Feature:

* Add param to only return the value of an aggregate by its key

src/aleph/web/controllers/aggregates.py

@@ -19,6 +19,7 @@ class AggregatesQueryParams(BaseModel):
     keys: Optional[List[str]] = None
     limit: int = DEFAULT_LIMIT
     with_info: bool = False
+    only_value: bool = False
 
     @validator(
         "keys",
@@ -67,10 +68,19 @@ async def address_aggregate(request: web.Request) -> web.Response:
     if not aggregates:
         raise web.HTTPNotFound(text="No aggregate found for this address")
 
+    if query_params.only_value and len(query_params.keys) == 1:
+        output = {}
+        target_key = query_params.keys[0]
+        for result in aggregates:
+            output[result[0]] = result[1]
+
+        return web.json_response(output[target_key])
+
     output = {
         "address": address,
         "data": {},
     }
+
     info: Dict = {}
     data: Dict = {}