I’m trying to build a custom chat UI for a client who wants to strip out the heavy Genesys widget. The plan is to use the Guest API directly to handle the WebSocket connection for real-time messaging. I’ve got the OAuth flow working fine using client credentials, and I can successfully POST to /api/v2/external/messaging/messages to start a conversation. The response gives me a valid conversationId and guestId.
The issue hits when I try to open the WebSocket. The docs say I need to use the guestToken from the initial POST response to establish the connection at wss://api.mypurecloud.com/api/v2/external/messaging/websockets. I’m constructing the URL like this:
const wsUrl = `wss://api.mypurecloud.com/api/v2/external/messaging/websockets?guestToken=${guestToken}&conversationId=${conversationId}`;
const socket = new WebSocket(wsUrl);
When the socket opens, I immediately get a 403 Forbidden error in the console. The connection closes right after. I’ve double-checked the token-it’s definitely valid because I can still send HTTP messages with it. I even tried passing the Authorization: Bearer <access_token> header in the WebSocket request, but the browser API doesn’t support custom headers on WebSocket connections anyway.
Is there a specific claim or scope I’m missing in the token? Or maybe I need to use a different endpoint for the WebSocket handshake? I’ve been staring at the API docs for an hour and it just says “connect to the websocket url”.
Here’s the error payload I get from the server before it drops the connection:
{"message":"Access denied","error_code":"forbidden"}
I’ve tried refreshing the token and generating a new guest token, same result. Am I missing a step in the initialization?