diff --git a/webknossos/webknossos/annotation/annotation.py b/webknossos/webknossos/annotation/annotation.py
index c7f8f44cc..920540798 100644
--- a/webknossos/webknossos/annotation/annotation.py
+++ b/webknossos/webknossos/annotation/annotation.py
@@ -1520,6 +1520,7 @@ def _set_annotation_info(
                 modified=annotation_info.modified,
                 data_store=annotation_info.data_store,
                 tracing_time=annotation_info.tracing_time,
+                annotation_layers=None,
             ),
         )
 
@@ -1528,6 +1529,36 @@ def save(self, path: str | PathLike) -> None:
             "Remote annotations cannot be saved. Changes are applied ."
         )
 
+    def get_segments_for_agglomerate(self, agglomerate_id: int) -> list[int] | None:
+        """Get the segment ids for a given agglomerate id.
+
+        Args:
+            agglomerate_id (int): The agglomerate id.
+
+        Returns:
+            List[int] | None: The segment ids if the agglomerate was edited, None otherwise.
+        """
+        from ..client.context import _get_context
+
+        context = _get_context()
+        annotation_info = self._get_annotation_info()
+        assert annotation_info.annotation_layers is not None, "Annotation has no layers"
+        tracingstore_client = context.get_tracingstore_api_client()
+        volume_layer = [
+            layer
+            for layer in annotation_info.annotation_layers
+            if layer.typ == "Volume"
+        ]
+        assert len(volume_layer) == 1, "Expected exactly one volume layer"
+        segment_list_result = tracingstore_client.get_segments_for_agglomerate(
+            volume_layer[0].tracing_id, agglomerate_id
+        )
+        segment_list = segment_list_result.segmentIds
+        if segment_list_result.agglomerateIdIsPresent:
+            return segment_list
+        else:
+            return None
+
     def download_mesh(
         self,
         segment_id: int,
diff --git a/webknossos/webknossos/client/api_client/models.py b/webknossos/webknossos/client/api_client/models.py
index 299056fc6..049b60a7d 100644
--- a/webknossos/webknossos/client/api_client/models.py
+++ b/webknossos/webknossos/client/api_client/models.py
@@ -357,6 +357,19 @@ class ApiProjectCreate:
     owner: str | None = None
 
 
+@attr.s(auto_attribs=True)
+class ApiAnnotationLayer:
+    tracing_id: str
+    typ: str
+    name: str
+
+
+@attr.s(auto_attribs=True)
+class ApiEditableMappingSegmentListResult:
+    segmentIds: list[int]
+    agglomerateIdIsPresent: bool
+
+
 @attr.s(auto_attribs=True)
 class ApiAnnotation:
     id: str
@@ -366,6 +379,7 @@ class ApiAnnotation:
     description: str
     state: str
     modified: int
+    annotation_layers: list[ApiAnnotationLayer] | None
     data_store: ApiDataStore | None = None
     tracing_time: int | None = None  # millis
 
diff --git a/webknossos/webknossos/client/api_client/tracingstore_api_client.py b/webknossos/webknossos/client/api_client/tracingstore_api_client.py
index 103d19e76..8b22be557 100644
--- a/webknossos/webknossos/client/api_client/tracingstore_api_client.py
+++ b/webknossos/webknossos/client/api_client/tracingstore_api_client.py
@@ -2,6 +2,7 @@
 
 from webknossos.client.api_client.models import (
     ApiAdHocMeshInfo,
+    ApiEditableMappingSegmentListResult,
     ApiPrecomputedMeshInfo,
 )
 
@@ -26,6 +27,16 @@ def __init__(
     def url_prefix(self) -> str:
         return f"{self.base_url}/tracings"
 
+    def get_segments_for_agglomerate(
+        self, tracing_id: str, agglomerate_id: int
+    ) -> ApiEditableMappingSegmentListResult:
+        route = f"/mapping/{tracing_id}/segmentsForAgglomerate"
+        query: Query = {"agglomerateId": agglomerate_id}
+
+        return self._get_json(
+            route, query=query, response_type=ApiEditableMappingSegmentListResult
+        )
+
     def annotation_download_mesh(
         self,
         mesh: ApiPrecomputedMeshInfo | ApiAdHocMeshInfo,