diff --git a/src/api/routes/channels/#channel_id/index.ts b/src/api/routes/channels/#channel_id/index.ts
index e8c6ecfbe..a73e795a7 100644
--- a/src/api/routes/channels/#channel_id/index.ts
+++ b/src/api/routes/channels/#channel_id/index.ts
@@ -150,6 +150,7 @@ router.patch(
         const { channel_id } = req.params as { [key: string]: string };
         const channel = await Channel.findOneOrFail({
             where: { id: channel_id },
+            relations: payload.available_tags ? ["available_tags"] : [],
         });
 
         if (channel.isThread()) {
@@ -164,6 +165,16 @@ router.patch(
             req.permission!.hasThrow("MANAGE_CHANNELS");
         }
 
+        if (payload.available_tags) {
+            if (channel.isForum() && channel.available_tags) {
+                //TODO maybe error if this fails, and maybe handle creating tags?
+                const filter = new Set(payload.available_tags.map(({ id }) => id));
+                const tags = channel.available_tags.filter((_) => !filter.has(_.id));
+                tags.forEach((_) => _.remove());
+                channel.available_tags = channel.available_tags.filter((_) => filter.has(_.id));
+            }
+        }
+
         if (payload.icon) payload.icon = await handleFile(`/channel-icons/${channel_id}`, payload.icon);
 
         channel.assign(payload);
diff --git a/src/api/routes/channels/#channel_id/tags.ts b/src/api/routes/channels/#channel_id/tags.ts
index c600752dd..d6c07e543 100644
--- a/src/api/routes/channels/#channel_id/tags.ts
+++ b/src/api/routes/channels/#channel_id/tags.ts
@@ -66,4 +66,41 @@ router.post(
     },
 );
 
+router.delete(
+    "/:tag_id",
+    route({
+        permission: "MANAGE_CHANNELS",
+        responses: {
+            201: {},
+            404: {},
+        },
+    }),
+    async (req: Request, res: Response) => {
+        const { channel_id, tag_id } = req.params as Record<string, string>;
+
+        const channel = await Channel.findOneOrFail({
+            where: { id: channel_id },
+            relations: ["available_tags"],
+        });
+
+        if (!channel.isForum()) throw new Error("is not thread only channel");
+
+        const tag = await Tag.findOneByOrFail({
+            id: tag_id,
+        });
+        channel.available_tags = channel.available_tags?.filter((t) => t.id !== tag.id);
+
+        await Promise.all([
+            tag.remove(),
+            emitEvent({
+                event: "CHANNEL_UPDATE",
+                data: channel.toJSON(),
+                channel_id,
+            } as ChannelUpdateEvent),
+        ]);
+
+        res.json(channel.toJSON());
+    },
+);
+
 export default router;