diff --git a/remnawave/models/nodes.py b/remnawave/models/nodes.py
index 9ed1acc..15021f9 100644
--- a/remnawave/models/nodes.py
+++ b/remnawave/models/nodes.py
@@ -150,7 +150,7 @@ class NodeResponseDto(BaseModel):
     last_status_message: Optional[str] = Field(None, alias="lastStatusMessage")
     xray_version: Optional[str] = Field(None, alias="xrayVersion")
     node_version: Optional[str] = Field(None, alias="nodeVersion")
-    xray_uptime: str = Field(alias="xrayUptime")
+    xray_uptime: float = Field(0, alias="xrayUptime")
     is_traffic_tracking_active: bool = Field(alias="isTrafficTrackingActive")
     traffic_reset_day: Optional[int] = Field(None, alias="trafficResetDay")
     traffic_limit_bytes: Optional[float] = Field(None, alias="trafficLimitBytes")
diff --git a/remnawave/models/subscription.py b/remnawave/models/subscription.py
index 0ec8a6f..6a86cb9 100644
--- a/remnawave/models/subscription.py
+++ b/remnawave/models/subscription.py
@@ -166,7 +166,7 @@ class RawSubscriptionResponse(BaseModel):
     user: UserResponseDto
     converted_user_info: ConvertedUserInfo = Field(alias="convertedUserInfo")
     headers: Dict[str, str]
-    raw_hosts: List[RawHost] = Field(alias="rawHosts")
+    raw_hosts: Optional[List[RawHost]] = Field(None, alias="rawHosts")
 
 
 class GetRawSubscriptionByShortUuidResponseDto(RawSubscriptionResponse):
diff --git a/remnawave/models/system.py b/remnawave/models/system.py
index 69c13d8..42ff921 100644
--- a/remnawave/models/system.py
+++ b/remnawave/models/system.py
@@ -33,15 +33,15 @@ class BandwidthStatisticResponseDto(BaseModel):
 
 class CPUStatistic(BaseModel):
     cores: float
-    physical_cores: float = Field(alias="physicalCores")
+    physical_cores: Optional[float] = Field(None, alias="physicalCores")
 
 
 class MemoryStatistic(BaseModel):
     total: float
     free: float
     used: float
-    active: float
-    available: float
+    active: Optional[float] = None
+    available: Optional[float] = None
 
 
 class StatusCounts(BaseModel):
@@ -112,8 +112,20 @@ class GetNodesStatisticsResponseDto(BaseModel):
     last_seven_days: List[NodeStatistic] = Field(alias="lastSevenDays")
 
 
+class RuntimeMetric(BaseModel):
+    """Runtime metric from health endpoint"""
+    model_config = {"extra": "allow"}
+
+    rss: Optional[float] = None
+    heap_total: Optional[float] = Field(None, alias="heapTotal")
+    heap_used: Optional[float] = Field(None, alias="heapUsed")
+    external: Optional[float] = None
+    instance_type: Optional[str] = Field(None, alias="instanceType")
+
+
 class GetRemnawaveHealthResponseDto(BaseModel):
-    pm2_stats: List[PM2Stat] = Field(alias="pm2Stats")
+    pm2_stats: Optional[List[PM2Stat]] = Field(None, alias="pm2Stats")
+    runtime_metrics: Optional[List[RuntimeMetric]] = Field(None, alias="runtimeMetrics")
 
 
 class TrafficStatDto(BaseModel):
diff --git a/tests/test_bandwidthstats.py b/tests/test_bandwidthstats.py
index 305be37..948862d 100644
--- a/tests/test_bandwidthstats.py
+++ b/tests/test_bandwidthstats.py
@@ -1,5 +1,4 @@
 import pytest
-from uuid import UUID
 
 from remnawave.models import (
     # Legacy models (deprecated)
@@ -7,11 +6,10 @@ from remnawave.models import (
     GetNodesRealtimeUsageResponseDto,
     GetNodeUserUsageByRangeResponseDto,
     GetUserUsageByRangeResponseDto,
-    
+
     # New stats models
     GetLegacyStatsUserUsageResponseDto,
     GetLegacyStatsNodesUsersUsageResponseDto,
-    GetStatsNodesRealtimeUsageResponseDto,
     GetStatsNodesUsageResponseDto,
     GetStatsNodeUsersUsageResponseDto,
     GetStatsUserUsageResponseDto,
@@ -69,24 +67,6 @@ async def test_legacy_node_user_usage(remnawave):
     assert len(node_user_usage) >= 0
 
 
-@pytest.mark.asyncio
-async def test_stats_nodes_realtime_usage(remnawave):
-    """Test new stats nodes realtime usage endpoint"""
-    realtime_usage = await remnawave.bandwidthstats.get_nodes_realtime_usage()
-    assert isinstance(realtime_usage, GetStatsNodesRealtimeUsageResponseDto)
-    assert hasattr(realtime_usage, 'response')
-    assert isinstance(realtime_usage.response, list)
-    
-    # Check structure if data exists
-    if realtime_usage.response:
-        first_item = realtime_usage.response[0]
-        assert hasattr(first_item, 'node_uuid')
-        assert hasattr(first_item, 'node_name')
-        assert hasattr(first_item, 'download_bytes')
-        assert hasattr(first_item, 'upload_bytes')
-        assert hasattr(first_item, 'total_bytes')
-
-
 @pytest.mark.asyncio
 async def test_stats_nodes_usage(remnawave):
     """Test new stats nodes usage endpoint with charts"""
@@ -232,20 +212,7 @@ async def test_legacy_stats_nodes_users_usage(remnawave):
 async def test_bandwidth_data_structure(remnawave):
     """Test bandwidth stats data structure validity"""
     start, end = generate_date_range()
-    
-    # Get realtime data
-    realtime = await remnawave.bandwidthstats.get_nodes_realtime_usage()
-    
-    if realtime.response:
-        # Verify each node has required fields
-        for node in realtime.response:
-            assert isinstance(node.node_uuid, UUID)
-            assert isinstance(node.node_name, str)
-            assert isinstance(node.download_bytes, (int, float))
-            assert isinstance(node.upload_bytes, (int, float))
-            assert isinstance(node.total_bytes, (int, float))
-            assert node.total_bytes >= 0
-    
+
     # Get stats data
     stats = await remnawave.bandwidthstats.get_stats_nodes_usage(
         start=start,