diff --git a/packages/misskey-js/src/schemas/ad.ts b/packages/misskey-js/src/schemas/ad.ts
new file mode 100644
index 0000000000..f198fc759a
--- /dev/null
+++ b/packages/misskey-js/src/schemas/ad.ts
@@ -0,0 +1,48 @@
+import type { JSONSchema7Definition } from 'schema-type';
+
+export const packedAdSchema = {
+	$id: 'https://misskey-hub.net/api/schemas/Ad',
+
+	type: 'object',
+	properties: {
+		id: { $ref: 'https://misskey-hub.net/api/schemas/Id' },
+		createdAt: {
+			type: 'string',
+			format: 'date-time',
+		},
+		expiresAt: {
+			type: 'string',
+			format: 'date-time',
+		},
+		startsAt: {
+			type: 'string',
+			format: 'date-time',
+		},
+        place: {
+            type: 'string',
+        },
+        property: {
+            type: 'string',
+        },
+        ratio: {
+            type: 'number',
+        },
+        imageUrl: {
+            type: ['string', 'null'],
+        },
+        memo: {
+            type: 'string',
+        },
+    },
+    required: [
+        'id',
+        'createdAt',
+        'expiresAt',
+        'startsAt',
+        'place',
+        'property',
+        'ratio',
+        'imageUrl',
+        'memo',
+    ],
+} as const satisfies JSONSchema7Definition;
diff --git a/packages/misskey-js/src/schemas/announcement.ts b/packages/misskey-js/src/schemas/announcement.ts
new file mode 100644
index 0000000000..eb8b945b5c
--- /dev/null
+++ b/packages/misskey-js/src/schemas/announcement.ts
@@ -0,0 +1,35 @@
+import type { JSONSchema7Definition } from 'schema-type';
+
+export const packedAnnouncementSchema = {
+	$id: 'https://misskey-hub.net/api/schemas/Announcement',
+
+	type: 'object',
+	properties: {
+		id: { $ref: 'https://misskey-hub.net/api/schemas/Id' },
+		createdAt: {
+			type: 'string',
+			format: 'date-time',
+		},
+		updatedAt: {
+			type: 'string',
+			format: 'date-time',
+		},
+        title: {
+            type: 'string',
+        },
+        text: {
+            type: 'string',
+        },
+        imageUrl: {
+            type: ['string', 'null'],
+        },
+    },
+    required: [
+        'id',
+        'createdAt',
+        'updatedAt',
+        'title',
+        'text',
+        'imageUrl',
+    ],
+} as const satisfies JSONSchema7Definition;