diff --git a/packages/backend/src/misc/json-schema.ts b/packages/backend/src/misc/json-schema.ts
index a721b8663..040e36228 100644
--- a/packages/backend/src/misc/json-schema.ts
+++ b/packages/backend/src/misc/json-schema.ts
@@ -144,7 +144,9 @@ export interface Schema extends OfSchema {
 	readonly type?: TypeStringef;
 	readonly nullable?: boolean;
 	readonly optional?: boolean;
+	readonly prefixItems?: ReadonlyArray<Schema>;
 	readonly items?: Schema;
+	readonly unevaluatedItems?: Schema | boolean;
 	readonly properties?: Obj;
 	readonly required?: ReadonlyArray<Extract<keyof NonNullable<this['properties']>, string>>;
 	readonly description?: string;
@@ -198,6 +200,7 @@ type UnionSchemaType<a extends readonly any[], X extends Schema = a[number]> = X
 //type UnionObjectSchemaType<a extends readonly any[], X extends Schema = a[number]> = X extends any ? ObjectSchemaType<X> : never;
 type UnionObjType<s extends Obj, a extends readonly any[], X extends ReadonlyArray<keyof s> = a[number]> = X extends any ? ObjType<s, X> : never;
 type ArrayUnion<T> = T extends any ? Array<T> : never;
+type ArrayToTuple<X extends ReadonlyArray<Schema>> = { [K in keyof X]: SchemaType<X[K]> };
 
 type ObjectSchemaTypeDef<p extends Schema> =
 	p['ref'] extends keyof typeof refs ? Packed<p['ref']> :
@@ -232,6 +235,12 @@ export type SchemaTypeDef<p extends Schema> =
 			p['items']['allOf'] extends ReadonlyArray<Schema> ? UnionToIntersection<UnionSchemaType<NonNullable<p['items']['allOf']>>>[] :
 			never
 		) :
+		p['prefixItems'] extends ReadonlyArray<Schema> ? (
+			p['items'] extends NonNullable<Schema> ? [...ArrayToTuple<p['prefixItems']>, ...SchemaType<p['items']>[]] :
+			p['items'] extends false ? ArrayToTuple<p['prefixItems']> :
+			p['unevaluatedItems'] extends false ? ArrayToTuple<p['prefixItems']> :
+			[...ArrayToTuple<p['prefixItems']>, ...unknown[]]
+		) :
 		p['items'] extends NonNullable<Schema> ? SchemaType<p['items']>[] :
 		any[]
 	) :
diff --git a/packages/backend/src/server/api/endpoints/admin/queue/deliver-delayed.ts b/packages/backend/src/server/api/endpoints/admin/queue/deliver-delayed.ts
index 7a3410ffa..f3e440b4c 100644
--- a/packages/backend/src/server/api/endpoints/admin/queue/deliver-delayed.ts
+++ b/packages/backend/src/server/api/endpoints/admin/queue/deliver-delayed.ts
@@ -21,16 +21,15 @@ export const meta = {
 		items: {
 			type: 'array',
 			optional: false, nullable: false,
-			items: {
-				anyOf: [
-					{
-						type: 'string',
-					},
-					{
-						type: 'number',
-					},
-				],
-			},
+			prefixItems: [
+				{
+					type: 'string',
+				},
+				{
+					type: 'number',
+				},
+			],
+			unevaluatedItems: false,
 		},
 		example: [[
 			'example.com',
diff --git a/packages/backend/src/server/api/endpoints/admin/queue/inbox-delayed.ts b/packages/backend/src/server/api/endpoints/admin/queue/inbox-delayed.ts
index 305ae1af1..e7589cba8 100644
--- a/packages/backend/src/server/api/endpoints/admin/queue/inbox-delayed.ts
+++ b/packages/backend/src/server/api/endpoints/admin/queue/inbox-delayed.ts
@@ -21,16 +21,15 @@ export const meta = {
 		items: {
 			type: 'array',
 			optional: false, nullable: false,
-			items: {
-				anyOf: [
-					{
-						type: 'string',
-					},
-					{
-						type: 'number',
-					},
-				],
-			},
+			prefixItems: [
+				{
+					type: 'string',
+				},
+				{
+					type: 'number',
+				},
+			],
+			unevaluatedItems: false,
 		},
 		example: [[
 			'example.com',
diff --git a/packages/frontend/src/pages/admin/overview.queue.vue b/packages/frontend/src/pages/admin/overview.queue.vue
index c7478f252..fb190f532 100644
--- a/packages/frontend/src/pages/admin/overview.queue.vue
+++ b/packages/frontend/src/pages/admin/overview.queue.vue
@@ -36,7 +36,9 @@ SPDX-License-Identifier: AGPL-3.0-only
 
