diff --git a/CHANGELOG.md b/CHANGELOG.md
index edfe09391..f16df03ee 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,7 @@ You should also include the user name that made the change.
 ## 12.x.x (unreleased)
 
 ### Improvements
+- Server: Allow GET method for some endpoints @syuilo
 - Server: Add rate limit to i/notifications @tamaina
 - Client: Improve control panel @syuilo
 - Client: Show warning in control panel when there is an unresolved abuse report @syuilo
diff --git a/packages/backend/src/server/api/api-handler.ts b/packages/backend/src/server/api/api-handler.ts
index f97c3dd39..d2d16597e 100644
--- a/packages/backend/src/server/api/api-handler.ts
+++ b/packages/backend/src/server/api/api-handler.ts
@@ -6,7 +6,11 @@ import call from './call.js';
 import { ApiError } from './error.js';
 
 export default (endpoint: IEndpoint, ctx: Koa.Context) => new Promise<void>((res) => {
-	const body = ctx.request.body;
+	const body = ctx.is('multipart/form-data')
+		? (ctx.req as any).body
+		: ctx.method === 'GET'
+			? ctx.query
+			: ctx.request.body;
 
 	const reply = (x?: any, y?: ApiError) => {
 		if (x == null) {
@@ -33,6 +37,9 @@ export default (endpoint: IEndpoint, ctx: Koa.Context) => new Promise<void>((res
 	authenticate(body['i']).then(([user, app]) => {
 		// API invoking
 		call(endpoint.name, user, app, body, ctx).then((res: any) => {
+			if (ctx.method === 'GET' && endpoint.meta.cacheSec && !body['i'] && !user) {
+				ctx.set('Cache-Control', `public, max-age=${endpoint.meta.cacheSec}`);
+			}
 			reply(res);
 		}).catch((e: ApiError) => {
 			reply(e.httpStatusCode ? e.httpStatusCode : e.kind === 'client' ? 400 : 500, e);
diff --git a/packages/backend/src/server/api/call.ts b/packages/backend/src/server/api/call.ts
index edd561ed8..fe1698dbc 100644
--- a/packages/backend/src/server/api/call.ts
+++ b/packages/backend/src/server/api/call.ts
@@ -94,7 +94,7 @@ export default async (endpoint: string, user: CacheableLocalUser | null | undefi
 	}
 
 	// Cast non JSON input
-	if (ep.meta.requireFile && ep.params.properties) {
+	if ((ep.meta.requireFile || ctx?.method === 'GET') && ep.params.properties) {
 		for (const k of Object.keys(ep.params.properties)) {
 			const param = ep.params.properties![k];
 			if (['boolean', 'number', 'integer'].includes(param.type ?? '') && typeof data[k] === 'string') {
diff --git a/packages/backend/src/server/api/endpoints.ts b/packages/backend/src/server/api/endpoints.ts
index 5fac7df23..11d9d7c02 100644
--- a/packages/backend/src/server/api/endpoints.ts
+++ b/packages/backend/src/server/api/endpoints.ts
@@ -701,6 +701,16 @@ export interface IEndpointMeta {
 	readonly kind?: string;
 
 	readonly description?: string;
+
+	/**
+	 * GETでのリクエストを許容するか否か
+	 */
+	readonly allowGet?: boolean;
+
+	/**
+	 * 正常応答をキャッシュ (Cache-Control: public) する秒数
+	 */
+	readonly cacheSec?: number;
 }
 
 export interface IEndpoint {
diff --git a/packages/backend/src/server/api/endpoints/charts/active-users.ts b/packages/backend/src/server/api/endpoints/charts/active-users.ts
index 97f7885db..ea2379429 100644
--- a/packages/backend/src/server/api/endpoints/charts/active-users.ts
+++ b/packages/backend/src/server/api/endpoints/charts/active-users.ts
@@ -1,11 +1,14 @@
-import define from '../../define.js';
 import { getJsonSchema } from '@/services/chart/core.js';
 import { activeUsersChart } from '@/services/chart/index.js';
+import define from '../../define.js';
 
 export const meta = {
 	tags: ['charts', 'users'],
 
 	res: getJsonSchema(activeUsersChart.schema),
+
+	allowGet: true,
+	cacheSec: 60 * 60,
 } as const;
 
