diff --git a/README.md b/README.md
index f711c79..3b58f6b 100644
--- a/README.md
+++ b/README.md
@@ -6,5 +6,21 @@
 python3 -m venv venv
 . venv/bin/activate
 pip install -e .
-keyserver-bot --help
+keyserver-bot --email keyserver@example.org --password s3cr3t
 ```
+
+## Usage
+
+If you send an email address to the bot,
+it will try to query WKD,
+and if that fails keys.openpgp.org,
+for a public OpenPGP key belonging to the email address.
+
+Then it will send you a VCard file
+which contains the public key,
+so you can initiate an encrypted chat to it.
+
+With the "/generate-invite" command,
+you can also generate an invite link for the bot
+so you can publish it.
+
diff --git a/src/keyserver_bot/hooks.py b/src/keyserver_bot/hooks.py
index 37accfe..0e31b40 100644
--- a/src/keyserver_bot/hooks.py
+++ b/src/keyserver_bot/hooks.py
@@ -20,22 +20,22 @@ HELP_MSG = (
 def command(event):
     snapshot = event.message_snapshot
 
+    if snapshot.text == "/generate-invite":
+        return snapshot.chat.send_text(snapshot.account.get_qr_code())
     email = snapshot.text
     try:
         validate_email(email, check_deliverability=False)
     except EmailNotValidError:
-        snapshot.chat.send_text(HELP_MSG)
-        return
+        return snapshot.chat.send_text(HELP_MSG)
 
     public_key = request_key_by_email(email)
     if not public_key:
-        snapshot.chat.send_text("Sorry, I could not find a key for this user.")
-        return
+        return snapshot.chat.send_text("Sorry, I could not find a key for this user.")
 
     vcard = construct_vcard(email, public_key)
     vcard_path = f"/tmp/{email}.vcf"
     save_vcard(vcard_path, vcard)
-    snapshot.chat.send_file(vcard_path)
+    return snapshot.chat.send_file(vcard_path)
 
 
 def request_key_by_email(email) -> str:
@@ -64,7 +64,6 @@ def delete_data(msg):
 
 
 def main():
-    # TODO: print invite link
     run_bot_cli(hooks)