 <script lang="ts" setup>
 import { markRaw, onMounted, onUnmounted, ref, shallowRef } from 'vue';
+import * as Misskey from 'misskey-js';
 import XChart from './overview.queue.chart.vue';
+import type { ApQueueDomain } from '@/pages/admin/queue.vue';
 import number from '@/filters/number.js';
 import { useStream } from '@/stream.js';
 
@@ -52,10 +54,10 @@ const chartDelayed = shallowRef<InstanceType<typeof XChart>>();
 const chartWaiting = shallowRef<InstanceType<typeof XChart>>();
 
 const props = defineProps<{
-	domain: string;
+	domain: ApQueueDomain;
 }>();
 
-const onStats = (stats) => {
+function onStats(stats: Misskey.entities.QueueStats) {
 	activeSincePrevTick.value = stats[props.domain].activeSincePrevTick;
 	active.value = stats[props.domain].active;
 	delayed.value = stats[props.domain].delayed;
@@ -65,13 +67,13 @@ const onStats = (stats) => {
 	chartActive.value.pushData(stats[props.domain].active);
 	chartDelayed.value.pushData(stats[props.domain].delayed);
 	chartWaiting.value.pushData(stats[props.domain].waiting);
-};
+}
 
-const onStatsLog = (statsLog) => {
-	const dataProcess = [];
-	const dataActive = [];
-	const dataDelayed = [];
-	const dataWaiting = [];
+function onStatsLog(statsLog: Misskey.entities.QueueStatsLog) {
+	const dataProcess: Misskey.entities.QueueStats[ApQueueDomain]['activeSincePrevTick'][] = [];
+	const dataActive: Misskey.entities.QueueStats[ApQueueDomain]['active'][] = [];
+	const dataDelayed: Misskey.entities.QueueStats[ApQueueDomain]['delayed'][] = [];
+	const dataWaiting: Misskey.entities.QueueStats[ApQueueDomain]['waiting'][] = [];
 
 	for (const stats of [...statsLog].reverse()) {
 		dataProcess.push(stats[props.domain].activeSincePrevTick);
@@ -84,7 +86,7 @@ const onStatsLog = (statsLog) => {
 	chartActive.value.setData(dataActive);
 	chartDelayed.value.setData(dataDelayed);
 	chartWaiting.value.setData(dataWaiting);
-};
+}
 
 onMounted(() => {
 	connection.on('stats', onStats);
diff --git a/packages/frontend/src/pages/admin/queue.chart.vue b/packages/frontend/src/pages/admin/queue.chart.vue
index 8d3fe3532..960a263a8 100644
--- a/packages/frontend/src/pages/admin/queue.chart.vue
+++ b/packages/frontend/src/pages/admin/queue.chart.vue
@@ -49,7 +49,9 @@ SPDX-License-Identifier: AGPL-3.0-only
 
 <script lang="ts" setup>
 import { markRaw, onMounted, onUnmounted, ref, shallowRef } from 'vue';
+import * as Misskey from 'misskey-js';
 import XChart from './queue.chart.chart.vue';
+import type { ApQueueDomain } from '@/pages/admin/queue.vue';
 import number from '@/filters/number.js';
 import { misskeyApi } from '@/scripts/misskey-api.js';
 import { useStream } from '@/stream.js';
@@ -62,17 +64,17 @@ const activeSincePrevTick = ref(0);
 const active = ref(0);
 const delayed = ref(0);
 const waiting = ref(0);
-const jobs = ref<(string | number)[][]>([]);
+const jobs = ref<Misskey.Endpoints[`admin/queue/${ApQueueDomain}-delayed`]['res']>([]);
 const chartProcess = shallowRef<InstanceType<typeof XChart>>();
 const chartActive = shallowRef<InstanceType<typeof XChart>>();
 const chartDelayed = shallowRef<InstanceType<typeof XChart>>();
 const chartWaiting = shallowRef<InstanceType<typeof XChart>>();
 
 const props = defineProps<{
-	domain: string;
+	domain: ApQueueDomain;
 }>();
 
