Having some config trouble here for reconnecting to the Genesys Cloud Notification API WebSocket in Node.js.
I am using ws v8.16.0 on node v20.11.0. The connection establishes successfully with OAuth2 Bearer token, but after the server sends a close frame 1001 (Going Away) due to idle timeout, my reconnection attempt fails with a 403 Forbidden.
const ws = new WebSocket('wss://api.mypurecloud.com/api/v2/analytics/events', {
headers: { 'Authorization': `Bearer ${token}` }
});
ws.on('close', (code, reason) => {
if (code === 1001) {
console.log('Reconnecting...');
// Token refreshed here
new WebSocket('wss://api.mypurecloud.com/api/v2/analytics/events', {
headers: { 'Authorization': `Bearer ${newToken}` }
});
}
});
The initial connection works. The 403 occurs immediately on the second handshake. I am not seeing any rate limit headers in the initial response. Is the WebSocket session tied to a specific client ID that invalidates upon close, requiring a full OAuth refresh rather than just a token swap? Or is there a specific header missing for re-establishment?
Check your OAuth token refresh logic. The 403 Forbidden error usually indicates that the Bearer token attached to the reconnection attempt is expired or invalid, not that the WebSocket endpoint itself is blocked. Genesys Cloud Notification API connections drop after ~60 seconds of inactivity (close code 1001). When you reconnect, you must fetch a fresh access token via the /oauth/token endpoint before initializing the new WebSocket instance. Reusing the old token fails because it has likely rotated or expired during the idle period.
Here is the corrected flow structure:
ws.on('close', async (code, reason) => {
if (code === 1001) {
// Fetch fresh token
const newToken = await fetchAccessToken();
// Reconnect with new headers
connectWebSocket(newToken);
}
});
Ensure your credential rotation happens before the handshake. See the reference guide here: https://developer.mypurecloud.com/api/rest/v2/notifications/
This is a standard token lifecycle issue masked as a WebSocket instability problem. The suggestion above is correct: you cannot reuse the initial Bearer token after a disconnect. Genesys Cloud invalidates these tokens rapidly, and the 403 confirms the server rejected the stale credential. You need to implement a robust refresh mechanism that triggers immediately upon the close event, specifically checking for code 1001 or 1006.
Here is a k6-compatible pattern for handling this in Node.js during load simulation. It ensures a fresh token is fetched before every reconnection attempt, preventing the 403 cascade.
const fetchToken = async () => {
const res = await fetch('https://api.mypurecloud.com/oauth/token', {
method: 'POST',
headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
body: `grant_type=client_credentials&client_id=${CLIENT_ID}&client_secret=${CLIENT_SECRET}`
});
return (await res.json()).access_token;
};
ws.on('close', async (code) => {
if (code === 1001 || code === 1006) {
const newToken = await fetchToken();
connect(newToken); // Reconnect with fresh auth
}
});
Always validate the OAuth scope includes analytics:events:read. Missing this scope also triggers 403s during reconnect.