diff --git a/src/gpuhunt/providers/nebius.py b/src/gpuhunt/providers/nebius.py
index 38be2ef..288ce04 100644
--- a/src/gpuhunt/providers/nebius.py
+++ b/src/gpuhunt/providers/nebius.py
@@ -1,6 +1,7 @@
 import logging
 import re
-from typing import Optional
+from dataclasses import dataclass
+from typing import Optional, cast
 
 from nebius.aio.channel import Credentials
 from nebius.api.nebius.billing.v1alpha1 import (
@@ -26,11 +27,13 @@
     TenantServiceClient,
 )
 from nebius.sdk import SDK
+from typing_extensions import TypedDict
 
 from gpuhunt._internal.constraints import find_accelerators
 from gpuhunt._internal.models import (
     AcceleratorInfo,
     AcceleratorVendor,
+    JSONObject,
     QueryFilter,
     RawCatalogItem,
 )
@@ -40,6 +43,26 @@
 TIMEOUT = 7
 
 
+@dataclass(frozen=True)
+class InfinibandFabric:
+    name: str
+    platform: str
+    region: str
+
+
+# https://docs.nebius.com/compute/clusters/gpu#fabrics
+INFINIBAND_FABRICS = [
+    InfinibandFabric("fabric-2", "gpu-h100-sxm", "eu-north1"),
+    InfinibandFabric("fabric-3", "gpu-h100-sxm", "eu-north1"),
+    InfinibandFabric("fabric-4", "gpu-h100-sxm", "eu-north1"),
+    InfinibandFabric("fabric-5", "gpu-h200-sxm", "eu-west1"),
+    InfinibandFabric("fabric-6", "gpu-h100-sxm", "eu-north1"),
+    InfinibandFabric("fabric-7", "gpu-h200-sxm", "eu-north1"),
+    InfinibandFabric("us-central1-a", "gpu-h200-sxm", "us-central1"),
+    InfinibandFabric("us-central1-b", "gpu-b200-sxm", "us-central1"),
+]
+
+
 class NebiusProvider(AbstractProvider):
     NAME = "nebius"
 
@@ -77,6 +100,10 @@ def get(
         return items
 
 
+class NebiusCatalogItemProviderData(TypedDict):
+    fabrics: list[str]
+
+
 def get_sample_projects(sdk: SDK) -> dict[str, str]:
     """
     Returns:
@@ -141,6 +168,12 @@ def make_item(
     spot: bool,
     price: float,
 ) -> Optional[RawCatalogItem]:
+    fabrics = []
+    if preset.allow_gpu_clustering:
+        fabrics = [
+            f.name for f in INFINIBAND_FABRICS if f.platform == platform and f.region == region
+        ]
+
     item = RawCatalogItem(
         instance_name=f"{platform} {preset.name}",
         location=region,
@@ -153,6 +186,7 @@ def make_item(
         gpu_vendor=None,
         spot=spot,
         disk_size=None,
+        provider_data=cast(JSONObject, NebiusCatalogItemProviderData(fabrics=fabrics)),
     )
 
     if preset.resources.gpu_count:
diff --git a/src/integrity_tests/test_nebius.py b/src/integrity_tests/test_nebius.py
index 308fd14..86f504c 100644
--- a/src/integrity_tests/test_nebius.py
+++ b/src/integrity_tests/test_nebius.py
@@ -1,4 +1,5 @@
 import csv
+import json
 from operator import itemgetter
 from pathlib import Path
 
@@ -28,3 +29,41 @@ def test_spots_presented(data_rows: list[dict]):
 @pytest.mark.parametrize("location", ["eu-north1", "eu-west1"])
 def test_location_present(location: str, data_rows: list[dict]):
     assert location in map(itemgetter("location"), data_rows)
+
+
+def test_fabrics_unique(data_rows: list[dict]) -> None:
+    for row in data_rows:
+        fabrics = json.loads(row["provider_data"])["fabrics"]
+        assert len(fabrics) == len(set(fabrics)), f"Duplicate fabrics in row: {row}"
+
+
+def test_fabrics_on_sample_offer(data_rows: list[dict]) -> None:
+    for row in data_rows:
+        if (
+            row["instance_name"] == "gpu-h100-sxm 8gpu-128vcpu-1600gb"
+            and row["location"] == "eu-north1"
+        ):
+            break
+    else:
+        raise ValueError("Offer not found")
+    fabrics = set(json.loads(row["provider_data"])["fabrics"])
+    expected_fabrics = {
+        "fabric-2",
+        "fabric-3",
+        "fabric-4",
+        "fabric-6",
+    }
+    missing_fabrics = expected_fabrics - fabrics
+    assert not missing_fabrics
+
+
+def test_no_fabrics_on_sample_non_clustered_offer(data_rows: list[dict]) -> None:
+    for row in data_rows:
+        if (
+            row["instance_name"] == "gpu-h100-sxm 1gpu-16vcpu-200gb"
+            and row["location"] == "eu-north1"
+        ):
+            break
+    else:
+        raise ValueError("Offer not found")
+    assert json.loads(row["provider_data"])["fabrics"] == []