# Add Webinar Registrant runs into Status 415 / Error Code 300

**URL:** <https://devforum.zoom.us/t/add-webinar-registrant-runs-into-status-415-error-code-300/43032>\
**Category:** API and Webhooks\
**Created:** [February 10, 2021, 2:33pm UTC](https://devforum.zoom.us/t/add-webinar-registrant-runs-into-status-415-error-code-300/43032 "2021-02-10T14:33:06Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![reiner.velte](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/reiner.velte/32/22860_2.png) [@reiner.velte](https://devforum.zoom.us/u/reiner.velte)\
**Post date:** [February 10, 2021, 2:33pm UTC](https://devforum.zoom.us/t/add-webinar-registrant-runs-into-status-415-error-code-300/43032/1 "2021-02-10T14:33:06Z")

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**Description**  
How can I avoid to run into the above issue?

**Error**  
Status 415 Unsupported Media Type  
Error Code 300 Message Unsupported Content Type

**Which App Type (OAuth / Chatbot / JWT / Webhook)?**  
JWT.

**Which Endpoint/s?**  
webinars/86314147907/registrants

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

- Using Postman Zoom API
- Headers: Content-Type=multipart/form-data
- Body: email={my email address}, first\_name={my first name}
- Response: `300`Unsupported Content Type

**Screenshots (If applicable)**

**Additional context**

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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:** [February 11, 2021, 12:58pm UTC](https://devforum.zoom.us/t/add-webinar-registrant-runs-into-status-415-error-code-300/43032/2 "2021-02-11T12:58:11Z")

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Hi @reiner.velte,

Thanks for reaching out about this, and happy to help.

In order to debug, can you please share the full request body you’re using? In the meantime, please make sure you’re setting the Content-Type to application/json.

Thanks,  
Will

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**Author:** ![reiner.velte](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/reiner.velte/32/22860_2.png) [@reiner.velte](https://devforum.zoom.us/u/reiner.velte)\
**Post date:** [February 11, 2021, 4:18pm UTC](https://devforum.zoom.us/t/add-webinar-registrant-runs-into-status-415-error-code-300/43032/3 "2021-02-11T16:18:48Z")

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Hi Will,  
Thanks for your quick reply.  
Meanwhile I found out that the Postman collection “Zoom API” was causing the problem: they set the wrong content-type in their call. After adjusting it, the call works fine.

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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:** [February 12, 2021, 4:01pm UTC](https://devforum.zoom.us/t/add-webinar-registrant-runs-into-status-415-error-code-300/43032/4 "2021-02-12T16:01:09Z")

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Hi @reiner.velte,

Thank you for confirming this. We will take a look at the collection as well!

Best,  
Will

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**Author:** ![reiner.velte](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/reiner.velte/32/22860_2.png) [@reiner.velte](https://devforum.zoom.us/u/reiner.velte)\
**Post date:** [February 12, 2021, 4:20pm UTC](https://devforum.zoom.us/t/add-webinar-registrant-runs-into-status-415-error-code-300/43032/5 "2021-02-12T16:20:43Z")

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Hi Will,  
Ah, very good; I didn’t know that the Postman collection comes from your side.  
I had to change the content type to application/json (as you said already) and to specify the body in raw JSON.  
I find Postman very handy for testing any REST API.

Thanks,  
Reiner

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**Author:** ![MaxM](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/maxm/32/42303_2.png) [@MaxM](https://devforum.zoom.us/u/MaxM)\
**Post date:** [February 12, 2021, 11:31pm UTC](https://devforum.zoom.us/t/add-webinar-registrant-runs-into-status-415-error-code-300/43032/6 "2021-02-12T23:31:45Z")

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Hey @reiner.velte,

Thank you for the update. I use the collection frequently for testing myself and have noticed this same issue. We’ll look into updating it so this isn’t a problem in the future. (DEVELOPERS-1004)

Thanks,  
Max

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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:** [March 15, 2021, 9:32am UTC](https://devforum.zoom.us/t/add-webinar-registrant-runs-into-status-415-error-code-300/43032/7 "2021-03-15T09:32:45Z")

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Closed on March 15, 2021, 9:32am UTC

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