 export const paramDef = {
diff --git a/packages/backend/src/server/api/endpoints/charts/ap-request.ts b/packages/backend/src/server/api/endpoints/charts/ap-request.ts
index 4477bfc98..06dee250e 100644
--- a/packages/backend/src/server/api/endpoints/charts/ap-request.ts
+++ b/packages/backend/src/server/api/endpoints/charts/ap-request.ts
@@ -1,11 +1,14 @@
-import define from '../../define.js';
 import { getJsonSchema } from '@/services/chart/core.js';
 import { apRequestChart } from '@/services/chart/index.js';
+import define from '../../define.js';
 
 export const meta = {
 	tags: ['charts'],
 
 	res: getJsonSchema(apRequestChart.schema),
+
+	allowGet: true,
+	cacheSec: 60 * 60,
 } as const;
 
 export const paramDef = {
diff --git a/packages/backend/src/server/api/endpoints/charts/drive.ts b/packages/backend/src/server/api/endpoints/charts/drive.ts
index fd6033392..dd2c2d683 100644
--- a/packages/backend/src/server/api/endpoints/charts/drive.ts
+++ b/packages/backend/src/server/api/endpoints/charts/drive.ts
@@ -1,11 +1,14 @@
-import define from '../../define.js';
 import { getJsonSchema } from '@/services/chart/core.js';
 import { driveChart } from '@/services/chart/index.js';
+import define from '../../define.js';
 
 export const meta = {
 	tags: ['charts', 'drive'],
 
 	res: getJsonSchema(driveChart.schema),
+
+	allowGet: true,
+	cacheSec: 60 * 60,
 } as const;
 
 export const paramDef = {
diff --git a/packages/backend/src/server/api/endpoints/charts/federation.ts b/packages/backend/src/server/api/endpoints/charts/federation.ts
index f842f574e..8c35b3c46 100644
--- a/packages/backend/src/server/api/endpoints/charts/federation.ts
+++ b/packages/backend/src/server/api/endpoints/charts/federation.ts
@@ -1,11 +1,14 @@
-import define from '../../define.js';
 import { getJsonSchema } from '@/services/chart/core.js';
 import { federationChart } from '@/services/chart/index.js';
+import define from '../../define.js';
 
 export const meta = {
 	tags: ['charts'],
 
 	res: getJsonSchema(federationChart.schema),
+
+	allowGet: true,
+	cacheSec: 60 * 60,
 } as const;
 
 export const paramDef = {
diff --git a/packages/backend/src/server/api/endpoints/charts/hashtag.ts b/packages/backend/src/server/api/endpoints/charts/hashtag.ts
index 01407defd..77e24a62c 100644
--- a/packages/backend/src/server/api/endpoints/charts/hashtag.ts
+++ b/packages/backend/src/server/api/endpoints/charts/hashtag.ts
@@ -1,11 +1,14 @@
-import define from '../../define.js';
 import { getJsonSchema } from '@/services/chart/core.js';
 import { hashtagChart } from '@/services/chart/index.js';
+import define from '../../define.js';
 
 export const meta = {
 	tags: ['charts', 'hashtags'],
 
 	res: getJsonSchema(hashtagChart.schema),
+
+	allowGet: true,
+	cacheSec: 60 * 60,
 } as const;
 
 export const paramDef = {
diff --git a/packages/backend/src/server/api/endpoints/charts/instance.ts b/packages/backend/src/server/api/endpoints/charts/instance.ts
index 2d12951c6..817d51ad0 100644
--- a/packages/backend/src/server/api/endpoints/charts/instance.ts
+++ b/packages/backend/src/server/api/endpoints/charts/instance.ts
@@ -1,11 +1,14 @@
-import define from '../../define.js';
 import { getJsonSchema } from '@/services/chart/core.js';
 import { instanceChart } from '@/services/chart/index.js';
+import define from '../../define.js';
 
 export const meta = {
 	tags: ['charts'],
 
 	res: getJsonSchema(instanceChart.schema),
+
+	allowGet: true,
+	cacheSec: 60 * 60,
 } as const;
 
 export const paramDef = {
diff --git a/packages/backend/src/server/api/endpoints/charts/notes.ts b/packages/backend/src/server/api/endpoints/charts/notes.ts
index b6089f67e..951adf540 100644
--- a/packages/backend/src/server/api/endpoints/charts/notes.ts
+++ b/packages/backend/src/server/api/endpoints/charts/notes.ts
@@ -1,11 +1,14 @@
-import define from '../../define.js';
 import { getJsonSchema } from '@/services/chart/core.js';
 import { notesChart } from '@/services/chart/index.js';
+import define from '../../define.js';
 
