diff --git a/packages/backend/src/server/api/endpoints/federation/followers.ts b/packages/backend/src/server/api/endpoints/federation/followers.ts
index be1d6c8e58..51a60e1dce 100644
--- a/packages/backend/src/server/api/endpoints/federation/followers.ts
+++ b/packages/backend/src/server/api/endpoints/federation/followers.ts
@@ -5,36 +5,10 @@ import { QueryService } from '@/core/QueryService.js';
 import { FollowingEntityService } from '@/core/entities/FollowingEntityService.js';
 import { DI } from '@/di-symbols.js';
 
-export const meta = {
-	tags: ['federation'],
-
-	requireCredential: false,
-
-	res: {
-		type: 'array',
-		optional: false, nullable: false,
-		items: {
-			type: 'object',
-			optional: false, nullable: false,
-			ref: 'Following',
-		},
-	},
-} as const;
-
-export const paramDef = {
-	type: 'object',
-	properties: {
-		host: { type: 'string' },
-		sinceId: { type: 'string', format: 'misskey:id' },
-		untilId: { type: 'string', format: 'misskey:id' },
-		limit: { type: 'integer', minimum: 1, maximum: 100, default: 10 },
-	},
-	required: ['host'],
-} as const;
-
 // eslint-disable-next-line import/no-default-export
 @Injectable()
-export default class extends Endpoint<typeof meta, typeof paramDef> {
+export default class extends Endpoint<'federation/followers'> {
+	name = 'federation/followers' as const;
 	constructor(
 		@Inject(DI.followingsRepository)
 		private followingsRepository: FollowingsRepository,
@@ -42,7 +16,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 		private followingEntityService: FollowingEntityService,
 		private queryService: QueryService,
 	) {
-		super(meta, paramDef, async (ps, me) => {
+		super(async (ps, me) => {
 			const query = this.queryService.makePaginationQuery(this.followingsRepository.createQueryBuilder('following'), ps.sinceId, ps.untilId)
 				.andWhere('following.followeeHost = :host', { host: ps.host });
 
diff --git a/packages/backend/src/server/api/endpoints/federation/following.ts b/packages/backend/src/server/api/endpoints/federation/following.ts
index 74656ce863..01dea5b42e 100644
--- a/packages/backend/src/server/api/endpoints/federation/following.ts
+++ b/packages/backend/src/server/api/endpoints/federation/following.ts
@@ -5,36 +5,10 @@ import { QueryService } from '@/core/QueryService.js';
 import { FollowingEntityService } from '@/core/entities/FollowingEntityService.js';
 import { DI } from '@/di-symbols.js';
 
-export const meta = {
-	tags: ['federation'],
-
-	requireCredential: false,
-
-	res: {
-		type: 'array',
-		optional: false, nullable: false,
-		items: {
-			type: 'object',
-			optional: false, nullable: false,
-			ref: 'Following',
-		},
-	},
-} as const;
-
-export const paramDef = {
-	type: 'object',
-	properties: {
-		host: { type: 'string' },
-		sinceId: { type: 'string', format: 'misskey:id' },
-		untilId: { type: 'string', format: 'misskey:id' },
-		limit: { type: 'integer', minimum: 1, maximum: 100, default: 10 },
-	},
-	required: ['host'],
-} as const;
-
 // eslint-disable-next-line import/no-default-export
 @Injectable()
-export default class extends Endpoint<typeof meta, typeof paramDef> {
+export default class extends Endpoint<'federation/followings'> {
+	name = 'federation/followings' as const;
 	constructor(
 		@Inject(DI.followingsRepository)
 		private followingsRepository: FollowingsRepository,
@@ -42,7 +16,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 		private followingEntityService: FollowingEntityService,
 		private queryService: QueryService,
 	) {
-		super(meta, paramDef, async (ps, me) => {
+		super(async (ps, me) => {
 			const query = this.queryService.makePaginationQuery(this.followingsRepository.createQueryBuilder('following'), ps.sinceId, ps.untilId)
 				.andWhere('following.followerHost = :host', { host: ps.host });
 
diff --git a/packages/backend/src/server/api/endpoints/federation/instances.ts b/packages/backend/src/server/api/endpoints/federation/instances.ts
index 061c6eb5be..85901262f7 100644
--- a/packages/backend/src/server/api/endpoints/federation/instances.ts
+++ b/packages/backend/src/server/api/endpoints/federation/instances.ts
@@ -6,44 +6,10 @@ import { MetaService } from '@/core/MetaService.js';
 import { DI } from '@/di-symbols.js';
 import { sqlLikeEscape } from '@/misc/sql-like-escape.js';
 
