diff --git a/astakosclient/astakosclient/__init__.py b/astakosclient/astakosclient/__init__.py
index 141b83df8f1a2a948647ac3b5dba96c1c2232def..f7a4a255c9d6532b0c602c8701dbd05180a3666e 100644
--- a/astakosclient/astakosclient/__init__.py
+++ b/astakosclient/astakosclient/__init__.py
@@ -825,11 +825,11 @@ class AstakosClient(object):
             filters["owner"] = owner
         if mode is not None:
             filters["mode"] = mode
+        path = self.api_projects
+        if filters:
+            path += "?" + urllib.urlencode(filters)
         req_headers = {'content-type': 'application/json'}
-        req_body = (parse_request({"filter": filters}, self.logger)
-                    if filters else None)
-        return self._call_astakos(self.api_projects,
-                                  headers=req_headers, body=req_body)
+        return self._call_astakos(path, headers=req_headers)
 
     # -----------------------------------------
     # do a GET to ``API_PROJECTS``/<project_id>
@@ -931,10 +931,13 @@ class AstakosClient(object):
         In case of success, return a list of membership descriptions.
         """
         req_headers = {'content-type': 'application/json'}
-        body = {"project": project} if project is not None else None
-        req_body = parse_request(body, self.logger) if body else None
-        return self._call_astakos(self.api_memberships,
-                                  headers=req_headers, body=req_body)
+        filters = {}
+        if project is not None:
+            filters["project"] = project
+        path = self.api_memberships
+        if filters:
+            path += '?' + urllib.urlencode(filters)
+        return self._call_astakos(path, headers=req_headers)
 
     # -----------------------------------------
     # do a GET to ``API_MEMBERSHIPS``/<memb_id>
diff --git a/snf-astakos-app/astakos/api/projects.py b/snf-astakos-app/astakos/api/projects.py
index c1589f2182b20a061b82b5d2b77c2a3363c65b32..68359c489a43b78604e459f7f033d092e92b44bf 100644
--- a/snf-astakos-app/astakos/api/projects.py
+++ b/snf-astakos-app/astakos/api/projects.py
@@ -279,9 +279,12 @@ def projects(request):
 @transaction.commit_on_success
 def get_projects(request):
     user = request.user
-    input_data = read_json_body(request, default={})
-    filters = input_data.get("filter", {})
-    mode = input_data.get("mode", "default")
+    filters = {}
+    for key in PROJECT_QUERY.keys():
+        value = request.GET.get(key)
+        if value is not None:
+            filters[key] = value
+    mode = request.GET.get("mode", "default")
     query = make_project_query(filters)
     projects = _get_projects(query, mode=mode, request_user=user)
     data = get_projects_details(projects, request_user=user)
@@ -619,8 +622,7 @@ def make_membership_query(input_data):
 @transaction.commit_on_success
 def get_memberships(request):
     user = request.user
-    input_data = read_json_body(request, default={})
-    query = make_membership_query(input_data)
+    query = make_membership_query(request.GET)
     memberships = _get_memberships(query, request_user=user)
     data = get_memberships_details(memberships, user)
     return json_response(data)