diff --git a/src/activitypub/index.js b/src/activitypub/index.js
index b3b68c5057..0c7fb0b777 100644
--- a/src/activitypub/index.js
+++ b/src/activitypub/index.js
@@ -237,10 +237,3 @@ ActivityPub.send = async (type, id, targets, payload) => {
 		}
 	}));
 };
-
-setTimeout(async () => {
-	await ActivityPub.send('uid', 1, 'https://localhost/category/1', {
-		type: 'Follow',
-		object: 'https://localhost/category/1',
-	});
-}, 2000);
diff --git a/src/activitypub/mocks.js b/src/activitypub/mocks.js
index 4074bc57f7..5626f84869 100644
--- a/src/activitypub/mocks.js
+++ b/src/activitypub/mocks.js
@@ -232,6 +232,7 @@ Mocks.note = async (post) => {
 		published,
 		url: id,
 		attributedTo: `${nconf.get('url')}/uid/${post.user.uid}`,
+		audience: `${nconf.get('url')}/topic/${post.topic.slug}`,
 		sensitive: false, // todo
 		summary: null,
 		name,
diff --git a/src/controllers/activitypub/actors.js b/src/controllers/activitypub/actors.js
index b14b46c380..2d7e1cb751 100644
--- a/src/controllers/activitypub/actors.js
+++ b/src/controllers/activitypub/actors.js
@@ -4,6 +4,7 @@ const nconf = require('nconf');
 
 const meta = require('../../meta');
 const posts = require('../../posts');
+const topics = require('../../topics');
 const categories = require('../../categories');
 const activitypub = require('../../activitypub');
 
@@ -58,6 +59,23 @@ Actors.note = async function (req, res, next) {
 	res.status(200).json(payload);
 };
 
+Actors.topic = async function (req, res, next) {
+	// When queried, a topic more or less returns the main pid's note representation
+	const { mainPid, slug } = await topics.getTopicFields(req.params.tid, ['mainPid', 'slug']);
+	const post = (await posts.getPostSummaryByPids([mainPid], req.uid, { stripTags: false })).pop();
+	if (!post) {
+		return next('route');
+	}
+
+	const payload = await activitypub.mocks.note(post);
+	payload.id = `${nconf.get('url')}/topic/${req.params.tid}`;
+	payload.type = 'Page';
+	payload.url = `${nconf.get('url')}/topic/${slug}`;
+	payload.audience = `${nconf.get('url')}/category/${post.category.slug}`;
+
+	res.status(200).json(payload);
+};
+
 Actors.category = async function (req, res, next) {
 	const exists = await categories.exists(req.params.cid);
 	if (!exists) {
diff --git a/src/routes/activitypub.js b/src/routes/activitypub.js
index 68747c1d1e..7c50b782ee 100644
--- a/src/routes/activitypub.js
+++ b/src/routes/activitypub.js
@@ -31,7 +31,9 @@ module.exports = function (app, middleware, controllers) {
 
 	app.get('/post/:pid', [...middlewares, middleware.assert.post], controllers.activitypub.actors.note);
 
-	app.get('/category/:cid', [...middlewares, middleware.assert.category], controllers.activitypub.actors.category);
+	app.get('/topic/:tid/:slug?', [...middlewares, middleware.assert.topic], controllers.activitypub.actors.topic);
+
+	app.get('/category/:cid/:slug?', [...middlewares, middleware.assert.category], controllers.activitypub.actors.category);
 	app.get('/category/:cid/inbox', [...middlewares, middleware.assert.category], controllers.activitypub.getInbox);
 	app.post('/category/:cid/inbox', [...middlewares, middleware.assert.category, middleware.activitypub.validate], controllers.activitypub.postInbox);
 	app.get('/category/:cid/outbox', [...middlewares, middleware.assert.category], controllers.activitypub.getCategoryOutbox);