diff --git a/api/ovdashboard_api/routers/_common.py b/api/ovdashboard_api/routers/_common.py
index ccbc6c2..2ea5373 100644
--- a/api/ovdashboard_api/routers/_common.py
+++ b/api/ovdashboard_api/routers/_common.py
@@ -14,11 +14,28 @@ class NameLister(Protocol):
         ...
 
 
+_RESPONSE_OK = {
+    status.HTTP_200_OK: {
+        "description": "Operation successful",
+    },
+}
+
+
 @dataclass(frozen=True)
 class FileNameLister:
     remote_path: str
     re: re.Pattern[str]
 
+    @property
+    def responses(self) -> dict:
+        return {
+            **_RESPONSE_OK,
+            status.HTTP_404_NOT_FOUND: {
+                "description": f"{self.remote_path!r} not found",
+                "content": None,
+            },
+        }
+
     async def __call__(self) -> Iterator[str]:
         try:
             file_names = await webdav_list(self.remote_path)
@@ -30,7 +47,7 @@ class FileNameLister:
             )
 
         except RemoteResourceNotFound:
-            return iter(())
+            raise HTTPException(status_code=status.HTTP_404_NOT_FOUND)
 
 
 @dataclass(frozen=True)
@@ -46,6 +63,17 @@ class CalendarNameLister:
 class PrefixFinder:
     lister: NameLister
 
+    @property
+    def responses(self) -> dict:
+        return {
+            **_RESPONSE_OK,
+            status.HTTP_404_NOT_FOUND: {
+                "description": "Failure in lister " +
+                repr(self.lister.__class__.__name__),
+                "content": None,
+            },
+        }
+
     async def __call__(self, prefix: str) -> Iterator[str]:
         return (
             file_name
@@ -61,9 +89,7 @@ class PrefixUnique:
     @property
     def responses(self) -> dict:
         return {
-            status.HTTP_200_OK: {
-                "description": "Operation successful",
-            },
+            **_RESPONSE_OK,
             status.HTTP_404_NOT_FOUND: {
                 "description": "Prefix not found",
                 "content": None,
diff --git a/api/ovdashboard_api/routers/image.py b/api/ovdashboard_api/routers/image.py
index 8a30600..ec8fe62 100644
--- a/api/ovdashboard_api/routers/image.py
+++ b/api/ovdashboard_api/routers/image.py
@@ -23,14 +23,22 @@ _finder = PrefixFinder(_lister)
 _unique = PrefixUnique(_finder)
 
 
-@router.get("/list", response_model=list[str])
+@router.get(
+    "/list",
+    response_model=list[str],
+    responses=_lister.responses,
+)
 async def list_images(
     names: Iterator[str] = Depends(_lister),
 ) -> list[str]:
     return list(names)
 
 
-@router.get("/find/{prefix}", response_model=list[str])
+@router.get(
+    "/find/{prefix}",
+    response_model=list[str],
+    responses=_finder.responses,
+)
 async def find_images(
     names: Iterator[str] = Depends(_finder),
 ) -> list[str]:
diff --git a/api/ovdashboard_api/routers/text.py b/api/ovdashboard_api/routers/text.py
index 683a250..168eb2a 100644
--- a/api/ovdashboard_api/routers/text.py
+++ b/api/ovdashboard_api/routers/text.py
@@ -55,14 +55,22 @@ async def get_ticker_content(
     )
 
 
-@router.get("/list", response_model=list[str])
+@router.get(
+    "/list",
+    response_model=list[str],
+    responses=_lister.responses,
+)
 async def list_texts(
     names: Iterator[str] = Depends(_lister),
 ) -> list[str]:
     return list(names)
 
 
-@router.get("/find/{prefix}", response_model=list[str])
+@router.get(
+    "/find/{prefix}",
+    response_model=list[str],
+    responses=_finder.responses,
+)
 async def find_texts(
     names: Iterator[str] = Depends(_finder),
 ) -> list[str]: