diff --git a/signal_webhook/app.py b/signal_webhook/app.py
index 2a80037..c9fd06e 100644
--- a/signal_webhook/app.py
+++ b/signal_webhook/app.py
@@ -53,3 +53,24 @@ def alertmanager(recipient=None):
     signal.signal_send(recipient_nums, msg)
 
     return "OK", 200
+
+
+@app.route("/plain", methods=["POST"])
+def plain():
+    """Send a message through Signal, plain POST args.
+
+    Expects:
+    * message: plaintext message to be sent;
+    * recipient: ID of recipient. If absent, default recipient is used.
+    """
+
+    if "message" not in request.form:
+        return "Missing message", 400
+    recipient = request.form.get("recipient", configuration.DEFAULT_RECIPIENT)
+    try:
+        recipient_num = configuration.RECIPIENTS[recipient]
+    except KeyError:
+        return "Unauthorized recipient", 400
+
+    signal.signal_send([recipient_num], request.form["message"])
+    return "OK", 200