# Zoom Video SDK Web - /wc/ping/ Endpoint Returning 404 Errors **URL:** \ **Category:** Video SDK\ **Tags:** video-sdk, sdk\ **Created:** [March 21, 2025, 8:35pm UTC](https://devforum.zoom.us/t/zoom-video-sdk-web-wc-ping-endpoint-returning-404-errors/130327 "2025-03-21T20:35:01Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![freelancer.nak](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/freelancer.nak/32/40968_2.png) [@freelancer.nak](https://devforum.zoom.us/u/freelancer.nak)\ **Post date:** [March 21, 2025, 8:35pm UTC](https://devforum.zoom.us/t/zoom-video-sdk-web-wc-ping-endpoint-returning-404-errors/130327/1 "2025-03-21T20:35:01Z")
@vic.yang #### **Issue:** We are integrating **Zoom Video SDK for Web** and are seeing repeated 404 (Not Found) errors in the browser console when the following request is made: ![Screenshot 2025-03-22 at 1.31.04 AM](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/3X/8/c/8c1b522ef371854bd9d987c1750713540718b072.png) ```auto https://rwciad3.iad.zoom.us/wc/ping/{session_id}?ts={timestamp}&auth={auth_token}&rwcToken={rwc_token}&dmz=1 ``` This issue disrupts the session and prevents normal SDK functionality. #### **Context:** - Using **Zoom Video SDK (Web)**. - The issue occurs during a session, likely related to connectivity checks. - Happens intermittently but affects overall session stability. #### **Questions:** 1. What is the purpose of `/wc/ping/` in Zoom Video SDK? 2. Why would this request return a 404 error? 3. Is this a known issue, or is there a configuration step we are missing? 4. Are there specific settings needed to resolve this? Would appreciate any insights from the Zoom dev team! ---
**Author:** ![vic.yang](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/vic.yang/32/24656_2.png) [@vic.yang](https://devforum.zoom.us/u/vic.yang)\ **Post date:** [March 22, 2025, 1:41pm UTC](https://devforum.zoom.us/t/zoom-video-sdk-web-wc-ping-endpoint-returning-404-errors/130327/2 "2025-03-22T13:41:04Z")
Hey @freelancer.nak Thanks for your feedback. > 1. What is the purpose of `/wc/ping/` in Zoom [Video SDK](https://developers.zoom.us/docs/video-sdk)? We ping servers in clusters within nearby regions and select the one with the fastest response to ensure the best communication quality. > 1. Why would this request return a 404 error? > 2. Is this a known issue, or is there a configuration step we are missing? It could be due to deployment timing, making the service temporarily unavailable, or a configuration error. We need to investigate further. > 1. Are there specific settings needed to resolve this? There shouldn’t be any additional configuration needed. We have backup servers deployed in each region, and even if the current region goes down, traffic will automatically route to the nearest available cluster. If possible, could you provide the session ID so we can investigate? Thanks Vic ---
**Author:** ![SDK\_client](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/sdk_client/32/68247_2.png) [@SDK\_client](https://devforum.zoom.us/u/SDK_client)\ **Post date:** [March 28, 2025, 10:36am UTC](https://devforum.zoom.us/t/zoom-video-sdk-web-wc-ping-endpoint-returning-404-errors/130327/3 "2025-03-28T10:36:20Z")
Hi Vic. We’re having the same issues and it’s really impacting our clients joining & staying on calls. Can we also provide info to add to the investigation currently in progress? Any updates would be appreciated. ---
**Author:** ![freelancer.nak](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/freelancer.nak/32/40968_2.png) [@freelancer.nak](https://devforum.zoom.us/u/freelancer.nak)\ **Post date:** [March 28, 2025, 11:41am UTC](https://devforum.zoom.us/t/zoom-video-sdk-web-wc-ping-endpoint-returning-404-errors/130327/4 "2025-03-28T11:41:13Z")
**@vic.yang** We are encountering two issues while integrating the Zoom Video SDK for Web: * * * **1.** We consistently see repeated `404 (Not Found)` errors in the browser console for the following request: ```auto https://rwciad3.iad.zoom.us/wc/ping/{session_id}?ts={timestamp}&auth={auth_token}&rwcToken={rwc_token}&dmz=1 ``` 📸 **Screenshot 1:** (Already attached in the initial post) * * * **2.** We are **unable to join sessions on a specific 4G network** , while the same setup works fine on other networks. It seems the `/wc/ping/` error could be related, but we are unsure if it’s the root cause. 📸 **Screenshot 2:** ![WhatsApp Image 2025-03-28 at 15.43.35](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/3X/2/9/291435eb93ae6fb62d86edec732ee490a6e7754b.jpeg) * * * Both issues significantly impact session stability and functionality. **Questions:** 1. What is the purpose of `/wc/ping/` in the Zoom Video SDK? 2. Why would this request return a `404` error? 3. Could this be related to network restrictions or configurations on the 4G network? 4. Is this a known issue, or is there a configuration step we might be missing? 5. Are there any specific settings or adjustments required to resolve this? **Additional Context:** Here are the details requested by Zoom Support, including the session token: - **Request URL:** `https://rwciad3.iad.zoom.us/wc/ping/93237887788?ts=1743158548865&auth=QCQ9vmT8hK1VLVT3-ZOZfNv6t6o15sgCz8obv3PPsqg&rwcToken=qMYeHBMTiVTBNissTIkVod3dWrBbruvEyZyGlWe9UTI&dmz=1` - **JWT Token:** ```auto eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCIsImN0eSI6IkpXVCJ9.eyJhcHBfa2V5IjoibjFoSmVFcVRxbnZTMDNNNXdnOFJ0TG1jYXRBZUNvbUdVRm9UIiwicm9sZV90eXBlIjoxLCJ0cGMiOiIyNjIzNCIsInZlcnNpb24iOjEsImlhdCI6MTc0MzE1OTk5OCwiZXhwIjoxNzQzMTY3MTk4LCJjbG91ZF9yZWNvcmRpbmdfb3B0aW9uIjowLCJjbG91ZF9yZWNvcmRpbmdfZWxlY3Rpb24iOjEsImF1ZGlvX2NvbXBhdGlibGVfbW9kZSI6MX0.5ir1lOkIwnx1fxwF7OenZxi8VHG_8ZHqjLOVBC0bEE0 ``` The above URL and token are related to the **same session** where both issues are occurring. We would greatly appreciate any insights or guidance from the Zoom dev team on how to address these issues. Thank you! Thank you!