diff --git a/index.js b/index.js
index 6b4ec5d..22c82be 100644
--- a/index.js
+++ b/index.js
@@ -7,12 +7,71 @@ import { blogsController } from "./lib/controllers/blogs.js";
 import { sourcesController } from "./lib/controllers/sources.js";
 import { apiController } from "./lib/controllers/api.js";
 import { startSync, stopSync } from "./lib/sync/scheduler.js";
+import { importBookmarkUrl } from "./lib/bookmark-import.js";
 
 const __dirname = path.dirname(fileURLToPath(import.meta.url));
 
 const protectedRouter = express.Router();
 const publicRouter = express.Router();
 
+// Global hook router: intercepts POST requests site-wide to detect micropub
+// bookmark creations and auto-import the bookmarked site into the blogroll.
+// Mounted at "/" via contentNegotiationRoutes (runs before auth middleware).
+//
+// NOTE: When the Microsub plugin is installed it acts as the single source of
+// truth for bookmarks — it creates the feed subscription AND notifies the
+// blogroll via notifyBlogroll(). This hook therefore skips processing if
+// Microsub is available, acting only as a standalone fallback.
+const bookmarkHookRouter = express.Router();
+bookmarkHookRouter.use((request, response, next) => {
+  response.on("finish", () => {
+    // Only act on successful POST creates (201 Created / 202 Accepted)
+    if (
+      request.method !== "POST" ||
+      (response.statusCode !== 201 && response.statusCode !== 202)
+    ) {
+      return;
+    }
+
+    // Ignore non-create actions (update, delete, undelete)
+    const action =
+      request.query?.action || request.body?.action || "create";
+    if (action !== "create") return;
+
+    // bookmark-of may be a top-level field (form-encoded / JF2 JSON)
+    // or nested inside properties (MF2 JSON format)
+    const bookmarkOf =
+      request.body?.["bookmark-of"] ||
+      request.body?.properties?.["bookmark-of"]?.[0];
+    if (!bookmarkOf) return;
+
+    const { application } = request.app.locals;
+
+    // Microsub plugin is installed → it will handle this bookmark and notify
+    // the blogroll. Skip direct import to avoid duplicate entries.
+    if (application.collections?.has("microsub_channels")) {
+      return;
+    }
+
+    // Extract category from any micropub body format:
+    //   form-encoded:  category=tech  or  category[]=tech&category[]=web
+    //   JF2 JSON:      { "category": ["tech", "web"] }
+    //   MF2 JSON:      { "properties": { "category": ["tech"] } }
+    const rawCategory =
+      request.body?.category ||
+      request.body?.properties?.category;
+    const category = Array.isArray(rawCategory)
+      ? rawCategory[0] || "bookmarks"
+      : rawCategory || "bookmarks";
+
+    importBookmarkUrl(application, bookmarkOf, category).catch((err) =>
+      console.warn("[Blogroll] bookmark-import failed:", err.message)
+    );
+  });
+
+  next();
+});
+
 const defaults = {
   mountPath: "/blogrollapi",
   syncInterval: 3600000, // 1 hour
@@ -54,6 +113,14 @@ export default class BlogrollEndpoint {
     };
   }
 
+  /**
+   * Global middleware (mounted at "/") — intercepts micropub bookmark creations.
+   * Uses res.on("finish") so it never interferes with the request lifecycle.
+   */
+  get contentNegotiationRoutes() {
+    return bookmarkHookRouter;
+  }
+
   /**
    * Protected routes (require authentication)
    * Admin dashboard and management
@@ -149,4 +216,4 @@ export default class BlogrollEndpoint {
   destroy() {
     stopSync();
   }
-}
+}
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diff --git a/lib/bookmark-import.js b/lib/bookmark-import.js
new file mode 100644
index 0000000..429d6cd
--- /dev/null
+++ b/lib/bookmark-import.js
@@ -0,0 +1,91 @@
+/**
+ * Bookmark → blogroll import
+ * Called when a micropub bookmark post is created.
+ * Discovers feeds for the bookmarked site's origin and adds them to the blogroll.
+ * @module lib/bookmark-import
+ */
+
+import { discoverFeeds } from "./utils/feed-discovery.js";
+import { upsertBlog } from "./storage/blogs.js";
+
+/**
+ * Import a bookmarked URL's site into the blogroll.
+ * Extracts the origin URL, discovers feeds, and upserts the first feed as a blog entry.
+ *
+ * @param {object} application - Indiekit application object
+ * @param {string} bookmarkUrl - The URL that was bookmarked (bookmark-of value)
+ * @param {string} [category="bookmarks"] - Category to assign in the blogroll
+ * @returns {Promise<object>} Result { added, alreadyExists, noFeeds, error }
+ */
+export async function importBookmarkUrl(application, bookmarkUrl, category = "bookmarks") {
+  // Normalise: bookmark-of may be an array in some micropub clients
+  const url = Array.isArray(bookmarkUrl) ? bookmarkUrl[0] : bookmarkUrl;
+
+  let siteUrl;
+  try {
+    siteUrl = new URL(url).origin;
+  } catch {
+    return { error: `Invalid bookmark URL: ${url}` };
+  }
+
+  // Guard: blogroll DB must be available
+  if (typeof application.getBlogrollDb !== "function") {
+    console.warn("[Blogroll] bookmark-import: getBlogrollDb not available");
+    return { error: "blogroll not initialised" };
+  }
+
+  const db = application.getBlogrollDb();
+
+  // Check if any active blog with this siteUrl is already in the blogroll
+  const existing = await db.collection("blogrollBlogs").findOne({
+    siteUrl,
+    status: { $ne: "deleted" },
+  });
+
+  if (existing) {
+    // If the category differs, update it (tag changed on the bookmark post)
+    if (existing.category !== category) {
+      await db.collection("blogrollBlogs").updateOne(
+        { _id: existing._id },
+        { $set: { category, updatedAt: new Date().toISOString() } },
+      );
+      console.log(
+        `[Blogroll] bookmark-import: updated category for "${existing.title}" → "${category}"`,
+      );
+      return { updated: true, siteUrl };
+    }
+    console.log(
+      `[Blogroll] bookmark-import: ${siteUrl} already in blogroll ("${existing.title}")`,
+    );
+    return { alreadyExists: true, siteUrl };
+  }
+
+  // Discover feeds from the origin
+  const discovery = await discoverFeeds(siteUrl);
+
+  if (!discovery.success || discovery.feeds.length === 0) {
+    console.log(`[Blogroll] bookmark-import: no feeds found for ${siteUrl}`);
+    return { noFeeds: true, siteUrl };
+  }
+
+  // Add the first discovered feed
+  const feed = discovery.feeds[0];
+  const result = await upsertBlog(application, {
+    title: discovery.pageTitle || siteUrl,
+    feedUrl: feed.url,
+    siteUrl,
+    feedType: feed.type || "rss",
+    category,
+    source: "bookmark",
+    sourceId: null,
+    status: "active",
+  });
+
+  if (result.upserted) {
+    console.log(
+      `[Blogroll] bookmark-import: added ${feed.url} ("${discovery.pageTitle || siteUrl}") → category "${category}"`
+    );
+  }
+
+  return { added: result.upserted ? 1 : 0, siteUrl };
+}
\ No newline at end of file