin filters applied.
      * \param layer the vector layer
      * \param context the server api context
      * \param subsetAttributes optional list of field names requested by the client, if empty all published attributes will be added to the request
@@ -53,10 +54,10 @@ class QgsWfs3AbstractItemsHandler: public QgsServerOgcApiHandler
     QgsFeatureRequest filteredRequest( const QgsVectorLayer *layer, const QgsServerApiContext &context, const QStringList &subsetAttributes = QStringList() ) const;
 
     /**
-     * Returns a filtered list of fields containing only fields published for WMS and plugin filters applied.
-     * @param layer the vector layer
-     * @param context the server api context
-     * @return QgsFields list with filters applied
+     * Returns a filtered list of fields containing only fields published for WFS and plugin filters applied.
+     * \param layer the vector layer
+     * \param context the server api context
+     * \return QgsFields list with filters applied
      */
     QgsFields publishedFields( const QgsVectorLayer *layer, const QgsServerApiContext &context ) const;
 
@@ -75,9 +76,9 @@ class QgsWfs3APIHandler: public QgsWfs3AbstractItemsHandler
     void handleRequest( const QgsServerApiContext &context ) const override;
     QRegularExpression path() const override { return QRegularExpression( R"re(/api)re" ); }
     std::string operationId() const override { return "getApiDescription"; }
-    std::string summary() const override { return "The API definition"; }
+    std::string summary() const override { return "The API description"; }
     std::string description() const override { return "The formal documentation of this API according to the OpenAPI specification, version 3.0. I.e., this document."; }
-    std::string linkTitle() const override { return "API definition"; }
+    std::string linkTitle() const override { return "API description"; }
     QStringList tags() const override { return { QStringLiteral( "Capabilities" ) }; }
     QgsServerOgcApi::Rel linkType() const override { return QgsServerOgcApi::Rel::service_desc; }
     json schema( const QgsServerApiContext &context ) const override;
@@ -149,11 +150,11 @@ class QgsWfs3ConformanceHandler: public QgsServerOgcApiHandler
     // QgsServerOgcApiHandler interface
     QRegularExpression path() const override { return QRegularExpression( R"re(/conformance)re" ); }
     std::string operationId() const override { return "getRequirementClasses"; }
-    std::string summary() const override { return "Information about standards that this API conforms to"; }
+    std::string summary() const override { return "Information about standards that this API conforms to."; }
     std::string description() const override
     {
       return "List all requirements classes specified in a standard (e.g., WFS 3.0 "
-             "Part 1: Core) that the server conforms to";
+             "Part 1: Core) that the server conforms to.";
     }
     QStringList tags() const override { return { QStringLiteral( "Capabilities" ) }; }
     std::string linkTitle() const override { return "WFS 3.0 conformance classes"; }
@@ -204,7 +205,7 @@ class QgsWfs3DescribeCollectionHandler: public QgsWfs3AbstractItemsHandler
 
     QRegularExpression path() const override { return QRegularExpression( R"re(/collections/(?<collectionId>[^/]+?)(\.json|\.html)?$)re" ); }
     std::string operationId() const override { return "describeCollection"; }
-    std::string summary() const override { return "Describe the feature collection"; }
+    std::string summary() const override { return "Describe the feature collection with ID {collectionId}."; }
     std::string description() const override { return "Metadata about a feature collection."; }
     std::string linkTitle() const override { return "Feature collection"; }
     QStringList tags() const override { return { QStringLiteral( "Capabilities" ) }; }
@@ -223,7 +224,7 @@ class QgsWfs3CollectionsItemsHandler: public QgsWfs3AbstractItemsHandler
     void handleRequest( const QgsServerApiContext &context ) const override;
     QRegularExpression path() const override { return QRegularExpression( R"re(/collections/(?<collectionId>[^/]+)/items(\.geojson|\.json|\.html)?$)re" ); }
     std::string operationId() const override { return "getFeatures"; }
-    std::string summary() const override { return "Retrieve features of feature collection collectionId"; }
+    std::string summary() const override { return "Retrieve features of feature collection {collectionId}."; }
     std::string description() const override
     {
       return "Every feature in a dataset belongs to a collection. A dataset may "
@@ -252,8 +253,8 @@ class QgsWfs3CollectionsFeatureHandler: public QgsWfs3AbstractItemsHandler
     void handleRequest( const QgsServerApiContext &context ) const override;
     QRegularExpression path() const override { return QRegularExpression( R"re(/collections/(?<collectionId>[^/]+)/items/(?<featureId>[^/]+?)(\.json|\.geojson|\.html)?$)re" ); }
     std::string operationId() const override { return "getFeature"; }
-    std::string description() const override { return "Retrieve a feature; use content negotiation or specify a file extension to request HTML (.html or GeoJSON (.json)"; }
-    std::string summary() const override { return "Retrieve a single feature"; }
+    std::string description() const override { return "Retrieve a feature with ID {featureId} from the collection with ID {collectionId}; use content negotiation or specify a file extension to request HTML (.html or GeoJSON (.json)."; }
+    std::string summary() const override { return "Retrieve a single feature with ID {featureId} from the collection with ID {collectionId}."; }
     std::string linkTitle() const override { return "Retrieve a feature"; }
     QStringList tags() const override { return { QStringLiteral( "Features" ) }; }
     QgsServerOgcApi::Rel linkType() const override { return QgsServerOgcApi::Rel::data; }

