diff --git a/internal/grpc/services/gateway/storageprovider.go b/internal/grpc/services/gateway/storageprovider.go
index 21fbcb2a3ea..14065545b86 100644
--- a/internal/grpc/services/gateway/storageprovider.go
+++ b/internal/grpc/services/gateway/storageprovider.go
@@ -115,37 +115,118 @@ func (s *svc) CreateStorageSpace(ctx context.Context, req *provider.CreateStorag
 
 func (s *svc) ListStorageSpaces(ctx context.Context, req *provider.ListStorageSpacesRequest) (*provider.ListStorageSpacesResponse, error) {
 	log := appctx.GetLogger(ctx)
-	// TODO: needs to be fixed
 	var id *provider.StorageSpaceId
 	for _, f := range req.Filters {
 		if f.Type == provider.ListStorageSpacesRequest_Filter_TYPE_ID {
 			id = f.GetId()
 		}
 	}
-	parts := strings.SplitN(id.OpaqueId, "!", 2)
-	if len(parts) != 2 {
-		return &provider.ListStorageSpacesResponse{
-			Status: status.NewInvalidArg(ctx, "space id must be separated by !"),
-		}, nil
+
+	var providers []*registry.ProviderInfo
+	var err error
+	c, err := pool.GetStorageRegistryClient(s.c.StorageRegistryEndpoint)
+	if err != nil {
+		return nil, errors.Wrap(err, "gateway: error getting storage registry client")
 	}
-	c, err := s.find(ctx, &provider.Reference{ResourceId: &provider.ResourceId{
-		StorageId: parts[0], // FIXME REFERENCE the StorageSpaceId is a storageid + an opaqueid
-		OpaqueId:  parts[1],
-	}})
+
+	if id != nil {
+		// query that specific story provider
+		parts := strings.SplitN(id.OpaqueId, "!", 2)
+		if len(parts) != 2 {
+			return &provider.ListStorageSpacesResponse{
+				Status: status.NewInvalidArg(ctx, "space id must be separated by !"),
+			}, nil
+		}
+		res, err := c.GetStorageProviders(ctx, &registry.GetStorageProvidersRequest{
+			Ref: &provider.Reference{ResourceId: &provider.ResourceId{
+				StorageId: parts[0], // FIXME REFERENCE the StorageSpaceId is a storageid + an opaqueid
+				OpaqueId:  parts[1],
+			}},
+		})
+		if err != nil {
+			return &provider.ListStorageSpacesResponse{
+				Status: status.NewStatusFromErrType(ctx, "ListStorageSpaces filters: req "+req.String(), err),
+			}, nil
+		}
+		if res.Status.Code != rpc.Code_CODE_OK {
+			return &provider.ListStorageSpacesResponse{
+				Status: res.Status,
+			}, nil
+		}
+		providers = res.Providers
+	} else {
+		// get list of all storage providers
+		res, err := c.ListStorageProviders(ctx, &registry.ListStorageProvidersRequest{})
+
+		if err != nil {
+			return &provider.ListStorageSpacesResponse{
+				Status: status.NewStatusFromErrType(ctx, "error listing providers", err),
+			}, nil
+		}
+		if res.Status.Code != rpc.Code_CODE_OK {
+			return &provider.ListStorageSpacesResponse{
+				Status: res.Status,
+			}, nil
+		}
+
+		providers = []*registry.ProviderInfo{}
+		// FIXME filter only providers that have an id set ... currently none have?
+		// bug? only ProviderPath is set
+		for i := range res.Providers {
+			// use only providers whose path does not start with a /?
+			if strings.HasPrefix(res.Providers[i].ProviderPath, "/") {
+				continue
+			}
+			providers = append(providers, res.Providers[i])
+		}
+	}
+
+	spacesFromProviders := make([][]*provider.StorageSpace, len(providers))
+	errors := make([]error, len(providers))
+	var wg sync.WaitGroup
+
+	for i, p := range providers {
+		wg.Add(1)
+		go s.listStorageSpacesOnProvider(ctx, req, &spacesFromProviders[i], p, &errors[i], &wg)
+	}
+	wg.Wait()
+
+	uniqueSpaces := map[string]*provider.StorageSpace{}
+	for i := range providers {
+		if errors[i] != nil {
+			log.Debug().Err(errors[i]).Msg("skipping provider")
+			continue
+		}
+		for j := range spacesFromProviders[i] {
+			uniqueSpaces[spacesFromProviders[i][j].Id.OpaqueId] = spacesFromProviders[i][j]
+		}
+	}
+	spaces := []*provider.StorageSpace{}
+	for spaceID := range uniqueSpaces {
+		spaces = append(spaces, uniqueSpaces[spaceID])
+	}
+
+	return &provider.ListStorageSpacesResponse{
+		Status:        status.NewOK(ctx),
+		StorageSpaces: spaces,
+	}, nil
+}
+
+func (s *svc) listStorageSpacesOnProvider(ctx context.Context, req *provider.ListStorageSpacesRequest, res *[]*provider.StorageSpace, p *registry.ProviderInfo, e *error, wg *sync.WaitGroup) {
+	defer wg.Done()
+	c, err := s.getStorageProviderClient(ctx, p)
 	if err != nil {
-		return &provider.ListStorageSpacesResponse{
-			Status: status.NewStatusFromErrType(ctx, "error finding path", err),
-		}, nil
+		*e = errors.Wrap(err, "error connecting to storage provider="+p.Address)
+		return
 	}
 
-	res, err := c.ListStorageSpaces(ctx, req)
+	r, err := c.ListStorageSpaces(ctx, req)
 	if err != nil {
-		log.Err(err).Msg("gateway: error listing storage space on storage provider")
-		return &provider.ListStorageSpacesResponse{
-			Status: status.NewInternal(ctx, err, "error calling ListStorageSpaces"),
-		}, nil
+		*e = errors.Wrap(err, "gateway: error calling ListStorageSpaces")
+		return
 	}
-	return res, nil
+
+	*res = r.StorageSpaces
 }
 
 func (s *svc) UpdateStorageSpace(ctx context.Context, req *provider.UpdateStorageSpaceRequest) (*provider.UpdateStorageSpaceResponse, error) {
diff --git a/internal/grpc/services/storageprovider/storageprovider.go b/internal/grpc/services/storageprovider/storageprovider.go
index b3ab295260c..d3b435a196c 100644
--- a/internal/grpc/services/storageprovider/storageprovider.go
+++ b/internal/grpc/services/storageprovider/storageprovider.go
@@ -451,6 +451,8 @@ func (s *service) ListStorageSpaces(ctx context.Context, req *provider.ListStora
 			st = status.NewNotFound(ctx, "not found when listing spaces")
 		case errtypes.PermissionDenied:
 			st = status.NewPermissionDenied(ctx, err, "permission denied")
+		case errtypes.NotSupported:
+			st = status.NewUnimplemented(ctx, err, "not implemented")
 		default:
 			st = status.NewInternal(ctx, err, "error listing spaces")
 		}