diff --git a/ui/packages/@quent/client/src/api.ts b/ui/packages/@quent/client/src/api.ts
index a5b3b8ba6..9c224225a 100644
--- a/ui/packages/@quent/client/src/api.ts
+++ b/ui/packages/@quent/client/src/api.ts
@@ -18,6 +18,8 @@ import type {
   EntityRef,
   Engine,
   TimelineConfig,
+  EntityListRequest,
+  EntityListResponse,
 } from '@quent/utils';
 
 interface ApiFetchOptions {
@@ -118,6 +120,22 @@ export async function fetchBulkTimelines(
   });
 }
 
+/**
+ * Fetch a ranked, paged list of a query's entities (longest resource-usage
+ * span first). Backs the long-entities Gantt view.
+ */
+export async function fetchEntityList(
+  engineId: string,
+  request: EntityListRequest<QueryFilter, OperatorFilter>
+): Promise<EntityListResponse> {
+  return apiFetch<EntityListResponse>(`/engines/${engineId}/entities`, {
+    fetchOptions: {
+      method: 'POST',
+      body: JSON.stringify(request),
+    },
+  });
+}
+
 /**
  * Fetch the data-flow categorical timeline for a query (all operators in one
  * response). Resolves to `null` when the engine's analyzer does not implement
diff --git a/ui/packages/@quent/client/src/entityList.ts b/ui/packages/@quent/client/src/entityList.ts
new file mode 100644
index 000000000..e029204ab
--- /dev/null
+++ b/ui/packages/@quent/client/src/entityList.ts
@@ -0,0 +1,74 @@
+// SPDX-FileCopyrightText: Copyright (c) 2026, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+// SPDX-License-Identifier: Apache-2.0
+
+import { queryOptions, useQuery } from '@tanstack/react-query';
+import type {
+  EntityListRequest,
+  EntityScope,
+  EntitySortKey,
+  OperatorFilter,
+  QueryFilter,
+  SortDir,
+} from '@quent/utils';
+import { fetchEntityList } from './api';
+import { DEFAULT_STALE_TIME } from './constants';
+
+interface EntityListParams {
+  engineId: string;
+  queryId: string;
+  /** Window bounds in seconds relative to the query epoch. */
+  window: { start: number; end: number };
+  /** Restrict to a single operator; `null` returns entities across all. */
+  operatorId?: string | null;
+  /** Restrict entities to a resource / resource-group scope; `null` for all. */
+  filter?: { scope?: EntityScope | null; entityTypeName?: string | null };
+  /** Keep only entities whose longest usage span exceeds this (seconds). */
+  minUsageSeconds?: number | null;
+  sortKey?: EntitySortKey;
+  sortDir?: SortDir;
+  /** Max entities to return; omit for the full (unpaged) list. */
+  maxItems?: number | null;
+}
+
+function buildRequest({
+  queryId,
+  window,
+  operatorId = null,
+  filter,
+  minUsageSeconds = null,
+  sortKey = 'UsageDuration',
+  sortDir = 'Desc',
+  maxItems = null,
+}: EntityListParams): EntityListRequest<QueryFilter, OperatorFilter> {
+  return {
+    entry: {
+      window,
+      filter: {
+        scope: filter?.scope ?? null,
+        entity_type_name: filter?.entityTypeName ?? null,
+        min_usage_s: minUsageSeconds,
+      },
+      sort: { key: sortKey, dir: sortDir },
+      page: maxItems != null ? { page: 0, max: maxItems } : null,
+      application: { operator_ids: operatorId == null ? [] : [operatorId] },
+    },
+    app_params: { query_id: queryId },
+  };
+}
+
+export const entityListQueryOptions = (
+  params: EntityListParams,
+  options?: { staleTime?: number; enabled?: boolean }
+) => {
+  const request = buildRequest(params);
+  return queryOptions({
+    queryKey: ['entityList', params.engineId, request],
+    queryFn: () => fetchEntityList(params.engineId, request),
+    staleTime: options?.staleTime ?? DEFAULT_STALE_TIME,
+    enabled: options?.enabled ?? true,
+  });
+};
+export const useEntityList = (
+  params: EntityListParams,
+  options?: { staleTime?: number; enabled?: boolean }
+) => useQuery(entityListQueryOptions(params, options));
diff --git a/ui/packages/@quent/client/src/index.ts b/ui/packages/@quent/client/src/index.ts
index aef45f668..ed4cc2b9c 100644
--- a/ui/packages/@quent/client/src/index.ts
+++ b/ui/packages/@quent/client/src/index.ts
@@ -14,6 +14,7 @@ export {
   fetchSingleTimeline,
   fetchBulkTimelines,
   fetchDataFlow,
+  fetchEntityList,
 } from './api';
 