-export const meta = {
-	tags: ['federation'],
-
-	requireCredential: false,
-	allowGet: true,
-	cacheSec: 3600,
-
-	res: {
-		type: 'array',
-		optional: false, nullable: false,
-		items: {
-			type: 'object',
-			optional: false, nullable: false,
-			ref: 'FederationInstance',
-		},
-	},
-} as const;
-
-export const paramDef = {
-	type: 'object',
-	properties: {
-		host: { type: 'string', nullable: true, description: 'Omit or use `null` to not filter by host.' },
-		blocked: { type: 'boolean', nullable: true },
-		notResponding: { type: 'boolean', nullable: true },
-		suspended: { type: 'boolean', nullable: true },
-		federating: { type: 'boolean', nullable: true },
-		subscribing: { type: 'boolean', nullable: true },
-		publishing: { type: 'boolean', nullable: true },
-		limit: { type: 'integer', minimum: 1, maximum: 100, default: 30 },
-		offset: { type: 'integer', default: 0 },
-		sort: { type: 'string' },
-	},
-	required: [],
-} as const;
-
 // eslint-disable-next-line import/no-default-export
 @Injectable()
-export default class extends Endpoint<typeof meta, typeof paramDef> {
+export default class extends Endpoint<'federation/instances'> {
+	name = 'federation/instances' as const;
 	constructor(
 		@Inject(DI.instancesRepository)
 		private instancesRepository: InstancesRepository,
@@ -51,7 +17,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 		private instanceEntityService: InstanceEntityService,
 		private metaService: MetaService,
 	) {
-		super(meta, paramDef, async (ps, me) => {
+		super(async (ps, me) => {
 			const query = this.instancesRepository.createQueryBuilder('instance');
 
 			switch (ps.sort) {
diff --git a/packages/backend/src/server/api/endpoints/federation/show-instance.ts b/packages/backend/src/server/api/endpoints/federation/show-instance.ts
index 66502748b3..b799efcd4a 100644
--- a/packages/backend/src/server/api/endpoints/federation/show-instance.ts
+++ b/packages/backend/src/server/api/endpoints/federation/show-instance.ts
@@ -5,32 +5,10 @@ import { InstanceEntityService } from '@/core/entities/InstanceEntityService.js'
 import { UtilityService } from '@/core/UtilityService.js';
 import { DI } from '@/di-symbols.js';
 
-export const meta = {
-	tags: ['federation'],
-
-	requireCredential: false,
-
-	res: {
-		oneOf: [{
-			type: 'object',
-			ref: 'FederationInstance',
-		}, {
-			type: 'null',
-		}],
-	},
-} as const;
-
-export const paramDef = {
-	type: 'object',
-	properties: {
-		host: { type: 'string' },
-	},
-	required: ['host'],
-} as const;
-
 // eslint-disable-next-line import/no-default-export
 @Injectable()
-export default class extends Endpoint<typeof meta, typeof paramDef> {
+export default class extends Endpoint<'federation/show-instance'> {
+	name = 'federation/show-instance' as const;
 	constructor(
 		@Inject(DI.instancesRepository)
 		private instancesRepository: InstancesRepository,
@@ -38,7 +16,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 		private utilityService: UtilityService,
 		private instanceEntityService: InstanceEntityService,
 	) {
-		super(meta, paramDef, async (ps, me) => {
+		super(async (ps, me) => {
 			const instance = await this.instancesRepository
 				.findOneBy({ host: this.utilityService.toPuny(ps.host) });
 
diff --git a/packages/backend/src/server/api/endpoints/federation/stats.ts b/packages/backend/src/server/api/endpoints/federation/stats.ts
index 19418e698c..11dc7ad325 100644
--- a/packages/backend/src/server/api/endpoints/federation/stats.ts
+++ b/packages/backend/src/server/api/endpoints/federation/stats.ts
@@ -25,7 +25,8 @@ export const paramDef = {
 