 export const meta = {
 	tags: ['charts', 'notes'],
 
 	res: getJsonSchema(notesChart.schema),
+
+	allowGet: true,
+	cacheSec: 60 * 60,
 } as const;
 
 export const paramDef = {
diff --git a/packages/backend/src/server/api/endpoints/charts/user/drive.ts b/packages/backend/src/server/api/endpoints/charts/user/drive.ts
index e5db7131a..f165b4022 100644
--- a/packages/backend/src/server/api/endpoints/charts/user/drive.ts
+++ b/packages/backend/src/server/api/endpoints/charts/user/drive.ts
@@ -1,11 +1,14 @@
-import define from '../../../define.js';
 import { getJsonSchema } from '@/services/chart/core.js';
 import { perUserDriveChart } from '@/services/chart/index.js';
+import define from '../../../define.js';
 
 export const meta = {
 	tags: ['charts', 'drive', 'users'],
 
 	res: getJsonSchema(perUserDriveChart.schema),
+
+	allowGet: true,
+	cacheSec: 60 * 60,
 } as const;
 
 export const paramDef = {
diff --git a/packages/backend/src/server/api/endpoints/charts/user/following.ts b/packages/backend/src/server/api/endpoints/charts/user/following.ts
index 9b72de745..f5d42e21c 100644
--- a/packages/backend/src/server/api/endpoints/charts/user/following.ts
+++ b/packages/backend/src/server/api/endpoints/charts/user/following.ts
@@ -6,6 +6,9 @@ export const meta = {
 	tags: ['charts', 'users', 'following'],
 
 	res: getJsonSchema(perUserFollowingChart.schema),
+
+	allowGet: true,
+	cacheSec: 60 * 60,
 } as const;
 
 export const paramDef = {
diff --git a/packages/backend/src/server/api/endpoints/charts/user/notes.ts b/packages/backend/src/server/api/endpoints/charts/user/notes.ts
index 7cc6cbf31..aefe550d4 100644
--- a/packages/backend/src/server/api/endpoints/charts/user/notes.ts
+++ b/packages/backend/src/server/api/endpoints/charts/user/notes.ts
@@ -1,11 +1,14 @@
-import define from '../../../define.js';
 import { getJsonSchema } from '@/services/chart/core.js';
 import { perUserNotesChart } from '@/services/chart/index.js';
+import define from '../../../define.js';
 
 export const meta = {
 	tags: ['charts', 'users', 'notes'],
 
 	res: getJsonSchema(perUserNotesChart.schema),
+
+	allowGet: true,
+	cacheSec: 60 * 60,
 } as const;
 
 export const paramDef = {
diff --git a/packages/backend/src/server/api/endpoints/charts/user/reactions.ts b/packages/backend/src/server/api/endpoints/charts/user/reactions.ts
index 5c58a7f15..6bc6b56bf 100644
--- a/packages/backend/src/server/api/endpoints/charts/user/reactions.ts
+++ b/packages/backend/src/server/api/endpoints/charts/user/reactions.ts
@@ -1,11 +1,14 @@
-import define from '../../../define.js';
 import { getJsonSchema } from '@/services/chart/core.js';
 import { perUserReactionsChart } from '@/services/chart/index.js';
+import define from '../../../define.js';
 
 export const meta = {
 	tags: ['charts', 'users', 'reactions'],
 
 	res: getJsonSchema(perUserReactionsChart.schema),
+
+	allowGet: true,
+	cacheSec: 60 * 60,
 } as const;
 
 export const paramDef = {
diff --git a/packages/backend/src/server/api/endpoints/charts/users.ts b/packages/backend/src/server/api/endpoints/charts/users.ts
index 49c762b2e..338e8fd33 100644
--- a/packages/backend/src/server/api/endpoints/charts/users.ts
+++ b/packages/backend/src/server/api/endpoints/charts/users.ts
@@ -1,11 +1,14 @@
-import define from '../../define.js';
 import { getJsonSchema } from '@/services/chart/core.js';
 import { usersChart } from '@/services/chart/index.js';
+import define from '../../define.js';
 
 export const meta = {
 	tags: ['charts', 'users'],
 
 	res: getJsonSchema(usersChart.schema),
+
+	allowGet: true,
+	cacheSec: 60 * 60,
 } as const;
 
 export const paramDef = {
diff --git a/packages/backend/src/server/api/index.ts b/packages/backend/src/server/api/index.ts
index 02bec31b1..83ece51f5 100644
--- a/packages/backend/src/server/api/index.ts
+++ b/packages/backend/src/server/api/index.ts
@@ -8,6 +8,8 @@ import multer from '@koa/multer';
 import bodyParser from 'koa-bodyparser';
 import cors from '@koa/cors';
 
