# Runtime Error 400:Host can not register

**URL:** <https://devforum.zoom.us/t/runtime-error-400-host-can-not-register/18846>\
**Category:** API and Webhooks\
**Created:** [May 23, 2020, 4:18pm UTC](https://devforum.zoom.us/t/runtime-error-400-host-can-not-register/18846 "2020-05-23T16:18:32Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![ruthnis](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/ruthnis/32/9090_2.png) [@ruthnis](https://devforum.zoom.us/u/ruthnis)\
**Post date:** [May 23, 2020, 4:18pm UTC](https://devforum.zoom.us/t/runtime-error-400-host-can-not-register/18846/1 "2020-05-23T16:18:32Z")

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**Description**  
API that used to work for a meeting is not working and it is giving this error

**Error**  
400: Host can not register

**Which App Type (OAuth / Chatbot / JWT / Webhook)?**  
I tried it with JWY authorization and also using a Webhook and integromat

**Which Endpoint/s?**  
The url to which I am sending the request : [https://api.zoom.us/v2/webinars/".$webinarid."/registrants](https://api.zoom.us/v2/webinars/%22.%24webinarid.%22/registrants)

The data sent  
$zoomPost = array(  
“first\_name” =\> $firstname,  
“last\_name” =\> $lastname."-".$ref,  
“email” =\> $Email,  
“industry” =\> $ref  
);

**Screenshots (If applicable)**  
Error in the integromat screen

 ![zoomintegromat](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/2X/9/982bdbc1d254e423102776dc2f557deba89d40d8.jpeg)

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**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:** [May 28, 2020, 8:51pm UTC](https://devforum.zoom.us/t/runtime-error-400-host-can-not-register/18846/2 "2020-05-28T20:51:10Z")

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Hey @ruthnis,

It seems as if you are trying to register the host of the meeting. The host cannot register for the meeting since they are the meeting host.

Thanks,  
Tommy

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**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:** [August 21, 2020, 9:35pm UTC](https://devforum.zoom.us/t/runtime-error-400-host-can-not-register/18846/3 "2020-08-21T21:35:36Z")

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Closed on August 21, 2020, 9:35pm UTC