diff --git a/src/components/config/AttributesEditor.tsx b/src/components/config/AttributesEditor.tsx
new file mode 100644
index 0000000..bfead72
--- /dev/null
+++ b/src/components/config/AttributesEditor.tsx
@@ -0,0 +1,93 @@
+import React from 'react';
+import { ConnectionState } from 'livekit-client';
+import { AttributeItem } from '@/lib/types';
+
+
+interface AttributesEditorProps {
+  attributes: AttributeItem[];
+  onAttributesChange: (attributes: AttributeItem[]) => void;
+  themeColor: string;
+  disabled?: boolean;
+  connectionState?: ConnectionState;
+}
+
+export const AttributesEditor: React.FC<AttributesEditorProps> = ({
+  attributes,
+  onAttributesChange,
+  themeColor,
+  disabled = false,
+  connectionState
+}) => {
+  const handleKeyChange = (id: string, newKey: string) => {
+    const updatedAttributes = attributes.map(attr => 
+      attr.id === id ? { ...attr, key: newKey } : attr
+    );
+    onAttributesChange(updatedAttributes);
+  };
+
+  const handleValueChange = (id: string, newValue: string) => {
+    const updatedAttributes = attributes.map(attr => 
+      attr.id === id ? { ...attr, value: newValue } : attr
+    );
+    onAttributesChange(updatedAttributes);
+  };
+
+  const handleRemoveAttribute = (id: string) => {
+    const updatedAttributes = attributes.filter(attr => attr.id !== id);
+    onAttributesChange(updatedAttributes);
+  };
+
+  const handleAddAttribute = () => {
+    const newId = `attr_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`;
+    const updatedAttributes = [...attributes, { id: newId, key: "", value: "" }];
+    onAttributesChange(updatedAttributes);
+  };
+
+  return (
+    <div className="border border-gray-800 rounded-sm p-3 bg-gray-900/30">
+      {attributes.map((attribute) => (
+        <div key={attribute.id} className="flex items-center gap-2 mb-2">
+          <input
+            value={attribute.key}
+            onChange={(e) => handleKeyChange(attribute.id, e.target.value)}
+            className="flex-1 min-w-0 text-white text-sm bg-transparent border border-gray-800 rounded-sm px-3 py-1"
+            placeholder="Key"
+            disabled={disabled}
+          />
+          <input
+            value={attribute.value}
+            onChange={(e) => handleValueChange(attribute.id, e.target.value)}
+            className="flex-1 min-w-0 text-white text-sm bg-transparent border border-gray-800 rounded-sm px-3 py-1"
+            placeholder="Value"
+            disabled={disabled}
+          />
+          <button
+            onClick={() => handleRemoveAttribute(attribute.id)}
+            className="flex-shrink-0 w-6 h-6 flex items-center justify-center text-gray-400 hover:text-white"
+            disabled={disabled}
+            style={{ display: disabled ? 'none' : 'flex' }}
+          >
+            <svg xmlns="http://www.w3.org/2000/svg" className="h-4 w-4" fill="none" viewBox="0 0 24 24" stroke="currentColor">
+              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M6 18L18 6M6 6l12 12" />
+            </svg>
+          </button>
+        </div>
+      ))}
+      
+      <button
+        onClick={handleAddAttribute}
+        className={`text-xs py-1 px-2 rounded-sm flex items-center gap-1 ${
+          disabled
+            ? "bg-gray-700 text-gray-500 cursor-not-allowed" 
+            : `bg-${themeColor}-500 hover:bg-${themeColor}-600 text-white`
+        }`}
+        disabled={disabled}
+      >
+        <svg xmlns="http://www.w3.org/2000/svg" className="h-3 w-3" fill="none" viewBox="0 0 24 24" stroke="currentColor">
+          <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 4v16m8-8H4" />
+        </svg>
+        Add Attribute
+      </button>
+    </div>
+  );
+};
\ No newline at end of file
diff --git a/src/components/playground/Playground.tsx b/src/components/playground/Playground.tsx
index ec1db3d..fec3894 100644
--- a/src/components/playground/Playground.tsx
+++ b/src/components/playground/Playground.tsx
@@ -30,6 +30,7 @@ import { QRCodeSVG } from "qrcode.react";
 import { ReactNode, useCallback, useEffect, useMemo, useState } from "react";
 import tailwindTheme from "../../lib/tailwindTheme.preval";
 import { EditableNameValueRow } from "@/components/config/NameValueRow";
+import { AttributesEditor } from "@/components/config/AttributesEditor";
 