 // queryOptions factories
@@ -24,6 +25,7 @@ export { queriesQueryOptions } from './queries';
 export { singleTimelineQueryOptions } from './timeline';
 export { bulkTimelineQueryOptions } from './bulkTimelines';
 export { dataFlowQueryOptions } from './dataFlow';
+export { entityListQueryOptions } from './entityList';
 
 // Hooks
 export { useQueryBundle } from './queryBundle';
@@ -32,3 +34,4 @@ export { useQueryGroups } from './queryGroups';
 export { useQueries } from './queries';
 export { useTimeline } from './timeline';
 export { useDataFlow } from './dataFlow';
+export { useEntityList } from './entityList';
diff --git a/ui/packages/@quent/utils/src/types/index.ts b/ui/packages/@quent/utils/src/types/index.ts
index e7f0d0d87..a44a9c16a 100644
--- a/ui/packages/@quent/utils/src/types/index.ts
+++ b/ui/packages/@quent/utils/src/types/index.ts
@@ -17,7 +17,13 @@ export type { Edge } from '../../../../../generated/ts-bindings/Edge';
 export type { Engine } from '../../../../../generated/ts-bindings/Engine';
 export type { EngineImplementationAttributes } from '../../../../../generated/ts-bindings/EngineImplementationAttributes';
 export type { EntityFilter } from '../../../../../generated/ts-bindings/EntityFilter';
+export type { EntityListEntry } from '../../../../../generated/ts-bindings/EntityListEntry';
+export type { EntityListFilter } from '../../../../../generated/ts-bindings/EntityListFilter';
+export type { EntityListRequest } from '../../../../../generated/ts-bindings/EntityListRequest';
+export type { EntityListResponse } from '../../../../../generated/ts-bindings/EntityListResponse';
 export type { EntityRef } from '../../../../../generated/ts-bindings/EntityRef';
+export type { EntityScope } from '../../../../../generated/ts-bindings/EntityScope';
+export type { EntitySortKey } from '../../../../../generated/ts-bindings/EntitySortKey';
 export type { FiniteStateMachine } from '../../../../../generated/ts-bindings/FiniteStateMachine';
 export type { FsmStateTypeDecl } from '../../../../../generated/ts-bindings/FsmStateTypeDecl';
 export type { FsmTransition } from '../../../../../generated/ts-bindings/FsmTransition';
@@ -28,6 +34,7 @@ export type { DynamicList } from '../../../../../generated/ts-bindings/DynamicLi
 export type { Operator } from '../../../../../generated/ts-bindings/Operator';
 export type { OperatorFilter } from '../../../../../generated/ts-bindings/OperatorFilter';
 export type { OperatorStatistics } from '../../../../../generated/ts-bindings/OperatorStatistics';
+export type { PageParams } from '../../../../../generated/ts-bindings/PageParams';
 export type { Plan } from '../../../../../generated/ts-bindings/Plan';
 export type { PlanTree } from '../../../../../generated/ts-bindings/PlanTree';
 export type { Port } from '../../../../../generated/ts-bindings/Port';
@@ -52,9 +59,12 @@ export type { ResourceTree } from '../../../../../generated/ts-bindings/Resource
 export type { ResourceTypeDecl } from '../../../../../generated/ts-bindings/ResourceTypeDecl';
 export type { SingleTimelineRequest } from '../../../../../generated/ts-bindings/SingleTimelineRequest';
 export type { SingleTimelineResponse } from '../../../../../generated/ts-bindings/SingleTimelineResponse';
+export type { Sort } from '../../../../../generated/ts-bindings/Sort';
+export type { SortDir } from '../../../../../generated/ts-bindings/SortDir';
 export type { SpanSec } from '../../../../../generated/ts-bindings/SpanSec';
 export type { DynamicStruct } from '../../../../../generated/ts-bindings/DynamicStruct';
 export type { TimelineConfig } from '../../../../../generated/ts-bindings/TimelineConfig';
 export type { TimelineRequest } from '../../../../../generated/ts-bindings/TimelineRequest';
+export type { TimeWindow } from '../../../../../generated/ts-bindings/TimeWindow';
 export type { DynamicValue } from '../../../../../generated/ts-bindings/DynamicValue';
 export type { Worker } from '../../../../../generated/ts-bindings/Worker';