diff --git a/tests/src/python/test_qgsserver_api.py b/tests/src/python/test_qgsserver_api.py
diff --git a/tests/testdata/qgis_server/api/test_wfs3_api_project.json b/tests/testdata/qgis_server/api/test_wfs3_api_project.json
diff --git a/tests/testdata/qgis_server/api/test_wfs3_collection_points_timefilters.json b/tests/testdata/qgis_server/api/test_wfs3_collection_points_timefilters.json
@@ -45,13 +45,13 @@ Content-Type: application/json
     {
       "href": "http://server.qgis.org/wfs3/collections/points/items.json",
       "rel": "items",
-      "title": "points",
-      "type": "application/json"
+      "title": "points items as GEOJSON",
+      "type": "application/geo+json"
     },
     {
       "href": "http://server.qgis.org/wfs3/collections/points/items.html",
       "rel": "items",
-      "title": "points",
+      "title": "points items as HTML",
       "type": "text/html"
     },
     {

diff --git a/tests/testdata/qgis_server/api/test_wfs3_collection_testlayer_èé.html b/tests/testdata/qgis_server/api/test_wfs3_collection_testlayer_èé.html
@@ -15,9 +15,23 @@
     <script src="https://code.jquery.com/jquery-3.4.1.min.js"
             integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo="
             crossorigin="anonymous"></script>
-    <link rel="stylesheet" href="/wfs3/static/jsonFormatter.min.css" crossorigin="anonymous"></script>
+    <link rel="stylesheet" href="/wfs3/static/jsonFormatter.min.css" crossorigin="anonymous">
     <script src="/wfs3/static/jsonFormatter.min.js" crossorigin="anonymous"></script>
 
+    <!-- template for the WFS3 API links list, to be included in HEAD -->
+
+    <link rel="alternate" href="http://server.qgis.org/wfs3/collections/testlayer%20%C3%A8%C3%A9.json" title="Feature collection as JSON" type="application/json">
+
+    <link rel="self" href="http://server.qgis.org/wfs3/collections/testlayer%20%C3%A8%C3%A9.html" title="Feature collection as HTML" type="text/html">
+
+    <link rel="items" href="http://server.qgis.org/wfs3/collections/testlayer%20%C3%A8%C3%A9/items.json" title="A test vector layer èé items as GEOJSON" type="application/geo+json">
+
+    <link rel="items" href="http://server.qgis.org/wfs3/collections/testlayer%20%C3%A8%C3%A9/items.html" title="A test vector layer èé items as HTML" type="text/html">
+
+    <link rel="describedBy" href="http://server.qgis.org/?request=DescribeFeatureType&typenames=testlayer%20èé&service=WFS&version=2.0" title="Schema for A test vector layer èé" type="application/xml">
+
+
+
     <title>A test vector layer èé</title>
   </head>
   <body>
@@ -86,6 +100,29 @@ <h3>Extent</h3>
             <dt>44.901482526001836</dt>
         </dl>
 
+        <h3>Links</h3>
+            <ul>
+
+
+                <li><a rel="alternate" href="http://server.qgis.org/wfs3/collections/testlayer%20%C3%A8%C3%A9.json">Feature collection as JSON</a></li>
+
+
+
+
+
+                <li><a rel="items" href="http://server.qgis.org/wfs3/collections/testlayer%20%C3%A8%C3%A9/items.json">A test vector layer èé items as GEOJSON</a></li>
+
+
+
+                <li><a rel="items" href="http://server.qgis.org/wfs3/collections/testlayer%20%C3%A8%C3%A9/items.html">A test vector layer èé items as HTML</a></li>
+
+
+
+                <li><a rel="describedBy" href="http://server.qgis.org/?request=DescribeFeatureType&typenames=testlayer%20èé&service=WFS&version=2.0">Schema for A test vector layer èé</a></li>
+
+
+            </ul>
+
     </div>
 
     <div class="col-md-6">

diff --git a/tests/testdata/qgis_server/api/test_wfs3_collection_testlayer_èé.json b/tests/testdata/qgis_server/api/test_wfs3_collection_testlayer_èé.json
@@ -40,13 +40,13 @@ Content-Type: application/json
     {
       "href": "http://server.qgis.org/wfs3/collections/testlayer%20%C3%A8%C3%A9/items.json",
       "rel": "items",
-      "title": "A test vector layer èé",
-      "type": "application/json"
+      "title": "A test vector layer èé items as GEOJSON",
+      "type": "application/geo+json"
     },
     {
       "href": "http://server.qgis.org/wfs3/collections/testlayer%20%C3%A8%C3%A9/items.html",
       "rel": "items",
-      "title": "A test vector layer èé",
+      "title": "A test vector layer èé items as HTML",
       "type": "text/html"
     },
     {

diff --git a/tests/testdata/qgis_server/api/test_wfs3_collections_empty.html b/tests/testdata/qgis_server/api/test_wfs3_collections_empty.html
@@ -15,9 +15,17 @@
     <script src="https://code.jquery.com/jquery-3.4.1.min.js"
             integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo="
             crossorigin="anonymous"></script>
-    <link rel="stylesheet" href="/wfs3/static/jsonFormatter.min.css" crossorigin="anonymous"></script>
+    <link rel="stylesheet" href="/wfs3/static/jsonFormatter.min.css" crossorigin="anonymous">
     <script src="/wfs3/static/jsonFormatter.min.js" crossorigin="anonymous"></script>
 