 export interface PlaygroundMeta {
   name: string;
@@ -260,9 +261,23 @@ export default function Playground({
               editable={roomState !== ConnectionState.Connected}
             />
             <EditableNameValueRow
-              name="Participant"
+              name="Participant ID"
               value={roomState === ConnectionState.Connected ? 
                 (localParticipant?.identity || '') : 
+                (config.settings.participant_id || '')}
+              valueColor={`${config.settings.theme_color}-500`}
+              onValueChange={(value) => {
+                const newSettings = { ...config.settings };
+                newSettings.participant_id = value;
+                setUserSettings(newSettings);
+              }}
+              placeholder="Enter participant id"
+              editable={roomState !== ConnectionState.Connected}
+            />
+            <EditableNameValueRow
+              name="Participant Name"
+              value={roomState === ConnectionState.Connected ? 
+                (localParticipant?.name || '') : 
                 (config.settings.participant_name || '')}
               valueColor={`${config.settings.theme_color}-500`}
               onValueChange={(value) => {
@@ -270,10 +285,39 @@ export default function Playground({
                 newSettings.participant_name = value;
                 setUserSettings(newSettings);
               }}
-              placeholder="Enter participant id"
+              placeholder="Enter participant name"
               editable={roomState !== ConnectionState.Connected}
             />
           </div>
+          
+          <div className="flex flex-col gap-2 mt-4">
+            <div className="text-xs text-gray-500 mt-2">Metadata</div>
+            <textarea
+              value={config.settings.metadata || ""}
+              onChange={(e) => {
+                const newSettings = { ...config.settings };
+                newSettings.metadata = e.target.value;
+                setUserSettings(newSettings);
+              }}
+              className="w-full text-white text-sm bg-transparent border border-gray-800 rounded-sm px-3 py-2"
+              placeholder="Custom metadata..."
+              rows={2}
+              disabled={roomState === ConnectionState.Connected}
+            />
+            
+            <div className="text-xs text-gray-500 mt-2">Attributes</div>
+            <AttributesEditor
+              attributes={config.settings.attributes || []}
+              onAttributesChange={(newAttributes) => {
+                const newSettings = { ...config.settings };
+                newSettings.attributes = newAttributes;
+                setUserSettings(newSettings);
+              }}
+              themeColor={config.settings.theme_color}
+              disabled={roomState === ConnectionState.Connected}
+            />
+          </div>
+
           <div className="flex flex-col gap-2 mt-4">
             <div className="text-xs text-gray-500 mt-2">RPC Method</div>
             <input
diff --git a/src/hooks/useConfig.tsx b/src/hooks/useConfig.tsx
index 16dd556..eb47ce2 100644
--- a/src/hooks/useConfig.tsx
+++ b/src/hooks/useConfig.tsx
@@ -1,5 +1,6 @@
 "use client";
 
+import { AttributeItem } from "@/lib/types";
 import { getCookie, setCookie } from "cookies-next";
 import jsYaml from "js-yaml";
 import { useRouter } from "next/navigation";
@@ -36,7 +37,10 @@ export type UserSettings = {
   ws_url: string;
   token: string;
   room_name: string;
+  participant_id: string;
   participant_name: string;
+  metadata?: string;
+  attributes?: AttributeItem[];
 };
 
