diff --git a/src/server/api/endpoints/drive/files/attached-notes.ts b/src/server/api/endpoints/drive/files/attached-notes.ts
index c1d828b05..c9eeab58c 100644
--- a/src/server/api/endpoints/drive/files/attached-notes.ts
+++ b/src/server/api/endpoints/drive/files/attached-notes.ts
@@ -30,6 +30,13 @@ export const meta = {
 		}
 	},
 
+	res: {
+		type: 'array',
+		items: {
+			type: 'Note',
+		},
+	},
+
 	errors: {
 		noSuchFile: {
 			message: 'No such file.',
diff --git a/src/server/api/endpoints/drive/files/check-existence.ts b/src/server/api/endpoints/drive/files/check-existence.ts
index 12680d541..926411c83 100644
--- a/src/server/api/endpoints/drive/files/check-existence.ts
+++ b/src/server/api/endpoints/drive/files/check-existence.ts
@@ -21,7 +21,11 @@ export const meta = {
 				'ja-JP': 'ファイルのMD5ハッシュ'
 			}
 		}
-	}
+	},
+
+	res: {
+		type: 'DriveFile',
+	},
 };
 
 export default define(meta, async (ps, user) => {
diff --git a/src/server/api/endpoints/drive/stream.ts b/src/server/api/endpoints/drive/stream.ts
index f6586a852..916482be4 100644
--- a/src/server/api/endpoints/drive/stream.ts
+++ b/src/server/api/endpoints/drive/stream.ts
@@ -29,7 +29,14 @@ export const meta = {
 		type: {
 			validator: $.optional.str.match(/^[a-zA-Z\/\-\*]+$/)
 		}
-	}
+	},
+
+	res: {
+		type: 'array',
+		items: {
+			type: 'DriveFile',
+		},
+	},
 };
 
 export default define(meta, async (ps, user) => {
diff --git a/src/server/api/endpoints/i/notifications.ts b/src/server/api/endpoints/i/notifications.ts
index 3d038e5d3..d3e3064ab 100644
--- a/src/server/api/endpoints/i/notifications.ts
+++ b/src/server/api/endpoints/i/notifications.ts
@@ -54,7 +54,14 @@ export const meta = {
 			validator: $.optional.arr($.str.or(['follow', 'mention', 'reply', 'renote', 'quote', 'reaction', 'poll_vote', 'receiveFollowRequest'])),
 			default: [] as string[]
 		}
-	}
+	},
+
+	res: {
+		type: 'array',
+		items: {
+			type: 'Notification',
+		},
+	},
 };
 
 export default define(meta, async (ps, user) => {
diff --git a/src/server/api/openapi/schemas.ts b/src/server/api/openapi/schemas.ts
index 6450dcb3f..a57be8150 100644
--- a/src/server/api/openapi/schemas.ts
+++ b/src/server/api/openapi/schemas.ts
@@ -146,6 +146,28 @@ export const schemas = {
 		required: ['id', 'userId', 'createdAt']
 	},
 
+	Notification: {
+		type: 'object',
+		properties: {
+			id: {
+				type: 'string',
+				format: 'id',
+				description: 'The unique identifier for this notification.'
+			},
+			createdAt: {
+				type: 'string',
+				format: 'date-time',
+				description: 'The date that the notification was created.'
+			},
+			type: {
+				type: 'string',
+				enum: ['follow', 'receiveFollowRequest', 'mention', 'reply', 'renote', 'quote', 'reaction', 'poll_vote'],
+				description: 'The type of the notification.'
+			},
+		},
+		required: ['id', 'createdAt', 'type']
+	},
+
 	DriveFile: {
 		type: 'object',
 		properties: {