-const onStats = (stats) => {
+function onStats(stats: Misskey.entities.QueueStats) {
 	activeSincePrevTick.value = stats[props.domain].activeSincePrevTick;
 	active.value = stats[props.domain].active;
 	delayed.value = stats[props.domain].delayed;
@@ -82,13 +84,13 @@ const onStats = (stats) => {
 	chartActive.value.pushData(stats[props.domain].active);
 	chartDelayed.value.pushData(stats[props.domain].delayed);
 	chartWaiting.value.pushData(stats[props.domain].waiting);
-};
+}
 
-const onStatsLog = (statsLog) => {
-	const dataProcess = [];
-	const dataActive = [];
-	const dataDelayed = [];
-	const dataWaiting = [];
+function onStatsLog(statsLog: Misskey.entities.QueueStatsLog) {
+	const dataProcess: Misskey.entities.QueueStats[ApQueueDomain]['activeSincePrevTick'][] = [];
+	const dataActive: Misskey.entities.QueueStats[ApQueueDomain]['active'][] = [];
+	const dataDelayed: Misskey.entities.QueueStats[ApQueueDomain]['delayed'][] = [];
+	const dataWaiting: Misskey.entities.QueueStats[ApQueueDomain]['waiting'][] = [];
 
 	for (const stats of [...statsLog].reverse()) {
 		dataProcess.push(stats[props.domain].activeSincePrevTick);
@@ -101,14 +103,12 @@ const onStatsLog = (statsLog) => {
 	chartActive.value.setData(dataActive);
 	chartDelayed.value.setData(dataDelayed);
 	chartWaiting.value.setData(dataWaiting);
-};
+}
 
 onMounted(() => {
-	if (props.domain === 'inbox' || props.domain === 'deliver') {
-		misskeyApi(`admin/queue/${props.domain}-delayed`).then(result => {
-			jobs.value = result;
-		});
-	}
+	misskeyApi(`admin/queue/${props.domain}-delayed`).then(result => {
+		jobs.value = result;
+	});
 
 	connection.on('stats', onStats);
 	connection.on('statsLog', onStatsLog);
diff --git a/packages/frontend/src/pages/admin/queue.vue b/packages/frontend/src/pages/admin/queue.vue
index 8d77d927d..284db894b 100644
--- a/packages/frontend/src/pages/admin/queue.vue
+++ b/packages/frontend/src/pages/admin/queue.vue
@@ -16,7 +16,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 </template>
 
 <script lang="ts" setup>
-import { ref, computed } from 'vue';
+import { ref, computed, type Ref } from 'vue';
 import XQueue from './queue.chart.vue';
 import XHeader from './_header_.vue';
 import * as os from '@/os.js';
@@ -25,7 +25,9 @@ import { i18n } from '@/i18n.js';
 import { definePageMetadata } from '@/scripts/page-metadata.js';
 import MkButton from '@/components/MkButton.vue';
 
-const tab = ref('deliver');
+export type ApQueueDomain = 'deliver' | 'inbox';
+
+const tab: Ref<ApQueueDomain> = ref('deliver');
 
 function clear() {
 	os.confirm({
diff --git a/packages/misskey-js/src/autogen/types.ts b/packages/misskey-js/src/autogen/types.ts
index 37f1bf2d3..b99a5373b 100644
--- a/packages/misskey-js/src/autogen/types.ts
+++ b/packages/misskey-js/src/autogen/types.ts
@@ -8218,7 +8218,7 @@ export type operations = {
       /** @description OK (with results) */
       200: {
         content: {
-          'application/json': ((string | number)[])[];
+          'application/json': [string, number][];
         };
       };
       /** @description Client error */
@@ -8264,7 +8264,7 @@ export type operations = {
       /** @description OK (with results) */
       200: {
         content: {
-          'application/json': ((string | number)[])[];
+          'application/json': [string, number][];
         };
       };
       /** @description Client error */