 // Fallback if NEXT_PUBLIC_APP_CONFIG is not set
@@ -60,7 +64,10 @@ const defaultConfig: AppConfig = {
     ws_url: "",
     token: "",
     room_name: "",
+    participant_id: "",
     participant_name: "",
+    metadata: "",
+    attributes: [],
   },
   show_qr: false,
 };
@@ -130,6 +137,7 @@ export const ConfigProvider = ({ children }: { children: React.ReactNode }) => {
       ws_url: "",
       token: "",
       room_name: "",
+      participant_id: "",
       participant_name: "",
     } as UserSettings;
   }, [appConfig]);
diff --git a/src/hooks/useConnection.tsx b/src/hooks/useConnection.tsx
index bde8634..c90dc4a 100644
--- a/src/hooks/useConnection.tsx
+++ b/src/hooks/useConnection.tsx
@@ -54,14 +54,36 @@ export const ConnectionProvider = ({
           throw new Error("NEXT_PUBLIC_LIVEKIT_URL is not set");
         }
         url = process.env.NEXT_PUBLIC_LIVEKIT_URL;
-        const params = new URLSearchParams();
+        const body: Record<string, any> = {};
         if (config.settings.room_name) {
-          params.append('roomName', config.settings.room_name);
+          body.roomName = config.settings.room_name;
+        }
+        if (config.settings.participant_id) {
+          body.participantId = config.settings.participant_id;
         }
         if (config.settings.participant_name) {
-          params.append('participantName', config.settings.participant_name);
+          body.participantName = config.settings.participant_name;
         }
-        const { accessToken } = await fetch(`/api/token?${params}`).then((res) =>
+        if (config.settings.metadata) {
+          body.metadata = config.settings.metadata;
+        }
+        const attributesArray = Array.isArray(config.settings.attributes) ? config.settings.attributes : [];
+        if (attributesArray?.length) {
+          const attributes = attributesArray.reduce((acc, attr) => {
+            if (attr.key){
+              acc[attr.key] = attr.value;
+            }
+            return acc;
+          }, {} as Record<string, string>);
+          body.attributes = attributes;
+        }
+        const { accessToken } = await fetch(`/api/token`, {
+          method: "POST",
+          headers: {
+            "Content-Type": "application/json",
+          },
+          body: JSON.stringify(body),
+        }).then((res) =>
           res.json()
         );
         token = accessToken;
@@ -76,7 +98,9 @@ export const ConnectionProvider = ({
       config.settings.token,
       config.settings.ws_url,
       config.settings.room_name,
-      config.settings.participant_name,
+      config.settings.participant_id,
+      config.settings.metadata,
+      config.settings.attributes,
       generateToken,
       setToastMessage,
     ]
diff --git a/src/lib/types.ts b/src/lib/types.ts
index 8fb976f..ad57992 100644
--- a/src/lib/types.ts
+++ b/src/lib/types.ts
@@ -13,4 +13,10 @@ export interface SessionProps {
 export interface TokenResult {
   identity: string;
   accessToken: string;
+}
+
+export interface AttributeItem {
+  id: string;
+  key: string;
+  value: string;
 }
\ No newline at end of file
diff --git a/src/pages/api/token.ts b/src/pages/api/token.ts
index 8b7fb9b..d69a3f5 100644
--- a/src/pages/api/token.ts
+++ b/src/pages/api/token.ts
@@ -19,20 +19,38 @@ export default async function handleToken(
   res: NextApiResponse
 ) {
   try {
+    if (req.method !== "POST") {
+      res.setHeader("Allow", "POST");
+      res.status(405).end("Method Not Allowed");
+      return;
+    }
     if (!apiKey || !apiSecret) {
       res.statusMessage = "Environment variables aren't set up correctly";
       res.status(500).end();
       return;
     }
 
+    const {
+      roomName: roomNameFromBody,
+      participantName,
+      participantId: participantIdFromBody,
+      metadata: metadataFromBody,
+      attributes: attributesFromBody,
+    } = req.body;
+
     // Get room name from query params or generate random one
-    const roomName = req.query.roomName as string || 
+    const roomName = roomNameFromBody as string ||
       `room-${generateRandomAlphanumeric(4)}-${generateRandomAlphanumeric(4)}`;
-    
+
     // Get participant name from query params or generate random one
-    const identity = req.query.participantName as string || 
+    const identity = participantIdFromBody as string ||
       `identity-${generateRandomAlphanumeric(4)}`;
 
+    // Get metadata and attributes from query params
+    const metadata = metadataFromBody as string | undefined;
+    const attributesStr = attributesFromBody as string | undefined;
+    const attributes = attributesStr || {};
+
     const grant: VideoGrant = {
       room: roomName,
       roomJoin: true,
@@ -41,7 +59,7 @@ export default async function handleToken(
       canSubscribe: true,
     };
 
-    const token = await createToken({ identity }, grant);
+    const token = await createToken({ identity, metadata, attributes, name: participantName }, grant);
     const result: TokenResult = {
       identity,
       accessToken: token,