diff --git a/src/presa_mano/clients/open3dmodel.py b/src/presa_mano/clients/open3dmodel.py
index 2beea4f..206e5e6 100644
--- a/src/presa_mano/clients/open3dmodel.py
+++ b/src/presa_mano/clients/open3dmodel.py
@@ -59,10 +59,24 @@ class Open3DModelClient:
             body = r.json()
         except ValueError as e:
             raise Open3DModelUnavailable(f"non-JSON response: {e}") from e
-        if not isinstance(body, list):
-            raise Open3DModelError("UNEXPECTED_PAYLOAD",
-                                   f"expected list, got {type(body).__name__}")
-        return body
+        # Open3DModel wraps list responses in the {success, data, error} envelope
+        # too; older mocks may return a bare list. Accept either shape.
+        if isinstance(body, dict) and "success" in body:
+            if not body.get("success"):
+                err = body.get("error") or {}
+                raise Open3DModelError(
+                    str(err.get("code") or "UNKNOWN"),
+                    str(err.get("message") or "no message"),
+                )
+            data = body.get("data")
+            if not isinstance(data, list):
+                raise Open3DModelError("UNEXPECTED_PAYLOAD",
+                                       f"expected list in data, got {type(data).__name__}")
+            return data
+        if isinstance(body, list):
+            return body
+        raise Open3DModelError("UNEXPECTED_PAYLOAD",
+                               f"expected list or envelope, got {type(body).__name__}")
 
     def estimate_pose(self, recipe_id: str, points_cv_m: np.ndarray,
                       intrinsics: dict[str, Any]) -> dict[str, Any]:
diff --git a/tests/test_open3dmodel_client.py b/tests/test_open3dmodel_client.py
index 868c84d..a7971ed 100644
--- a/tests/test_open3dmodel_client.py
+++ b/tests/test_open3dmodel_client.py
@@ -59,6 +59,18 @@ def test_list_recipes_happy_path():
     assert headers.get("X-Api-Key") == "K"
 
 
+def test_list_recipes_envelope_shape():
+    """Open3DModel wraps /api/recipes in {success, data, error}."""
+    body = {"success": True,
+            "data": [{"id": "abc", "name": "P2", "symmetry_type": "cylindrical"}],
+            "error": None}
+    response = httpx.Response(200, json=body)
+    client = Open3DModelClient("http://o3d:8878", api_key="K", timeout_s=2.0)
+    with patch("httpx.Client.get", return_value=response):
+        recs = client.list_recipes()
+    assert recs == body["data"]
+
+
 def test_list_recipes_connect_error_raises_unavailable():
     client = Open3DModelClient("http://o3d:8878", api_key="K", timeout_s=2.0)
     with patch("httpx.Client.get", side_effect=httpx.ConnectError("nope")):