diff --git a/src/agentkit/cli/admin.py b/src/agentkit/cli/admin.py
index 427cb96..50ad19e 100644
--- a/src/agentkit/cli/admin.py
+++ b/src/agentkit/cli/admin.py
@@ -1403,7 +1403,6 @@ def usage_top_users(
     table = Table(title=f"Top {limit} Users by Tokens")
     table.add_column("Rank", style="cyan")
     table.add_column("User ID")
-    table.add_column("Username")
     table.add_column("Requests")
     table.add_column("Tokens")
     table.add_column("Cost")
@@ -1411,7 +1410,6 @@ def usage_top_users(
         table.add_row(
             str(i),
             str(row.get("user_id", "")),
-            str(row.get("username", "")),
             str(row.get("requests", "")),
             str(row.get("tokens", "")),
             str(row.get("cost", "")),
diff --git a/src/agentkit/server/frontend/src/api/admin.ts b/src/agentkit/server/frontend/src/api/admin.ts
index a68979a..489d491 100644
--- a/src/agentkit/server/frontend/src/api/admin.ts
+++ b/src/agentkit/server/frontend/src/api/admin.ts
@@ -86,9 +86,9 @@ export interface IUsageSummary {
   total_tokens: number
   total_cost: number
   total_requests: number
-  by_model: Record<string, { tokens: number; cost: number; requests: number }>
-  by_user: Record<string, { tokens: number; cost: number; requests: number }>
-  by_department: Record<string, { tokens: number; cost: number; requests: number }>
+  by_model: Record<string, { total_tokens: number; total_cost: number; count: number }>
+  by_user: Record<string, { total_tokens: number; total_cost: number; count: number }>
+  by_department: Record<string, { total_tokens: number; total_cost: number; count: number }>
 }
 
 /** Usage timeseries bucket. */
diff --git a/src/agentkit/server/frontend/src/views/admin/UsageDashboardView.vue b/src/agentkit/server/frontend/src/views/admin/UsageDashboardView.vue
index e0f725c..5fa2ea2 100644
--- a/src/agentkit/server/frontend/src/views/admin/UsageDashboardView.vue
+++ b/src/agentkit/server/frontend/src/views/admin/UsageDashboardView.vue
@@ -198,9 +198,9 @@ interface ISelectOption {
 
 /** Per-bucket usage metric (matches ``IUsageSummary.by_*`` value shape). */
 interface IUsageMetric {
-  tokens: number
-  cost: number
-  requests: number
+  total_tokens: number
+  total_cost: number
+  count: number
 }
 
 /** Flattened per-department usage row (derived from ``IUsageSummary.by_department``). */
@@ -247,9 +247,9 @@ const deptRows = computed<IDeptUsageRow[]>(() => {
   const map: Record<string, IUsageMetric> = summary.value?.by_department ?? {}
   return Object.entries(map).map(([departmentId, v]) => ({
     department_id: departmentId,
-    tokens: v.tokens,
-    cost: v.cost,
-    requests: v.requests,
+    tokens: v.total_tokens,
+    cost: v.total_cost,
+    requests: v.count,
   }))
 })
 
diff --git a/tests/unit/cli/test_admin_commands.py b/tests/unit/cli/test_admin_commands.py
index 7e17157..aac5b37 100644
--- a/tests/unit/cli/test_admin_commands.py
+++ b/tests/unit/cli/test_admin_commands.py
@@ -722,7 +722,6 @@ class TestUsageCommands:
         mock_client.get.return_value = [
             {
                 "user_id": "user-1",
-                "username": "alice",
                 "requests": 100,
                 "tokens": 50000,
                 "cost": 1.5,
@@ -730,7 +729,7 @@ class TestUsageCommands:
         ]
         result = runner.invoke(admin_app, ["usage", "top-users", "--limit", "5"])
         assert result.exit_code == 0
-        assert "alice" in result.stdout
+        assert "user-1" in result.stdout
         params = mock_client.get.call_args.kwargs["params"]
         assert params["limit"] == 5