diff --git a/src/bonsai/bonsai/bim/module/bsdd/ui.py b/src/bonsai/bonsai/bim/module/bsdd/ui.py
index c6966c01d8..f49f48abb9 100644
--- a/src/bonsai/bonsai/bim/module/bsdd/ui.py
+++ b/src/bonsai/bonsai/bim/module/bsdd/ui.py
@@ -83,7 +83,6 @@ class BIM_PT_bsdd(Panel):
             row = self.layout.row()
             row.operator("bim.load_bsdd_dictionaries")
 
-
 class BIM_UL_bsdd_dictionaries(UIList):
     def draw_item(
         self,
diff --git a/src/bonsai/bonsai/bim/module/pset/ui.py b/src/bonsai/bonsai/bim/module/pset/ui.py
index 03d6f8bb36..addd03a504 100644
--- a/src/bonsai/bonsai/bim/module/pset/ui.py
+++ b/src/bonsai/bonsai/bim/module/pset/ui.py
@@ -262,7 +262,7 @@ class BIM_PT_object_psets(Panel):
 
         row = self.layout.row(align=True)
         prop_with_search(row, props, "pset_name", text="")
-        if props.pset_name != "BBIM_BSDD" and not props.pset_name.startswith(tool.Bsdd.identifier_url):
+        if props.pset_name != "BBIM_BSDD" and not props.pset_name.startswith(tool.Bsdd.identifier_url()):
             op = row.operator("bim.add_pset", icon="ADD", text="")
             op.obj = obj.name
             op.obj_type = "Object"
diff --git a/src/bonsai/bonsai/tool/bsdd.py b/src/bonsai/bonsai/tool/bsdd.py
index 47c948abcc..74d9926f15 100644
--- a/src/bonsai/bonsai/tool/bsdd.py
+++ b/src/bonsai/bonsai/tool/bsdd.py
@@ -36,11 +36,23 @@ if TYPE_CHECKING:
 
 
 class Bsdd(bonsai.core.tool.Bsdd):
-    identifier_url = "https://identifier.buildingsmart.org"
+    default_identifier_url = "https://identifier.buildingsmart.org"
+    default_api_url = "https://api.bsdd.buildingsmart.org/api/"
     client = bsdd.Client()
     bsdd_classes: dict[str, dict] = {}
     bsdd_properties: dict[str, dict] = {}
 
+    @classmethod
+    def identifier_url(cls) -> str:
+        """Derives the identifier base URL from the current client baseurl.
+        Falls back to the standard bSDD identifier URL when using the default API."""
+        if cls.client.baseurl == cls.default_api_url:
+            return cls.default_identifier_url
+        from urllib.parse import urlparse
+
+        parsed = urlparse(cls.client.baseurl)
+        return f"{parsed.scheme}://{parsed.netloc}"
+
     @classmethod
     def get_bsdd_props(cls) -> BIMBSDDProperties:
         assert (scene := bpy.context.scene)
@@ -269,7 +281,7 @@ class Bsdd(bonsai.core.tool.Bsdd):
         for obj in tool.Blender.get_selected_objects(include_active=True):
             if element := tool.Ifc.get_entity(obj):
                 for reference in ifcopenshell.util.classification.get_references(element):
-                    if (uri := reference.Location) and uri.startswith(cls.identifier_url):
+                    if (uri := reference.Location) and uri.startswith(cls.identifier_url()):
                         classes.add((reference[1] or reference[2] or "Unnamed", uri))
 
         dictionary_uris = (
@@ -383,7 +395,7 @@ class Bsdd(bonsai.core.tool.Bsdd):
     def get_applicable_psets(cls, element: ifcopenshell.entity_instance):
         uris = set()
         for reference in ifcopenshell.util.classification.get_references(element):
-            if (uri := reference.Location) and uri.startswith(cls.identifier_url):
+            if (uri := reference.Location) and uri.startswith(cls.identifier_url()):
                 uris.add(uri)
         psets = set()
         for uri in uris:
@@ -399,7 +411,7 @@ class Bsdd(bonsai.core.tool.Bsdd):
     def is_applicable(cls, pset_uri: str, element: ifcopenshell.entity_instance) -> bool:
         uris = set()
         for reference in ifcopenshell.util.classification.get_references(element):
-            if (uri := reference.Location) and uri.startswith(cls.identifier_url):
+            if (uri := reference.Location) and uri.startswith(cls.identifier_url()):
                 uris.add(uri)
         class_uri, pset_name = pset_uri.rsplit("#", 1)
         return class_uri in uris