# Validating Server to Server Endpoint URL

**URL:** <https://devforum.zoom.us/t/validating-server-to-server-endpoint-url/133284>\
**Category:** API and Webhooks\
**Tags:** api\
**Created:** [May 28, 2025, 10:49am UTC](https://devforum.zoom.us/t/validating-server-to-server-endpoint-url/133284 "2025-05-28T10:49:48Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Jon1989](https://avatars.discourse-cdn.com/v4/letter/j/74df32/32.png) [@Jon1989](https://devforum.zoom.us/u/Jon1989)\
**Post date:** [May 28, 2025, 10:49am UTC](https://devforum.zoom.us/t/validating-server-to-server-endpoint-url/133284/1 "2025-05-28T10:49:48Z")

</div>

### Format Your New Topic as Follows:

**API Endpoint(s) and/or Zoom API Event(s)**  
_Link the API endpoint(s) and/orZoom API Event(s) you’re working with to help give context._

Endpoint URL Validation

**Description**  
_Details on your question, workflow or the problem you’re trying to solve._  
I’m trying to validate a Power Automate Endpoint URL. However it will not validate. I’ve used a webhooksite tester URL and that validates fine, however the power automate URL will not validate.  
From other topics I’ve found that you must set a custom Auth header & must set up a response for the CRC However even after setting these up Validation is still failing.

**Error?**  
_The full error message or issue you are running into, where applicable._

When selecting Validate I get the following Error:  
URL validation failed. Try again later.

**How To Reproduce**  
_Steps to reproduce the behavior:_  
_1. Request URL / Headers **(without credentials or sensitive info like emails, uuid, etc.)** / Body_  
Validate Request sent to Power Automate:  
{  
“payload”: {  
“plainToken”: “CaA4i4GMT6qugjVidrb6HQ”  
},  
“event\_ts”: 1748362518271,  
“event”: “endpoint.url\_validation”  
}  
Response Sent to Zoom:  
{  
“statusCode”: “200”,  
“headers”: {  
“Content-Type”: “application/json”  
},  
“body”: {  
“plainToken”: “CaA4i4GMT6qugjVidrb6HQ”,  
“encryptedToken”: “a0d33113947ed01b99050e11585ca4ffd1f28151dfcad979be36b60da8d753b9”  
}  
}  
_2. Authentication method or app type_  
_3. Any errors_

Any help, or an example response i can reverse enginnerr would be appreciated

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<div class="post-metadata">

**Author:** ![elisa.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/elisa.zoom/32/47836_2.png) [@elisa.zoom](https://devforum.zoom.us/u/elisa.zoom)\
**Post date:** [May 29, 2025, 5:37pm UTC](https://devforum.zoom.us/t/validating-server-to-server-endpoint-url/133284/2 "2025-05-29T17:37:00Z")

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Hey @Jon1989  
Thanks for reaching out to us!  
Have you had a chance to review our sample app?

> <https://github.com/zoom/webhook-sample/blob/master/index.js#L31>

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<div class="post-metadata">

**Author:** ![Jon1989](https://avatars.discourse-cdn.com/v4/letter/j/74df32/32.png) [@Jon1989](https://devforum.zoom.us/u/Jon1989)\
**Post date:** [May 29, 2025, 9:01pm UTC](https://devforum.zoom.us/t/validating-server-to-server-endpoint-url/133284/3 "2025-05-29T21:01:52Z")

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Hi Elisa,  
Thanks for the response. I’ve managed to resolve the issue.  
The issue was with my hash function not outputting the correct value as it was using the secret key as a string instead of the byte value.

Thanks again,

Jon

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<div class="post-metadata">

**Author:** ![elisa.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/elisa.zoom/32/47836_2.png) [@elisa.zoom](https://devforum.zoom.us/u/elisa.zoom)\
**Post date:** [May 30, 2025, 4:30pm UTC](https://devforum.zoom.us/t/validating-server-to-server-endpoint-url/133284/4 "2025-05-30T16:30:34Z")

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Thank you so much for sharing your findings with the Community! @Jon1989

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<div class="post-metadata">

**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:** [May 31, 2025, 4:31pm UTC](https://devforum.zoom.us/t/validating-server-to-server-endpoint-url/133284/5 "2025-05-31T16:31:09Z")

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Closed on May 31, 2025, 4:31pm UTC

This topic was automatically closed 24 hours after the last reply. New replies are no longer allowed.