Are there any restrictions on URL when it comes to Webhooks?

Question

Hi all, I am trying to set up a webhook in Trados Cloud. When I enter the URL, I get a validation error that it is incorrect, despite the fact that it is accessible from the web. 
 Error message 
 
 POST /lc-api/webhook-management/v1/webhooks Validation exception. Please contact support for more details.

Trace ID 
 
 20250108105433_dc01d901-f41f-4883-b26b-0d098685ebbf 
 Parameters

{}

Response

{
 "errorCode": "VALIDATION_EXCEPTION",
 "message": "Input validation errors",
 "details": [
 {
 "name": "url",
 "code": "invalid",
 "value": "https://dev-new.tolingo-nifi.sunzity.de:8903/trados"
 }
 ]
}

Laszlo David · Answer

Bartosz Gumuła 
 Hi Bartosz, we have a guarding implemented for malicious webhook callback URL's, and this is internally enforced via a regex. 
 in your specific case from above seems that the regex is not matching the part which contains the port `:8903` 
 Is there a possibility for you to adapt the callback URL, or should we log a Change request, to analyze and adapt the validatator to accept ports in the callback URL? So anwsering to your question, yes there are some restrictions in place. And currently we do not support port numbers in the URL.

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Are there any restrictions on URL when it comes to Webhooks?