diff --git a/api/services/billing_service.py b/api/services/billing_service.py
index 9720a8e7c3..75dd3519ad 100644
--- a/api/services/billing_service.py
+++ b/api/services/billing_service.py
@@ -55,6 +55,27 @@ _quota_commit_adapter = TypeAdapter(QuotaCommitResult)
 _quota_release_adapter = TypeAdapter(QuotaReleaseResult)
 
 
+class _TenantFeatureQuota(TypedDict):
+    usage: int
+    limit: int
+    reset_date: NotRequired[int]
+
+
+class TenantFeatureQuotaInfo(TypedDict):
+    """Response of /quota/info.
+
+    NOTE (hj24):
+    - Same convention as BillingInfo: billing may return int fields as str,
+      always keep non-strict mode to auto-coerce.
+    """
+
+    trigger_event: _TenantFeatureQuota
+    api_rate_limit: _TenantFeatureQuota
+
+
+_tenant_feature_quota_info_adapter = TypeAdapter(TenantFeatureQuotaInfo)
+
+
 class _BillingQuota(TypedDict):
     size: int
     limit: int
@@ -178,9 +199,11 @@ class BillingService:
         return usage_info
 
     @classmethod
-    def get_quota_info(cls, tenant_id: str):
+    def get_quota_info(cls, tenant_id: str) -> TenantFeatureQuotaInfo:
         params = {"tenant_id": tenant_id}
-        return cls._send_request("GET", "/quota/info", params=params)
+        return _tenant_feature_quota_info_adapter.validate_python(
+            cls._send_request("GET", "/quota/info", params=params)
+        )
 
     @classmethod
     def quota_reserve(
diff --git a/api/tests/unit_tests/services/test_billing_service.py b/api/tests/unit_tests/services/test_billing_service.py
index 09806f608e..34f718ba02 100644
--- a/api/tests/unit_tests/services/test_billing_service.py
+++ b/api/tests/unit_tests/services/test_billing_service.py
@@ -640,6 +640,38 @@ class TestBillingServiceQuotaOperations:
         assert result["released"] == 1
         assert isinstance(result["released"], int)
 
+    def test_get_quota_info_coerces_string_to_int(self, mock_send_request):
+        """Test that TypeAdapter coerces string values to int for get_quota_info."""
+        mock_send_request.return_value = {
+            "trigger_event": {"usage": "42", "limit": "3000", "reset_date": "1700000000"},
+            "api_rate_limit": {"usage": "10", "limit": "-1", "reset_date": "-1"},
+        }
+
+        result = BillingService.get_quota_info("t1")
+
+        assert result["trigger_event"]["usage"] == 42
+        assert isinstance(result["trigger_event"]["usage"], int)
+        assert result["trigger_event"]["limit"] == 3000
+        assert isinstance(result["trigger_event"]["limit"], int)
+        assert result["trigger_event"]["reset_date"] == 1700000000
+        assert isinstance(result["trigger_event"]["reset_date"], int)
+        assert result["api_rate_limit"]["limit"] == -1
+        assert isinstance(result["api_rate_limit"]["limit"], int)
+
+    def test_get_quota_info_accepts_int_values(self, mock_send_request):
+        """Test that get_quota_info works with native int values."""
+        expected = {
+            "trigger_event": {"usage": 42, "limit": 3000, "reset_date": 1700000000},
+            "api_rate_limit": {"usage": 0, "limit": -1},
+        }
+        mock_send_request.return_value = expected
+
+        result = BillingService.get_quota_info("t1")
+
+        assert result["trigger_event"]["usage"] == 42
+        assert result["trigger_event"]["limit"] == 3000
+        assert result["api_rate_limit"]["limit"] == -1
+
 
 class TestBillingServiceRateLimitEnforcement:
     """Unit tests for rate limit enforcement mechanisms.