 // eslint-disable-next-line import/no-default-export
 @Injectable()
-export default class extends Endpoint<typeof meta, typeof paramDef> {
+export default class extends Endpoint<'federation/stats'> {
+	name = 'federation/stats' as const;
 	constructor(
 		@Inject(DI.instancesRepository)
 		private instancesRepository: InstancesRepository,
@@ -35,7 +36,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 
 		private instanceEntityService: InstanceEntityService,
 	) {
-		super(meta, paramDef, async (ps, me) => {
+		super(async (ps, me) => {
 			const [topSubInstances, topPubInstances, allSubCount, allPubCount] = await Promise.all([
 				this.instancesRepository.find({
 					where: {
diff --git a/packages/backend/src/server/api/endpoints/federation/update-remote-user.ts b/packages/backend/src/server/api/endpoints/federation/update-remote-user.ts
index 4596e0c0b5..858a893db0 100644
--- a/packages/backend/src/server/api/endpoints/federation/update-remote-user.ts
+++ b/packages/backend/src/server/api/endpoints/federation/update-remote-user.ts
@@ -3,28 +3,15 @@ import { Endpoint } from '@/server/api/endpoint-base.js';
 import { ApPersonService } from '@/core/activitypub/models/ApPersonService.js';
 import { GetterService } from '@/server/api/GetterService.js';
 
-export const meta = {
-	tags: ['federation'],
-
-	requireCredential: true,
-} as const;
-
-export const paramDef = {
-	type: 'object',
-	properties: {
-		userId: { type: 'string', format: 'misskey:id' },
-	},
-	required: ['userId'],
-} as const;
-
 // eslint-disable-next-line import/no-default-export
 @Injectable()
-export default class extends Endpoint<typeof meta, typeof paramDef> {
+export default class extends Endpoint<'federation/update-remote-user'> {
+	name = 'federation/update-remote-user' as const;
 	constructor(
 		private getterService: GetterService,
 		private apPersonService: ApPersonService,
 	) {
-		super(meta, paramDef, async (ps) => {
+		super(async (ps) => {
 			const user = await this.getterService.getRemoteUser(ps.userId);
 			await this.apPersonService.updatePerson(user.uri!);
 		});
diff --git a/packages/backend/src/server/api/endpoints/federation/users.ts b/packages/backend/src/server/api/endpoints/federation/users.ts
index a028930f21..708ef9b598 100644
--- a/packages/backend/src/server/api/endpoints/federation/users.ts
+++ b/packages/backend/src/server/api/endpoints/federation/users.ts
@@ -5,36 +5,10 @@ import { QueryService } from '@/core/QueryService.js';
 import { UserEntityService } from '@/core/entities/UserEntityService.js';
 import { DI } from '@/di-symbols.js';
 
-export const meta = {
-	tags: ['federation'],
-
-	requireCredential: false,
-
-	res: {
-		type: 'array',
-		optional: false, nullable: false,
-		items: {
-			type: 'object',
-			optional: false, nullable: false,
-			ref: 'UserDetailedNotMe',
-		},
-	},
-} as const;
-
-export const paramDef = {
-	type: 'object',
-	properties: {
-		host: { type: 'string' },
-		sinceId: { type: 'string', format: 'misskey:id' },
-		untilId: { type: 'string', format: 'misskey:id' },
-		limit: { type: 'integer', minimum: 1, maximum: 100, default: 10 },
-	},
-	required: ['host'],
-} as const;
-
 // eslint-disable-next-line import/no-default-export
 @Injectable()
-export default class extends Endpoint<typeof meta, typeof paramDef> {
+export default class extends Endpoint<'federation/users'> {
+	name = 'federation/users' as const;
 	constructor(
 		@Inject(DI.usersRepository)
 		private usersRepository: UsersRepository,
@@ -42,7 +16,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 		private userEntityService: UserEntityService,
 		private queryService: QueryService,
 	) {
-		super(meta, paramDef, async (ps, me) => {
+		super(async (ps, me) => {
 			const query = this.queryService.makePaginationQuery(this.usersRepository.createQueryBuilder('user'), ps.sinceId, ps.untilId)
 				.andWhere('user.host = :host', { host: ps.host });
 