+    <!-- template for the WFS3 API links list, to be included in HEAD -->
+
+    <link rel="alternate" href="http://server.qgis.org/wfs3/collections.json" title="Feature collections as JSON" type="application/json">
+
+    <link rel="self" href="http://server.qgis.org/wfs3/collections.html" title="Feature collections as HTML" type="text/html">
+
+
+
     <title>Feature collections</title>
   </head>
   <body>

diff --git a/tests/testdata/qgis_server/api/test_wfs3_collections_project.html b/tests/testdata/qgis_server/api/test_wfs3_collections_project.html
@@ -15,9 +15,17 @@
     <script src="https://code.jquery.com/jquery-3.4.1.min.js"
             integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo="
             crossorigin="anonymous"></script>
-    <link rel="stylesheet" href="/wfs3/static/jsonFormatter.min.css" crossorigin="anonymous"></script>
+    <link rel="stylesheet" href="/wfs3/static/jsonFormatter.min.css" crossorigin="anonymous">
     <script src="/wfs3/static/jsonFormatter.min.js" crossorigin="anonymous"></script>
 
+    <!-- template for the WFS3 API links list, to be included in HEAD -->
+
+    <link rel="alternate" href="http://server.qgis.org/wfs3/collections.json" title="Feature collections as JSON" type="application/json">
+
+    <link rel="self" href="http://server.qgis.org/wfs3/collections.html" title="Feature collections as HTML" type="text/html">
+
+
+
     <title>Feature collections</title>
   </head>
   <body>

diff --git a/tests/testdata/qgis_server/api/test_wfs3_landing_page.html b/tests/testdata/qgis_server/api/test_wfs3_landing_page.html
@@ -15,9 +15,23 @@
     <script src="https://code.jquery.com/jquery-3.4.1.min.js"
             integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo="
             crossorigin="anonymous"></script>
-    <link rel="stylesheet" href="/wfs3/static/jsonFormatter.min.css" crossorigin="anonymous"></script>
+    <link rel="stylesheet" href="/wfs3/static/jsonFormatter.min.css" crossorigin="anonymous">
     <script src="/wfs3/static/jsonFormatter.min.js" crossorigin="anonymous"></script>
 
+    <!-- template for the WFS3 API links list, to be included in HEAD -->
+
+    <link rel="alternate" href="http://server.qgis.org/wfs3.json" title="Landing page as JSON" type="application/json">
+
+    <link rel="self" href="http://server.qgis.org/wfs3.html" title="Landing page as HTML" type="text/html">
+
+    <link rel="data" href="http://server.qgis.org/wfs3/collections" title="Feature collections" type="application/json">
+
+    <link rel="conformance" href="http://server.qgis.org/wfs3/conformance" title="Conformance classes" type="application/json">
+
+    <link rel="service-desc" href="http://server.qgis.org/wfs3/api" title="API description" type="application/openapi+json;version=3.0">
+
+
+
     <title>Landing page</title>
   </head>
   <body>
@@ -63,13 +77,13 @@ <h2>Available services</h2>
 
 
 
-        <li><a rel="conformance" href="http://server.qgis.org/wfs3/conformance">WFS 3.0 conformance classes</a></li>
+        <li><a rel="conformance" href="http://server.qgis.org/wfs3/conformance">Conformance classes</a></li>
 
 
 
 
 
-        <li><a rel="service-desc" href="http://server.qgis.org/wfs3/api">API definition</a></li>
+        <li><a rel="service-desc" href="http://server.qgis.org/wfs3/api">API description</a></li>
 
 
 

diff --git a/tests/testdata/qgis_server/api/test_wfs3_landing_page.json b/tests/testdata/qgis_server/api/test_wfs3_landing_page.json
@@ -23,13 +23,13 @@ Content-Type: application/json
     {
       "href": "http://server.qgis.org/wfs3/conformance",
       "rel": "conformance",
-      "title": "WFS 3.0 conformance classes",
+      "title": "Conformance classes",
       "type": "application/json"
     },
     {
       "href": "http://server.qgis.org/wfs3/api",
       "rel": "service-desc",
-      "title": "API definition",
+      "title": "API description",
       "type": "application/openapi+json;version=3.0"
     }
   ],

diff --git a/tests/testdata/qgis_server/test_project_api_editing.gpkg b/tests/testdata/qgis_server/test_project_api_editing.gpkg
diff --git a/tests/testdata/qgis_server/test_project_api_editing.qgs b/tests/testdata/qgis_server/test_project_api_editing.qgs