+import { Instances, AccessTokens, Users } from '@/models/index.js';
+import config from '@/config/index.js';
 import endpoints from './endpoints.js';
 import handler from './api-handler.js';
 import signup from './private/signup.js';
@@ -16,8 +18,6 @@ import signupPending from './private/signup-pending.js';
 import discord from './service/discord.js';
 import github from './service/github.js';
 import twitter from './service/twitter.js';
-import { Instances, AccessTokens, Users } from '@/models/index.js';
-import config from '@/config/index.js';
 
 // Init app
 const app = new Koa();
@@ -56,11 +56,24 @@ for (const endpoint of endpoints) {
 	if (endpoint.meta.requireFile) {
 		router.post(`/${endpoint.name}`, upload.single('file'), handler.bind(null, endpoint));
 	} else {
+		// 後方互換性のため
 		if (endpoint.name.includes('-')) {
-			// 後方互換性のため
 			router.post(`/${endpoint.name.replace(/-/g, '_')}`, handler.bind(null, endpoint));
+
+			if (endpoint.meta.allowGet) {
+				router.get(`/${endpoint.name.replace(/-/g, '_')}`, handler.bind(null, endpoint));
+			} else {
+				router.get(`/${endpoint.name.replace(/-/g, '_')}`, async ctx => { ctx.status = 405; });
+			}
 		}
+
 		router.post(`/${endpoint.name}`, handler.bind(null, endpoint));
+
+		if (endpoint.meta.allowGet) {
+			router.get(`/${endpoint.name}`, handler.bind(null, endpoint));
+		} else {
+			router.get(`/${endpoint.name}`, async ctx => { ctx.status = 405; });
+		}
 	}
 }
 
diff --git a/packages/client/src/components/chart.vue b/packages/client/src/components/chart.vue
index d9075dd07..fc7c4ff95 100644
--- a/packages/client/src/components/chart.vue
+++ b/packages/client/src/components/chart.vue
@@ -342,7 +342,7 @@ const exportData = () => {
 };
 
 const fetchFederationChart = async (): Promise<typeof chartData> => {
-	const raw = await os.api('charts/federation', { limit: props.limit, span: props.span });
+	const raw = await os.apiGet('charts/federation', { limit: props.limit, span: props.span });
 	return {
 		series: [{
 			name: 'Received',
@@ -392,7 +392,7 @@ const fetchFederationChart = async (): Promise<typeof chartData> => {
 };
 
 const fetchApRequestChart = async (): Promise<typeof chartData> => {
-	const raw = await os.api('charts/ap-request', { limit: props.limit, span: props.span });
+	const raw = await os.apiGet('charts/ap-request', { limit: props.limit, span: props.span });
 	return {
 		series: [{
 			name: 'In',
@@ -414,7 +414,7 @@ const fetchApRequestChart = async (): Promise<typeof chartData> => {
 };
 
 const fetchNotesChart = async (type: string): Promise<typeof chartData> => {
-	const raw = await os.api('charts/notes', { limit: props.limit, span: props.span });
+	const raw = await os.apiGet('charts/notes', { limit: props.limit, span: props.span });
 	return {
 		series: [{
 			name: 'All',
@@ -461,7 +461,7 @@ const fetchNotesChart = async (type: string): Promise<typeof chartData> => {
 };
 
 const fetchNotesTotalChart = async (): Promise<typeof chartData> => {
-	const raw = await os.api('charts/notes', { limit: props.limit, span: props.span });
+	const raw = await os.apiGet('charts/notes', { limit: props.limit, span: props.span });
 	return {
 		series: [{
 			name: 'Combined',
@@ -480,7 +480,7 @@ const fetchNotesTotalChart = async (): Promise<typeof chartData> => {
 };
 
 const fetchUsersChart = async (total: boolean): Promise<typeof chartData> => {
-	const raw = await os.api('charts/users', { limit: props.limit, span: props.span });
+	const raw = await os.apiGet('charts/users', { limit: props.limit, span: props.span });
 	return {
 		series: [{
 			name: 'Combined',
@@ -508,7 +508,7 @@ const fetchUsersChart = async (total: boolean): Promise<typeof chartData> => {
 };
 
