diff --git a/reana_commons/openapi_specifications/reana_server.json b/reana_commons/openapi_specifications/reana_server.json
index 3001071d..44ff2d15 100644
--- a/reana_commons/openapi_specifications/reana_server.json
+++ b/reana_commons/openapi_specifications/reana_server.json
@@ -2,7 +2,7 @@
   "info": {
     "description": "Submit workflows to be run on REANA Cloud",
     "title": "REANA Server",
-    "version": "0.9.1a3"
+    "version": "0.95.0a1"
   },
   "paths": {
     "/account/settings/linkedaccounts/": {},
@@ -148,12 +148,87 @@
       "get": {
         "description": "Retrieve projects from GitLab.",
         "operationId": "gitlab_projects",
+        "parameters": [
+          {
+            "description": "The API access_token of the current user.",
+            "in": "query",
+            "name": "access_token",
+            "required": false,
+            "type": "string"
+          },
+          {
+            "description": "The search string to filter the project list.",
+            "in": "query",
+            "name": "search",
+            "required": false,
+            "type": "string"
+          },
+          {
+            "description": "Results page number (pagination).",
+            "in": "query",
+            "name": "page",
+            "required": false,
+            "type": "integer"
+          },
+          {
+            "description": "Number of results per page (pagination).",
+            "in": "query",
+            "name": "size",
+            "required": false,
+            "type": "integer"
+          }
+        ],
         "produces": [
           "application/json"
         ],
         "responses": {
           "200": {
-            "description": "This resource return all projects owned by the user on GitLab in JSON format."
+            "description": "This resource return all projects owned by the user on GitLab in JSON format.",
+            "schema": {
+              "properties": {
+                "has_next": {
+                  "type": "boolean"
+                },
+                "has_prev": {
+                  "type": "boolean"
+                },
+                "items": {
+                  "items": {
+                    "properties": {
+                      "hook_id": {
+                        "type": "integer",
+                        "x-nullable": true
+                      },
+                      "id": {
+                        "type": "integer"
+                      },
+                      "name": {
+                        "type": "string"
+                      },
+                      "path": {
+                        "type": "string"
+                      },
+                      "url": {
+                        "type": "string"
+                      }
+                    },
+                    "type": "object"
+                  },
+                  "type": "array"
+                },
+                "page": {
+                  "type": "integer"
+                },
+                "size": {
+                  "type": "integer"
+                },
+                "total": {
+                  "type": "integer",
+                  "x-nullable": true
+                }
+              },
+              "type": "object"
+            }
           },
           "403": {
             "description": "Request failed. User token not valid.",
@@ -366,6 +441,13 @@
                   "title": "Default workspace",
                   "value": "/usr/share"
                 },
+                "interactive_session_recommended_jupyter_images": {
+                  "title": "Recommended jupyter images for interactive sessions",
+                  "value": [
+                    "docker.io/jupyter/scipy-notebook:notebook-6.4.5",
+                    "docker.io/jupyter/scipy-notebook:notebook-9.4.5"
+                  ]
+                },
                 "kubernetes_max_memory_limit": {
                   "title": "Maximum allowed memory limit for Kubernetes jobs",
                   "value": "10Gi"
@@ -441,6 +523,20 @@
                   },
                   "type": "object"
                 },
+                "interactive_session_recommended_jupyter_images": {
+                  "properties": {
+                    "title": {
+                      "type": "string"
+                    },
+                    "value": {
+                      "items": {
+                        "type": "string"
+                      },
+                      "type": "array"
+                    }
+                  },
+                  "type": "object"
+                },
                 "kubernetes_max_memory_limit": {
                   "properties": {
                     "title": {