diff --git a/lib/modules/rclone.nix b/lib/modules/rclone.nix
index 239c949..c5194a3 100644
--- a/lib/modules/rclone.nix
+++ b/lib/modules/rclone.nix
@@ -4,10 +4,17 @@ let
   targetName = "rclone";
 
   mkProvider =
-    { secretLoader ? ({ ... }: ""), envLoader ? ({ ... }: { }), options ? {}, ... }: {
+    {
+        secretLoader ? ({ ... }: ""),
+        envLoader ? ({ ... }: { }),
+        configLoader ? ({ ... }: { }),
+        options ? {},
+        ...
+    }: {
       inherit
         secretLoader
         envLoader
+        configLoader
         options
       ;
     };
@@ -24,8 +31,37 @@ let
       inherit default;
     };
 
+  mkWebdavOptions = { vendorName }: {
+      username = lib.mkOption {
+        type = lib.types.str;
+        description = "The name of the user to log in to ${vendorName}.";
+      };
+
+      password = lib.mkOption {
+        type = lib.types.nullOr lib.types.str;
+        description = "The password for logging in to ${vendorName}.";
+      };
+
+      passwordFile = lib.mkOption {
+        type = lib.types.nullOr (lib.types.either lib.types.path lib.types.str);
+        description = "A path to a file to read the password from for logging in to ${vendorName}.";
+      };
+  };
+
+  mkOwncloudOptions =
+    { vendorName ? "Nextcloud" }: (mkWebdavOptions { inherit vendorName; }) // {
+      baseUrl = lib.mkOption {
+        type = lib.types.str;
+        description = "The base URL of the ${vendorName} server.";
+      };
+    };
+
   syncProviders = {
-    nextcloud = mkProvider {};
+    nextcloud = mkProvider {
+      options = lib.types.submodule (
+        (mkOwncloudOptions { }));
+    };
+
     proton = mkProvider {};
     manual = mkProvider {};
   };
@@ -45,6 +81,15 @@ let
           default = true;
         };
 
+        providerOptions = lib.mkOption {
+          description = "The options of the sync";
+          type = lib.types.oneOf [
+            (builtins.map
+              (provider: provider.options)
+              syncProviders)
+          ];
+        };
+
         systemdDependencies = mkSystemdDependencyOption {
           default = cfg.systemdDependencies;
         };
@@ -60,11 +105,18 @@ let
           description = "A script for loading secrets before launching the sync.";
           default = [];
         };
+
+        config = lib.mkOption {
+          type = lib.types.attrs;
+          description = "The rclone config to use for creating the mount.";
+          visible = false;
+        };
       };
 
       config = {
         environment = syncProviders.${config.type}.envLoader config;
         secretsScript = syncProviders.${config.type}.secretLoader config;
+        config = syncProviders.${config.type}.configLoader config;
       };
     });
 in {