 const fetchActiveUsersChart = async (): Promise<typeof chartData> => {
-	const raw = await os.api('charts/active-users', { limit: props.limit, span: props.span });
+	const raw = await os.apiGet('charts/active-users', { limit: props.limit, span: props.span });
 	return {
 		series: [{
 			name: 'Read & Write',
@@ -560,7 +560,7 @@ const fetchActiveUsersChart = async (): Promise<typeof chartData> => {
 };
 
 const fetchDriveChart = async (): Promise<typeof chartData> => {
-	const raw = await os.api('charts/drive', { limit: props.limit, span: props.span });
+	const raw = await os.apiGet('charts/drive', { limit: props.limit, span: props.span });
 	return {
 		bytes: true,
 		series: [{
@@ -596,7 +596,7 @@ const fetchDriveChart = async (): Promise<typeof chartData> => {
 };
 
 const fetchDriveFilesChart = async (): Promise<typeof chartData> => {
-	const raw = await os.api('charts/drive', { limit: props.limit, span: props.span });
+	const raw = await os.apiGet('charts/drive', { limit: props.limit, span: props.span });
 	return {
 		series: [{
 			name: 'All',
@@ -631,7 +631,7 @@ const fetchDriveFilesChart = async (): Promise<typeof chartData> => {
 };
 
 const fetchInstanceRequestsChart = async (): Promise<typeof chartData> => {
-	const raw = await os.api('charts/instance', { host: props.args.host, limit: props.limit, span: props.span });
+	const raw = await os.apiGet('charts/instance', { host: props.args.host, limit: props.limit, span: props.span });
 	return {
 		series: [{
 			name: 'In',
@@ -653,7 +653,7 @@ const fetchInstanceRequestsChart = async (): Promise<typeof chartData> => {
 };
 
 const fetchInstanceUsersChart = async (total: boolean): Promise<typeof chartData> => {
-	const raw = await os.api('charts/instance', { host: props.args.host, limit: props.limit, span: props.span });
+	const raw = await os.apiGet('charts/instance', { host: props.args.host, limit: props.limit, span: props.span });
 	return {
 		series: [{
 			name: 'Users',
@@ -668,7 +668,7 @@ const fetchInstanceUsersChart = async (total: boolean): Promise<typeof chartData
 };
 
 const fetchInstanceNotesChart = async (total: boolean): Promise<typeof chartData> => {
-	const raw = await os.api('charts/instance', { host: props.args.host, limit: props.limit, span: props.span });
+	const raw = await os.apiGet('charts/instance', { host: props.args.host, limit: props.limit, span: props.span });
 	return {
 		series: [{
 			name: 'Notes',
@@ -683,7 +683,7 @@ const fetchInstanceNotesChart = async (total: boolean): Promise<typeof chartData
 };
 
 const fetchInstanceFfChart = async (total: boolean): Promise<typeof chartData> => {
-	const raw = await os.api('charts/instance', { host: props.args.host, limit: props.limit, span: props.span });
+	const raw = await os.apiGet('charts/instance', { host: props.args.host, limit: props.limit, span: props.span });
 	return {
 		series: [{
 			name: 'Following',
@@ -706,7 +706,7 @@ const fetchInstanceFfChart = async (total: boolean): Promise<typeof chartData> =
 };
 
 const fetchInstanceDriveUsageChart = async (total: boolean): Promise<typeof chartData> => {
-	const raw = await os.api('charts/instance', { host: props.args.host, limit: props.limit, span: props.span });
+	const raw = await os.apiGet('charts/instance', { host: props.args.host, limit: props.limit, span: props.span });
 	return {
 		bytes: true,
 		series: [{
@@ -722,7 +722,7 @@ const fetchInstanceDriveUsageChart = async (total: boolean): Promise<typeof char
 };
 
 const fetchInstanceDriveFilesChart = async (total: boolean): Promise<typeof chartData> => {
-	const raw = await os.api('charts/instance', { host: props.args.host, limit: props.limit, span: props.span });
+	const raw = await os.apiGet('charts/instance', { host: props.args.host, limit: props.limit, span: props.span });
 	return {
 		series: [{
 			name: 'Drive files',
@@ -737,7 +737,7 @@ const fetchInstanceDriveFilesChart = async (total: boolean): Promise<typeof char
 };
 
