diff --git a/public/_headers b/public/_headers
index 2a5f7428..91574bd4 100644
--- a/public/_headers
+++ b/public/_headers
@@ -3,3 +3,6 @@
 
 /api/activitypub/actor
   Content-Type: application/activity+json
+
+/api/activitypub/note/*
+  Content-Type: application/activity+json
diff --git a/src/pages/api/activitypub/note/[id].ts b/src/pages/api/activitypub/note/[id].ts
new file mode 100644
index 00000000..11c3d2d6
--- /dev/null
+++ b/src/pages/api/activitypub/note/[id].ts
@@ -0,0 +1,33 @@
+import getAllPosts from '@utils/getAllPosts';
+import type { APIRoute } from 'astro';
+
+export const getStaticPaths = async () => {
+  const posts = await getAllPosts();
+  return posts.map((post) => ({ params: { id: post.url!.substring(7).replaceAll('/', '_') } }));
+};
+
+export const GET: APIRoute = async ({ params }) => {
+  const allPosts = await getAllPosts();
+  const post = allPosts.find((item) => item.url === `/posts/${params.id!.replaceAll('_', '/')}`)!;
+
+  return new Response(
+    JSON.stringify({
+      '@context': [
+        'https://www.w3.org/ns/activitystreams',
+        {
+          HashTag: 'as:HashTag',
+        },
+      ],
+      id: `https://blog.yunyi.beiyan.us/api/activitypub/note/${post.url}`,
+      type: 'Note',
+      attributedTo: 'https://blog.yunyi.beiyan.us/api/activitypub/actor',
+      cc: ['https://blog.yunyi.beiyan.us/api/activitypub/followers'],
+      content: `<p>发布了新的博文：<a href="https://blog.yunyi.beiyan.us${post.url}">${
+        post.frontmatter.title
+      }</a><br>${post.frontmatter.description || ''}</p>`,
+      published: new Date(post.frontmatter.date).toISOString(),
+      to: ['https://www.w3.org/ns/activitystreams#Public'],
+      url: `https://blog.yunyi.beiyan.us${post.url}`,
+    }),
+  );
+};