# Zoom API - Documentation API Calls not Working **URL:** \ **Category:** API and Webhooks\ **Created:** [November 2, 2020, 6:34am UTC](https://devforum.zoom.us/t/zoom-api-documentation-api-calls-not-working/34879 "2020-11-02T06:34:53Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![arjunkaranam](https://avatars.discourse-cdn.com/v4/letter/a/87869e/32.png) [@arjunkaranam](https://devforum.zoom.us/u/arjunkaranam)\ **Post date:** [November 2, 2020, 6:34am UTC](https://devforum.zoom.us/t/zoom-api-documentation-api-calls-not-working/34879/1 "2020-11-02T06:34:53Z")
**Description** Hi! I am currently trying to test out the Zoom APIs through the direct API calls in the documentation, but I am unable to successfully make the call. I am able to get the Authentication token, but whenever I try to make the API call itself, I get an error. **Error** Whenever I make the API Call, I get the following error: “The API did not return a response. Is it running and accessible? If you are sending this request from a web browser, does the API support cors?” I have attempted to make the call with the “Send requests directly from the browser (CORS must be enabled)” checkbox checked and unchecked. **Which App Type (OAuth / Chatbot / JWT / Webhook)?** OAuth **Which Endpoint/s?** List Users Endpoint ---
**Author:** ![DeveloperBot](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/developerbot/32/12632_2.png) [@DeveloperBot](https://devforum.zoom.us/u/DeveloperBot)\ **Post date:** [November 2, 2020, 6:35am UTC](https://devforum.zoom.us/t/zoom-api-documentation-api-calls-not-working/34879/2 "2020-11-02T06:35:40Z")
Hey @arjunkaranam Thanks for posting on the Zoom Devforum! I am still learning, but I will try my best to help answer your question. 🙂 Checkout this related thread that may have the answer you are looking for: > [@C# Zoom API calls](https://devforum.zoom.us/t/-/4758): > > New to Zoom, looking for sample code or directions to call out functionality via REST API C# was able to use Postman and do basic stuff like List users or get user through JWT, but not with OAUTH trying to do same with C#. I don’t see any support documentation on this. am i missing anything? thanks If this thread did not help, please let us know by replying back here and someone from the Developer Relations team will get back to you shortly. Thanks, DeveloperBot ---
**Author:** ![arjunkaranam](https://avatars.discourse-cdn.com/v4/letter/a/87869e/32.png) [@arjunkaranam](https://devforum.zoom.us/u/arjunkaranam)\ **Post date:** [November 2, 2020, 6:46am UTC](https://devforum.zoom.us/t/zoom-api-documentation-api-calls-not-working/34879/3 "2020-11-02T06:46:41Z")
Hi! I tried going through this post and the guide on how to use the Documentation API calls already and they still didn’t work ☹ ---
**Author:** ![tommy](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/tommy/32/72769_2.png) [@tommy](https://devforum.zoom.us/u/tommy)\ **Post date:** [November 2, 2020, 11:40pm UTC](https://devforum.zoom.us/t/zoom-api-documentation-api-calls-not-working/34879/4 "2020-11-02T23:40:06Z")
Hey @arjunkaranam, I just tried the [List Users](https://marketplace.zoom.us/docs/api-reference/zoom-api/users/users) API test request on our docs and it did work. Are you still seeing this issue? If so, can you share a screenshot of the error? Thanks, Tommy ---
**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:** [December 3, 2020, 9:40am UTC](https://devforum.zoom.us/t/zoom-api-documentation-api-calls-not-working/34879/5 "2020-12-03T09:40:08Z")
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