 const fetchPerUserNotesChart = async (): Promise<typeof chartData> => {
-	const raw = await os.api('charts/user/notes', { userId: props.args.user.id, limit: props.limit, span: props.span });
+	const raw = await os.apiGet('charts/user/notes', { userId: props.args.user.id, limit: props.limit, span: props.span });
 	return {
 		series: [...(props.args.withoutAll ? [] : [{
 			name: 'All',
@@ -769,7 +769,7 @@ const fetchPerUserNotesChart = async (): Promise<typeof chartData> => {
 };
 
 const fetchPerUserFollowingChart = async (): Promise<typeof chartData> => {
-	const raw = await os.api('charts/user/following', { userId: props.args.user.id, limit: props.limit, span: props.span });
+	const raw = await os.apiGet('charts/user/following', { userId: props.args.user.id, limit: props.limit, span: props.span });
 	return {
 		series: [{
 			name: 'Local',
@@ -784,7 +784,7 @@ const fetchPerUserFollowingChart = async (): Promise<typeof chartData> => {
 };
 
 const fetchPerUserFollowersChart = async (): Promise<typeof chartData> => {
-	const raw = await os.api('charts/user/following', { userId: props.args.user.id, limit: props.limit, span: props.span });
+	const raw = await os.apiGet('charts/user/following', { userId: props.args.user.id, limit: props.limit, span: props.span });
 	return {
 		series: [{
 			name: 'Local',
@@ -799,7 +799,7 @@ const fetchPerUserFollowersChart = async (): Promise<typeof chartData> => {
 };
 
 const fetchPerUserDriveChart = async (): Promise<typeof chartData> => {
-	const raw = await os.api('charts/user/drive', { userId: props.args.user.id, limit: props.limit, span: props.span });
+	const raw = await os.apiGet('charts/user/drive', { userId: props.args.user.id, limit: props.limit, span: props.span });
 	return {
 		series: [{
 			name: 'Inc',
diff --git a/packages/client/src/components/instance-card-mini.vue b/packages/client/src/components/instance-card-mini.vue
index 0bac6c0ad..de16dacf7 100644
--- a/packages/client/src/components/instance-card-mini.vue
+++ b/packages/client/src/components/instance-card-mini.vue
@@ -20,7 +20,7 @@ const props = defineProps<{
 
 const chart = $ref(null);
 
-os.api('charts/instance', { host: props.instance.host, limit: 16, span: 'day' }).then(res => {
+os.apiGet('charts/instance', { host: props.instance.host, limit: 16, span: 'day' }).then(res => {
 	chart = res;
 });
 </script>
diff --git a/packages/client/src/components/user-card-mini.vue b/packages/client/src/components/user-card-mini.vue
index d83e4a56f..2c3e0fe95 100644
--- a/packages/client/src/components/user-card-mini.vue
+++ b/packages/client/src/components/user-card-mini.vue
@@ -21,7 +21,7 @@ const props = defineProps<{
 
 const chart = $ref(null);
 
-os.api('charts/user/notes', { userId: props.user.id, limit: 16, span: 'day' }).then(res => {
+os.apiGet('charts/user/notes', { userId: props.user.id, limit: 16, span: 'day' }).then(res => {
 	chart = res;
 });
 </script>
diff --git a/packages/client/src/os.ts b/packages/client/src/os.ts
index e823d3719..00dae867d 100644
--- a/packages/client/src/os.ts
+++ b/packages/client/src/os.ts
@@ -52,6 +52,39 @@ export const api = ((endpoint: string, data: Record<string, any> = {}, token?: s
 	return promise;
 }) as typeof apiClient.request;
 
+export const apiGet = ((endpoint: string, data: Record<string, any> = {}) => {
+	pendingApiRequestsCount.value++;
+
+	const onFinally = () => {
+		pendingApiRequestsCount.value--;
+	};
+
+	const query = new URLSearchParams(data);
+
+	const promise = new Promise((resolve, reject) => {
+		// Send request
+		fetch(`${apiUrl}/${endpoint}?${query}`, {
+			method: 'GET',
+			credentials: 'omit',
+			cache: 'default',
+		}).then(async (res) => {
+			const body = res.status === 204 ? null : await res.json();
+
+			if (res.status === 200) {
+				resolve(body);
+			} else if (res.status === 204) {
+				resolve();
+			} else {
+				reject(body.error);
+			}
+		}).catch(reject);
+	});
+
+	promise.then(onFinally, onFinally);
+
+	return promise;
+}) as typeof apiClient.request;
+
 export const apiWithDialog = ((
 	endpoint: string,
 	data: Record<string, any> = {},
diff --git a/packages/client/src/pages/admin/overview.vue b/packages/client/src/pages/admin/overview.vue
index 82b3c3385..f81f6104c 100644
--- a/packages/client/src/pages/admin/overview.vue
+++ b/packages/client/src/pages/admin/overview.vue
@@ -90,11 +90,11 @@ onMounted(async () => {
 	os.api('stats', {}).then(statsResponse => {
 		stats = statsResponse;
 
