diff --git a/packages/backend/src/server/api/endpoints/following/create.ts b/packages/backend/src/server/api/endpoints/following/create.ts
index db320e712..3c27af604 100644
--- a/packages/backend/src/server/api/endpoints/following/create.ts
+++ b/packages/backend/src/server/api/endpoints/following/create.ts
@@ -58,6 +58,12 @@ export const meta = {
 			code: 'BLOCKED',
 			id: 'c4ab57cc-4e41-45e9-bfd9-584f61e35ce0',
 		},
+
+		followingAnotherBot: {
+			message: 'Following another bot account is not allowed.',
+			code: 'FOLLOWING_BOT_NOT_ALLOWED',
+			id: '9a61d572-4a95-7f6b-b595-2817d42017b0',
+		},
 	},
 
 	res: {
@@ -100,6 +106,10 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				throw err;
 			});
 
+			if ( me.isBot && followee.isBot ) {
+				throw new ApiError(meta.errors.followingAnotherBot);
+			}
+
 			try {
 				await this.userFollowingService.follow(follower, followee, { withReplies: ps.withReplies });
 			} catch (e) {
diff --git a/packages/backend/src/server/api/endpoints/notes/create.ts b/packages/backend/src/server/api/endpoints/notes/create.ts
index 812c1a45b..5bff7f718 100644
--- a/packages/backend/src/server/api/endpoints/notes/create.ts
+++ b/packages/backend/src/server/api/endpoints/notes/create.ts
@@ -141,6 +141,13 @@ export const meta = {
 			code: 'CONTAINS_TOO_MANY_MENTIONS',
 			id: '4de0363a-3046-481b-9b0f-feff3e211025',
 		},
+
+		replyingToAnotherBot: {
+			message: 'Replying to another bot account is not allowed.',
+			code: 'REPLY_TO_BOT_NOT_ALLOWED',
+			id: '66819f28-9525-389d-4b0a-4974363fbbbf',
+		},
+
 	},
 } as const;
 
@@ -375,6 +382,11 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 					throw new ApiError(meta.errors.cannotReplyToInvisibleNote);
 				} else if (reply.visibility === 'specified' && ps.visibility !== 'specified') {
 					throw new ApiError(meta.errors.cannotReplyToSpecifiedVisibilityNoteWithExtendedVisibility);
+				} else if ( me.isBot ) {
+					const replayuser = await this.usersRepository.findOneBy({ id: reply.userId });
+					if (replayuser?.isBot) {
+						throw new ApiError(meta.errors.replyingToAnotherBot);
+					}
 				}
 
 				// Check blocking
diff --git a/packages/misskey-js/src/autogen/types.ts b/packages/misskey-js/src/autogen/types.ts
index ddfb6085c..72b84f2db 100644
--- a/packages/misskey-js/src/autogen/types.ts
+++ b/packages/misskey-js/src/autogen/types.ts
@@ -4910,6 +4910,7 @@ export type components = {
       canSearchNotes: boolean;
       canUseTranslator: boolean;
       canUseDriveFileInSoundSettings: boolean;
+      canUseReaction: boolean;
       canHideAds: boolean;
       driveCapacityMb: number;
       alwaysMarkNsfw: boolean;