# 403 Errors posting to /closedcaption from Windows

**URL:** <https://devforum.zoom.us/t/403-errors-posting-to-closedcaption-from-windows/30510>\
**Category:** API and Webhooks\
**Created:** [September 17, 2020, 2:35am UTC](https://devforum.zoom.us/t/403-errors-posting-to-closedcaption-from-windows/30510 "2020-09-17T02:35:18Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![julie](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/julie/32/15454_2.png) [@julie](https://devforum.zoom.us/u/julie)\
**Post date:** [September 17, 2020, 2:35am UTC](https://devforum.zoom.us/t/403-errors-posting-to-closedcaption-from-windows/30510/1 "2020-09-17T02:35:18Z")

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**Description**  
I am integrating third-party closed captioning and my code works well from a Mac (albeit with the occasional delays many others have also reported) but when the same executable uses the URL from Windows, it returns a 403 error.

**Error**  
HTTP 403 status, no message

**Which Endpoint/s?**  
/closedcaption using the URL provided by clicking “Use a 3rd party CC service”

**How To Reproduce (If applicable)**  
Steps to reproduce the behavior:

1. POST to [https://wmcc.zoom.us/closedcaption?id=XXXX&ns=XXXX&expire=86400&sparams=id%2Cns%2Cexpire&signature=XXXX&seq=2&lang=en-US](https://wmcc.zoom.us/closedcaption?id=XXXX&ns=XXXX&expire=86400&sparams=id%2Cns%2Cexpire&signature=XXXX&seq=2&lang=en-US)
2. Status code 200 on mac, 403 on windows
3. I tried using the URL from the Mac client from Windows, but that had the same result.

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**Author:** ![will.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/will.zoom/32/14417_2.png) [@will.zoom](https://devforum.zoom.us/u/will.zoom)\
**Post date:** [September 18, 2020, 3:14pm UTC](https://devforum.zoom.us/t/403-errors-posting-to-closedcaption-from-windows/30510/2 "2020-09-18T15:14:47Z")

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Hey @julie,

Thank you for raising this with us—I’ve brought this to the attention of our team, and they’re looking into it. (ZOOM-198211).

Best,  
Will

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**Author:** ![system](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/3X/6/1/614bdd549b610bbaa46ff934617683a02bdaa03c.png) [@system](https://devforum.zoom.us/u/system)\
**Post date:** [October 19, 2020, 1:14am UTC](https://devforum.zoom.us/t/403-errors-posting-to-closedcaption-from-windows/30510/3 "2020-10-19T01:14:59Z")

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