-		os.api('charts/users', { limit: 2, span: 'day' }).then(chart => {
+		os.apiGet('charts/users', { limit: 2, span: 'day' }).then(chart => {
 			usersComparedToThePrevDay = stats.originalUsersCount - chart.local.total[1];
 		});
 
-		os.api('charts/notes', { limit: 2, span: 'day' }).then(chart => {
+		os.apiGet('charts/notes', { limit: 2, span: 'day' }).then(chart => {
 			notesComparedToThePrevDay = stats.originalNotesCount - chart.local.total[1];
 		});
 	});
diff --git a/packages/client/src/widgets/activity.vue b/packages/client/src/widgets/activity.vue
index 7fb9f5894..265bde4a3 100644
--- a/packages/client/src/widgets/activity.vue
+++ b/packages/client/src/widgets/activity.vue
@@ -15,12 +15,12 @@
 
 <script lang="ts" setup>
 import { onMounted, onUnmounted, reactive, ref, watch } from 'vue';
-import { GetFormResultType } from '@/scripts/form';
 import { useWidgetPropsManager, Widget, WidgetComponentEmits, WidgetComponentExpose, WidgetComponentProps } from './widget';
-import * as os from '@/os';
-import MkContainer from '@/components/ui/container.vue';
 import XCalendar from './activity.calendar.vue';
 import XChart from './activity.chart.vue';
+import { GetFormResultType } from '@/scripts/form';
+import * as os from '@/os';
+import MkContainer from '@/components/ui/container.vue';
 import { $i } from '@/account';
 
 const name = 'activity';
@@ -67,7 +67,7 @@ const toggleView = () => {
 	save();
 };
 
-os.api('charts/user/notes', {
+os.apiGet('charts/user/notes', {
 	userId: $i.id,
 	span: 'day',
 	limit: 7 * 21,
@@ -76,7 +76,7 @@ os.api('charts/user/notes', {
 		total: res.diffs.normal[i] + res.diffs.reply[i] + res.diffs.renote[i],
 		notes: res.diffs.normal[i],
 		replies: res.diffs.reply[i],
-		renotes: res.diffs.renote[i]
+		renotes: res.diffs.renote[i],
 	}));
 	fetching.value = false;
 });
diff --git a/packages/client/src/widgets/federation.vue b/packages/client/src/widgets/federation.vue
index a3862077b..afe7af0e9 100644
--- a/packages/client/src/widgets/federation.vue
+++ b/packages/client/src/widgets/federation.vue
@@ -20,8 +20,8 @@
 
 <script lang="ts" setup>
 import { onMounted, onUnmounted, ref } from 'vue';
-import { GetFormResultType } from '@/scripts/form';
 import { useWidgetPropsManager, Widget, WidgetComponentEmits, WidgetComponentExpose, WidgetComponentProps } from './widget';
+import { GetFormResultType } from '@/scripts/form';
 import MkContainer from '@/components/ui/container.vue';
 import MkMiniChart from '@/components/mini-chart.vue';
 import * as os from '@/os';
@@ -56,9 +56,9 @@ const fetching = ref(true);
 const fetch = async () => {
 	const fetchedInstances = await os.api('federation/instances', {
 		sort: '+lastCommunicatedAt',
-		limit: 5
+		limit: 5,
 	});
-	const fetchedCharts = await Promise.all(fetchedInstances.map(i => os.api('charts/instance', { host: i.host, limit: 16, span: 'hour' })));
+	const fetchedCharts = await Promise.all(fetchedInstances.map(i => os.apiGet('charts/instance', { host: i.host, limit: 16, span: 'hour' })));
 	instances.value = fetchedInstances;
 	charts.value = fetchedCharts;
 	fetching.value = false;