diff --git a/index.html b/index.html
index 8f55bd4..a91b9b3 100644
--- a/index.html
+++ b/index.html
@@ -1942,10 +1942,24 @@
 
                 var CHAT_URL =
                     "https://002-001-5dd6e535-4d1c-46bc-9bd9-42ad4bc5f082.odoo4projects.com/webhook/702862fd-dd17-4a34-8efb-e9056d2c50df/chat";
-                var SESSION =
-                    "mbs_" +
-                    Math.random().toString(36).slice(2) +
-                    Date.now().toString(36);
+                /* Generate a UUID v4 for chatid */
+                var CHAT_ID = (function () {
+                    if (
+                        typeof crypto !== "undefined" &&
+                        typeof crypto.randomUUID === "function"
+                    ) {
+                        return crypto.randomUUID();
+                    }
+                    return "xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx".replace(
+                        /[xy]/g,
+                        function (c) {
+                            var r = (Math.random() * 16) | 0;
+                            return (c === "x" ? r : (r & 0x3) | 0x8).toString(
+                                16,
+                            );
+                        },
+                    );
+                })();
 
                 var panel = document.getElementById("chat-panel");
                 var chatLog = document.getElementById("chat-history");
@@ -2022,13 +2036,16 @@
                     var thinkEl = appendMsg("agent", "\u2026");
                     thinkEl.classList.add("chat-thinking");
 
-                    var fd = new FormData();
-                    fd.append("message", text);
-                    fd.append("session_id", SESSION);
-
                     fetch(CHAT_URL, {
                         method: "POST",
-                        body: fd,
+                        headers: { "Content-Type": "application/json" },
+                        body: JSON.stringify([
+                            {
+                                action: "sendMessage",
+                                chatid: CHAT_ID,
+                                chatInput: text,
+                            },
+                        ]),
                     })
                         .then(function (r) {
                             var ct = r.headers.get("content-type") || "";
@@ -2040,12 +2057,14 @@
                         .then(function (d) {
                             if (thinkEl.parentNode)
                                 chatLog.removeChild(thinkEl);
+                            /* n8n returns an array or object — unwrap either */
+                            var item = Array.isArray(d) ? d[0] : d;
                             var reply =
-                                d.reply ||
-                                d.message ||
-                                d.response ||
-                                d.output ||
-                                d.text ||
+                                (item &&
+                                    (item.output ||
+                                        item.text ||
+                                        item.message ||
+                                        item.reply)) ||
                                 (typeof d === "string" ? d : JSON.stringify(d));
                             appendMsg("agent", reply);
                             busy = false;