Problem to create a webhook

Problem to create a webhook

Hi Zoho Support,

I am trying to create a webhook to listen tickets update events and I got an error.

POST https://desk.zoho.com/api/v1/webhooks

This is the body:

{
"subscriptions" : {
  "Ticket_Update" : null
},
"isEnabled" : true,
"url" : "https://200.106.245.34/jcn-client/tickets"
}


This is the response:
{
    "errorCode": "UNPROCESSABLE_ENTITY",
    "message": "Validation failed for the condition : The endpoint failed to respond with status code 200 "
}


Can you help us please what could be the error? or the domain needs a valid certificate in order to create?

Thank you,

Best Regards,
JCN