diff --git a/packages/backend/src/server/api/endpoints/meta.ts b/packages/backend/src/server/api/endpoints/meta.ts
index 0d11c5a92..cbf74ef04 100644
--- a/packages/backend/src/server/api/endpoints/meta.ts
+++ b/packages/backend/src/server/api/endpoints/meta.ts
@@ -10,6 +10,9 @@ export const meta = {
 
 	requireCredential: false,
 
+	allowGet: true,
+	cacheSec: 60,
+
 	res: {
 		type: 'object',
 		optional: false, nullable: false,
@@ -253,7 +256,12 @@ export const meta = {
 export const paramDef = {
 	type: 'object',
 	properties: {
-		detail: { type: 'boolean', default: true },
+		detail: {
+			deprecated: true,
+			description: 'This parameter is ignored. You will always get all details (as if it was `true`).',
+			type: 'boolean',
+			default: true,
+		},
 	},
 	required: [],
 } as const;
@@ -276,7 +284,7 @@ export default define(meta, paramDef, async (ps, me) => {
 		},
 	});
 
-	const response: any = {
+	return {
 		maintainerName: instance.maintainerName,
 		maintainerEmail: instance.maintainerEmail,
 
@@ -317,21 +325,16 @@ export default define(meta, paramDef, async (ps, me) => {
 
 		translatorAvailable: instance.deeplAuthKey != null,
 
-		...(ps.detail ? {
-			pinnedPages: instance.pinnedPages,
-			pinnedClipId: instance.pinnedClipId,
-			cacheRemoteFiles: instance.cacheRemoteFiles,
-			requireSetup: (await Users.countBy({
-				host: IsNull(),
-			})) === 0,
-		} : {}),
-	};
+		pinnedPages: instance.pinnedPages,
+		pinnedClipId: instance.pinnedClipId,
+		cacheRemoteFiles: instance.cacheRemoteFiles,
+		requireSetup: (await Users.countBy({
+			host: IsNull(),
+		})) === 0,
 
-	if (ps.detail) {
-		const proxyAccount = instance.proxyAccountId ? await Users.pack(instance.proxyAccountId).catch(() => null) : null;
+		proxyAccountName: instance.proxyAccountId ? (await Users.pack(instance.proxyAccountId).catch(() => null))?.username : null,
 
-		response.proxyAccountName = proxyAccount ? proxyAccount.username : null;
-		response.features = {
+		features: {
 			registration: !instance.disableRegistration,
 			localTimeLine: !instance.disableLocalTimeline,
 			globalTimeLine: !instance.disableGlobalTimeline,
@@ -345,8 +348,6 @@ export default define(meta, paramDef, async (ps, me) => {
 			discord: instance.enableDiscordIntegration,
 			serviceWorker: instance.enableServiceWorker,
 			miauth: true,
-		};
-	}
-
-	return response;
+		},
+	};
 });
diff --git a/packages/client/src/components/featured-photos.vue b/packages/client/src/components/featured-photos.vue
index ac96c1a4d..d75da9684 100644
--- a/packages/client/src/components/featured-photos.vue
+++ b/packages/client/src/components/featured-photos.vue
@@ -1,17 +1,9 @@
 <template>
-<div v-if="meta" class="xfbouadm" :style="{ backgroundImage: `url(${ meta.backgroundImageUrl })` }"></div>
+<div class="xfbouadm" :style="{ backgroundImage: `url(${ instance.backgroundImageUrl })` }"></div>
 </template>
 
 <script lang="ts" setup>
-import { ref } from 'vue';
-import * as foundkey from 'foundkey-js';
-import * as os from '@/os';
-
-const meta = ref<foundkey.entities.DetailedInstanceMetadata>();
-
-os.api('meta', { detail: true }).then(gotMeta => {
-	meta.value = gotMeta;
-});
+import { instance } from '@/instance';
 </script>
 
 <style lang="scss" scoped>
diff --git a/packages/client/src/instance.ts b/packages/client/src/instance.ts
index b4bc07578..71a293005 100644
--- a/packages/client/src/instance.ts
+++ b/packages/client/src/instance.ts
@@ -1,6 +1,6 @@
 import { computed, reactive } from 'vue';
 import * as foundkey from 'foundkey-js';
-import { api } from '@/os';
+import { apiGet } from '@/os';
 
 // TODO: 他のタブと永続化されたstateを同期
 
@@ -13,13 +13,7 @@ export const instance: foundkey.entities.InstanceMetadata = reactive(instanceDat
 });
 
 export async function fetchInstance(): Promise<void> {
-	const meta = await api('meta', {
-		detail: false,
-	});
-
-	for (const [k, v] of Object.entries(meta)) {
-		instance[k] = v;
-	}
+	Object.assign(instance, await apiGet('meta'));
 
