diff --git a/api/ovdashboard_api/routers/v1/_common.py b/api/ovdashboard_api/routers/v1/_common.py
index 4d3ec6c..abfbaf1 100644
--- a/api/ovdashboard_api/routers/v1/_common.py
+++ b/api/ovdashboard_api/routers/v1/_common.py
@@ -18,7 +18,6 @@ from ...core.webdav import WebDAV
 
 _logger = getLogger(__name__)
 
-
 _RESPONSE_OK = {
     status.HTTP_200_OK: {
         "description": "Operation successful",
@@ -31,13 +30,19 @@ Return = TypeVar("Return")
 
 @dataclass(slots=True, frozen=True)
 class Dependable[**Params, Return]:
-    func: Callable[Params, Return]
+    func: Callable[Params, Awaitable[Return]]
     responses: dict
 
+    async def __call__(self, *args: Params.args, **kwds: Params.kwargs) -> Return:
+        return await self.func(*args, **kwds)
+
+
+type _NDependable[Return] = Dependable[[], Return]
+
 
 def get_remote_path(
     path_name: str,
-) -> Dependable[[], Awaitable[str]]:
+) -> _NDependable[str]:
     async def _get_remote_path() -> str:
         cfg = await get_config()
         return getattr(cfg, path_name)
@@ -52,7 +57,7 @@ def list_files(
     *,
     path_name: str,
     re: re.Pattern[str],
-) -> Dependable[[], Awaitable[list[str]]]:
+) -> _NDependable[list[str]]:
     """
     List files in remote `path` matching the RegEx `re`
     """
@@ -100,8 +105,8 @@ def list_files(
 
 
 def filter_prefix(
-    src: Callable[[], Awaitable[list[str]]],
-) -> Dependable[[str], Awaitable[list[str]]]:
+    src: _NDependable[list[str]],
+) -> Dependable[[str], list[str]]:
     """
     Filter names from an async source `src` for names starting with a given prefix.
     """
@@ -118,7 +123,7 @@ def filter_prefix(
         responses={
             **_RESPONSE_OK,
             status.HTTP_404_NOT_FOUND: {
-                "description": f"Failure in lister {src.__name__!r}",
+                "description": f"Failure in lister {src.__class__.__name__!r}",
                 "content": None,
             },
         },
@@ -126,8 +131,8 @@ def filter_prefix(
 
 
 def filter_prefix_unique(
-    src: Callable[[str], Awaitable[list[str]]],
-) -> Dependable[[str], Awaitable[str]]:
+    src: Dependable[[str], list[str]],
+) -> Dependable[[str], str]:
     """
     Determines if a given prefix is unique in the list produced by the async source `src`.
 
diff --git a/api/ovdashboard_api/routers/v1/file.py b/api/ovdashboard_api/routers/v1/file.py
index 1fc3932..6d83091 100644
--- a/api/ovdashboard_api/routers/v1/file.py
+++ b/api/ovdashboard_api/routers/v1/file.py
@@ -33,15 +33,15 @@ _ls = list_files(
 )
 
 _rp = get_remote_path(path_name=_PATH_NAME)
-_fp = filter_prefix(_ls.func)
-_fpu = filter_prefix_unique(_fp.func)
+_fp = filter_prefix(_ls)
+_fpu = filter_prefix_unique(_fp)
 
 
 @router.on_event("startup")
 async def start_router() -> None:
     _logger.debug(f"{router.prefix} router starting.")
 
-    remote_path = await _rp.func()
+    remote_path = await _rp()
     if not webdav_ensure_path(remote_path):
         webdav_ensure_files(
             remote_path,
diff --git a/api/ovdashboard_api/routers/v1/image.py b/api/ovdashboard_api/routers/v1/image.py
index 145b400..5345d80 100644
--- a/api/ovdashboard_api/routers/v1/image.py
+++ b/api/ovdashboard_api/routers/v1/image.py
@@ -33,15 +33,15 @@ _ls = list_files(
 )
 
 _rp = get_remote_path(path_name=_PATH_NAME)
-_fp = filter_prefix(_ls.func)
-_fpu = filter_prefix_unique(_fp.func)
+_fp = filter_prefix(_ls)
+_fpu = filter_prefix_unique(_fp)
 
 
 @router.on_event("startup")
 async def start_router() -> None:
     _logger.debug(f"{router.prefix} router starting.")
 
-    remote_path = await _rp.func()
+    remote_path = await _rp()
     if not webdav_ensure_path(remote_path):
         webdav_ensure_files(
             remote_path,
diff --git a/api/ovdashboard_api/routers/v1/text.py b/api/ovdashboard_api/routers/v1/text.py
index 9a1c239..91aa0a2 100644
--- a/api/ovdashboard_api/routers/v1/text.py
+++ b/api/ovdashboard_api/routers/v1/text.py
@@ -31,15 +31,15 @@ _ls = list_files(
 )
 
 _rp = get_remote_path(path_name=_PATH_NAME)
-_fp = filter_prefix(_ls.func)
-_fpu = filter_prefix_unique(_fp.func)
+_fp = filter_prefix(_ls)
+_fpu = filter_prefix_unique(_fp)
 
 
 @router.on_event("startup")
 async def start_router() -> None:
     _logger.debug(f"{router.prefix} router starting.")
 
-    remote_path = await _rp.func()
+    remote_path = await _rp()
     if not webdav_ensure_path(remote_path):
         webdav_ensure_files(
             remote_path,
diff --git a/api/ovdashboard_api/routers/v1/ticker.py b/api/ovdashboard_api/routers/v1/ticker.py
index bb59b62..7c2e04a 100644
--- a/api/ovdashboard_api/routers/v1/ticker.py
+++ b/api/ovdashboard_api/routers/v1/ticker.py
@@ -26,7 +26,7 @@ router = APIRouter(prefix="/ticker", tags=["text"])
 async def start_router() -> None:
     _logger.debug(f"{router.prefix} router starting.")
 
-    remote_path = await _rp.func()
+    remote_path = await _rp()
     if not webdav_ensure_path(remote_path):
         webdav_ensure_files(
             remote_path,
@@ -36,8 +36,8 @@ async def start_router() -> None:
 
 async def get_ticker_lines() -> Iterator[str]:
     cfg = await get_config()
-    file_name = await _fpu.func(cfg.ticker.file_name)
-    remote_path = await _rp.func()
+    file_name = await _fpu(cfg.ticker.file_name)
+    remote_path = await _rp()
 
     ticker = await WebDAV.read_str(f"{remote_path}/{file_name}")