# Calendar booking api throws HTTP 500 errors

**URL:** <https://community.hubspot.com/t/calendar-booking-api-throws-http-500-errors/128854>\
**Category:** APIs & Integrations\
**Tags:** professional\
**Created:** [March 28, 2025, 10:08am UTC](https://community.hubspot.com/t/calendar-booking-api-throws-http-500-errors/128854 "2025-03-28T10:08:47Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![pesterhazy](https://avatars.discourse-cdn.com/v4/letter/p/ecb155/32.png) [@pesterhazy](https://community.hubspot.com/u/pesterhazy)\
**Post date:** [March 28, 2025, 10:08am UTC](https://community.hubspot.com/t/calendar-booking-api-throws-http-500-errors/128854/1 "2025-03-28T10:08:47Z")

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I’m sending api requests to the /scheduler/v3/meetings/meeting-links/book endpoint.

The endpoint is throwing HTTP 500 errors with the request body below. Furthermore, the format of the form fields is not documented so it’s hard to know if I’m sending the right info.

{  
“slug”: “MYSLUG”,  
“startTime”: 1743451200000,  
“duration”: 1800000,  
“timezone”: “Europe/Paris”,  
“firstName”: “Foo”,  
“lastName”: “Bar”,  
“email”: “[email@address.com](mailto:email@address.com)”,  
“formFields”: [  
{  
“name”: “phone”,  
“value”: “+491511234123423”  
}  
]  
}

Error: Error: 500 - {“status”:“error”,“message”:“internal error”,“correlationId”:“41d8e13c-c76b-4994-899b-1403af8cae97”}

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<div class="post-metadata">

**Author:** ![Jaycee\_Lewis](https://d10pqhm3lwygmk.cloudfront.net/user_avatar/community.hubspot.com/jaycee_lewis/32/61352_2.png) [@Jaycee\_Lewis](https://community.hubspot.com/u/Jaycee_Lewis)\
**Post date:** [April 1, 2025, 10:22pm UTC](https://community.hubspot.com/t/calendar-booking-api-throws-http-500-errors/128854/2 "2025-04-01T22:22:29Z")

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Hey, @pesterhazy 👋 Were you able to make any progress here? — Jaycee

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<div class="post-metadata">

**Author:** ![pesterhazy](https://avatars.discourse-cdn.com/v4/letter/p/ecb155/32.png) [@pesterhazy](https://community.hubspot.com/u/pesterhazy)\
**Post date:** [April 9, 2025, 7:47am UTC](https://community.hubspot.com/t/calendar-booking-api-throws-http-500-errors/128854/3 "2025-04-09T07:47:36Z")

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Yes it works now. I’m assuming it was fixed on the Hubspot side