 	localStorage.setItem('instance', JSON.stringify(instance));
 }
diff --git a/packages/client/src/pages/_error_.vue b/packages/client/src/pages/_error_.vue
index 58e26785b..6269c67fa 100644
--- a/packages/client/src/pages/_error_.vue
+++ b/packages/client/src/pages/_error_.vue
@@ -4,7 +4,7 @@
 	<div v-show="loaded" class="mjndxjch">
 		<img src="https://xn--931a.moe/assets/error.jpg" class="_ghost"/>
 		<p><b><i class="fas fa-exclamation-triangle"></i> {{ i18n.ts.pageLoadError }}</b></p>
-		<p v-if="meta && (version === meta.version)">{{ i18n.ts.pageLoadErrorDescription }}</p>
+		<p v-if="version === instance.version">{{ i18n.ts.pageLoadErrorDescription }}</p>
 		<p v-else-if="serverIsDead">{{ i18n.ts.serverIsDead }}</p>
 		<template v-else>
 			<p>{{ i18n.ts.newVersionOfClientAvailable }}</p>
@@ -21,6 +21,7 @@
 import * as foundkey from 'foundkey-js';
 import MkButton from '@/components/ui/button.vue';
 import { version } from '@/config';
+import { instance } from '@/instance';
 import * as os from '@/os';
 import { unisonReload } from '@/scripts/unison-reload';
 import { i18n } from '@/i18n';
@@ -34,15 +35,11 @@ withDefaults(defineProps<{
 
 let loaded = $ref(false);
 let serverIsDead = $ref(false);
-let meta = $ref<foundkey.entities.LiteInstanceMetadata | null>(null);
 
-os.api('meta', {
-	detail: false,
-}).then(res => {
+// just checking whether the server is alive or dead
+os.api('ping').then(() => {
 	loaded = true;
 	serverIsDead = false;
-	meta = res;
-	localStorage.setItem('v', res.version);
 }, () => {
 	loaded = true;
 	serverIsDead = true;
diff --git a/packages/client/src/pages/welcome.entrance.a.vue b/packages/client/src/pages/welcome.entrance.a.vue
index 946833819..12dd78025 100644
--- a/packages/client/src/pages/welcome.entrance.a.vue
+++ b/packages/client/src/pages/welcome.entrance.a.vue
@@ -1,5 +1,5 @@
 <template>
-<div v-if="meta" class="rsqzvsbo">
+<div class="rsqzvsbo">
 	<div class="top">
 		<MkFeaturedPhotos class="bg"/>
 		<XTimeline class="tl"/>
@@ -19,12 +19,12 @@
 			<div class="fg">
 				<h1>
 					<!-- 背景色によってはロゴが見えなくなるのでとりあえず無効に -->
-					<!-- <img class="logo" v-if="meta.logoImageUrl" :src="meta.logoImageUrl"><span v-else class="text">{{ instanceName }}</span> -->
+					<!-- <img class="logo" v-if="instance.logoImageUrl" :src="instance.logoImageUrl"><span v-else class="text">{{ instanceName }}</span> -->
 					<span class="text">{{ instanceName }}</span>
 				</h1>
 				<div class="about">
 					<!-- eslint-disable-next-line vue/no-v-html -->
-					<div class="desc" v-html="meta.description || i18n.ts.headlineMisskey"></div>
+					<div class="desc" v-html="instance.description || i18n.ts.headlineMisskey"></div>
 				</div>
 				<div class="action">
 					<MkButton inline rounded gradate data-cy-signup style="margin-right: 12px;" @click="signup()">{{ i18n.ts.signup }}</MkButton>
@@ -58,17 +58,13 @@ import { host, instanceName } from '@/config';
 import * as os from '@/os';
 import number from '@/filters/number';
 import { i18n } from '@/i18n';
+import { instance } from '@/instance';
 
-let meta = $ref();
 let stats = $ref();
 let tags = $ref();
 let onlineUsersCount = $ref();
 let instances = $ref();
 
-os.api('meta', { detail: true }).then(_meta => {
-	meta = _meta;
-});
-
 os.api('stats').then(_stats => {
 	stats = _stats;
 });
diff --git a/packages/client/src/pages/welcome.vue b/packages/client/src/pages/welcome.vue
index 2a714caf8..512ec3fa7 100644
--- a/packages/client/src/pages/welcome.vue
+++ b/packages/client/src/pages/welcome.vue
@@ -1,8 +1,6 @@
 <template>
-<div v-if="meta">
-	<XSetup v-if="meta.requireSetup"/>
+	<XSetup v-if="instance.requireSetup"/>
 	<XEntrance v-else/>
-</div>
 </template>
 
 <script lang="ts" setup>
@@ -10,15 +8,10 @@ import { computed } from 'vue';
 import XSetup from './welcome.setup.vue';
 import XEntrance from './welcome.entrance.a.vue';
 import { instanceName } from '@/config';
+import { instance } from '@/instance';
 import * as os from '@/os';
 import { definePageMetadata } from '@/scripts/page-metadata';
 
-let meta = $ref(null);
-
-os.api('meta', { detail: true }).then(res => {
-	meta = res;
-});
-
 definePageMetadata(computed(() => ({
 	title: instanceName,
 	icon: null,
diff --git a/packages/client/src/ui/visitor/b.vue b/packages/client/src/ui/visitor/b.vue
index 3482d8fae..7f8446bc2 100644
--- a/packages/client/src/ui/visitor/b.vue
+++ b/packages/client/src/ui/visitor/b.vue
@@ -80,7 +80,6 @@ const announcements = {
 let showMenu = $ref(false);
 let isDesktop = $ref(window.innerWidth >= DESKTOP_THRESHOLD);
 let narrow = $ref(window.innerWidth < 1280);
-let meta = $ref();
 
 const keymap = $computed(() => {
 	return {
@@ -94,10 +93,6 @@ const keymap = $computed(() => {
 
 const root = $computed(() => mainRouter.currentRoute.value.name === 'index');
 
-os.api('meta', { detail: true }).then(res => {
-	meta = res;
-});
-
 function signin() {
 	os.popup(XSigninDialog, {
 		autoSet: true,