diff --git a/packages/misskey-js/src/endpoints.ts b/packages/misskey-js/src/endpoints.ts
index 236ff8bb09..8c750ff928 100644
--- a/packages/misskey-js/src/endpoints.ts
+++ b/packages/misskey-js/src/endpoints.ts
@@ -4104,9 +4104,21 @@ export const endpoints = {
 					limit: { type: 'integer', minimum: 1, maximum: 100, default: 10 },
 					sinceId: { type: 'string', format: 'misskey:id' },
 					untilId: { type: 'string', format: 'misskey:id' },
-					folderId: { type: 'string', format: 'misskey:id', nullable: true, default: null },
-					type: { type: 'string', nullable: true, pattern: /^[a-zA-Z\/\-*]+$/.toString().slice(1, -1) },
-					sort: { type: 'string', nullable: true, enum: ['+createdAt', '-createdAt', '+name', '-name', '+size', '-size'] },
+					folderId: {
+						oneOf: [
+							{ type: 'string', format: 'misskey:id' },
+							{ type: 'null' },
+						],
+						default: null,
+					},
+					type: {
+						oneOf: [
+							{ type: 'string', pattern: /^[a-zA-Z\/\-*]+$/.toString().slice(1, -1) },
+							{ type: 'null' },
+						],
+						default: null,
+					},
+					sort: { enum: [null, '+createdAt', '-createdAt', '+name', '-name', '+size', '-size'] },
 				},
 				required: [],
 			},
@@ -4132,7 +4144,13 @@ export const endpoints = {
 					limit: { type: 'integer', minimum: 1, maximum: 100, default: 10 },
 					sinceId: { type: 'string', format: 'misskey:id' },
 					untilId: { type: 'string', format: 'misskey:id' },
-					folderId: { type: 'string', format: 'misskey:id', nullable: true, default: null },
+					folderId: {
+						oneOf: [
+							{ type: 'string', format: 'misskey:id' },
+							{ type: 'null' },
+						],
+						default: null,
+					},
 				},
 				required: [],
 			},
@@ -4174,9 +4192,9 @@ export const endpoints = {
 
 	'email-address/available': {
 		tags: ['users'],
-	
+
 		requireCredential: false,
-	
+
 		defines: [{
 			req: {
 				type: 'object',
@@ -4190,10 +4208,7 @@ export const endpoints = {
 				properties: {
 					available: { type: 'boolean' },
 					reason: {
-						oneOf: [
-							{ type: 'string', enum: ['used', 'format', 'disposable', 'mx', 'smtp'] },
-							{ type: 'null' },
-						],
+						enum: [null, 'used', 'format', 'disposable', 'mx', 'smtp']
 					},
 				},
 				required: [
@@ -4203,6 +4218,198 @@ export const endpoints = {
 			},
 		}],
 	},
+
+	//#region federation
+	'federation/followers': {
+		tags: ['federation'],
+
+		requireCredential: false,
+
+		defines: [{
+			req: {
+				type: 'object',
+				properties: {
+					host: { type: 'string' },
+					sinceId: { type: 'string', format: 'misskey:id' },
+					untilId: { type: 'string', format: 'misskey:id' },
+					limit: { type: 'integer', minimum: 1, maximum: 100, default: 10 },
+				},
+				required: ['host'],
+			},
+			res: {
+				type: 'array',
+				items: {
+					$ref: 'https://misskey-hub.net/api/schemas/Following',
+				},
+			}
+		}]
+	},
+	'federation/followings': {
+		tags: ['federation'],
+
+		requireCredential: false,
+
+		defines: [{
+			req: {
+				type: 'object',
+				properties: {
+					host: { type: 'string' },
+					sinceId: { type: 'string', format: 'misskey:id' },
+					untilId: { type: 'string', format: 'misskey:id' },
+					limit: { type: 'integer', minimum: 1, maximum: 100, default: 10 },
+				},
+				required: ['host'],
+			},
+			res: {
+				type: 'array',
+				items: {
+					$ref: 'https://misskey-hub.net/api/schemas/Following',
+				},
+			}
+		}]
+	},
+	'federation/instances': {
+		tags: ['federation'],
+
+		requireCredential: false,
+		allowGet: true,
+		cacheSec: 3600,
+
+		defines: [{
+			req: {
+				type: 'object',
+				properties: {
+					host: { type: ['string', 'null'], description: 'Omit or use `null` to not filter by host.' },
+					blocked: { type: ['boolean', 'null'] },
+					notResponding: { type: ['boolean', 'null'] },
+					suspended: { type: ['boolean', 'null'] },
+					federating: { type: ['boolean', 'null'] },
+					subscribing: { type: ['boolean', 'null'] },
+					publishing: { type: ['boolean', 'null'] },
+					limit: { type: 'integer', minimum: 1, maximum: 100, default: 30 },
+					offset: { type: 'integer', default: 0 },
+					sort: { type: 'string' },
+				},
+				required: [],
+			},
+			res: {
+				type: 'array',
+				items: {
+					$ref: 'https://misskey-hub.net/api/schemas/FederationInstance',
+				},
+			},
+		}],
+	},
+	'federation/show-instance': {
+		tags: ['federation'],
+
+		requireCredential: false,
+
+		defines: [{
+			req: {
+				type: 'object',
+				properties: {
+					host: { type: 'string' },
+				},
+				required: ['host'],
+			},
+			res: {
+				oneOf: [{
+					$ref: 'https://misskey-hub.net/api/schemas/FederationInstance',
+				}, {
+					type: 'null',
+				}],
+			}
+		}]
+	},
+	'federation/stats': {
+		tags: ['federation'],
+
+		requireCredential: false,
+
+		allowGet: true,
+		cacheSec: 60 * 60,
+
+		defines: [{
+			req: {
+				type: 'object',
+				properties: {
+					limit: { type: 'integer', minimum: 1, maximum: 100, default: 10 },
+				},
+				required: [],
+			},
+			res: {
+				type: 'object',
+				properties: {
+					topSubInstances: {
+						type: 'array',
+						items: {
+							$ref: 'https://misskey-hub.net/api/schemas/FederationInstance',
+						},
+					},
+					otherFollowersCount: {
+						type: 'number',
+					},
+					topPubInstances: {
+						type: 'array',
+						items: {
+							$ref: 'https://misskey-hub.net/api/schemas/FederationInstance',
+						},
+					},
+					otherFollowingCount: {
+						type: 'number',
+					},
+				},
+				required: [
+					'topSubInstances',
+					'otherFollowersCount',
+					'topPubInstances',
+					'otherFollowingCount',
+				],
+			},
+		}],
+	},
+	'federation/update-remote-user': {
+		tags: ['federation'],
+
+		requireCredential: true,
+
+		defines: [{
+			req: {
+				type: 'object',
+				properties: {
+					userId: { type: 'string', format: 'misskey:id' },
+				},
+				required: ['userId'],
+			},
+			res: undefined,
+		}],
+	},
+	'federation/users': {
+		tags: ['federation'],
+
+		requireCredential: false,
+
+		defines: [{
+			req: {
+				type: 'object',
+				properties: {
+					host: { type: 'string' },
+					sinceId: { type: 'string', format: 'misskey:id' },
+					untilId: { type: 'string', format: 'misskey:id' },
+					limit: { type: 'integer', minimum: 1, maximum: 100, default: 10 },
+				},
+				required: ['host'],
+			},
+			res: {
+				type: 'array',
+				items: {
+					$ref: 'https://misskey-hub.net/api/schemas/UserDetailedNotMe',
+				},
+			},
+		}],
+	},
+	//#endregion
 } as const satisfies { [x: string]: IEndpointMeta; };
 
 /**