Error in Sening POST data to SAP using Webhook

I want to send Quotation data in POST API from my localhost to SAP using Webhook. I want to send POST data on submit. I have Request URL, Headers and give other input properly in webhook. I added Content-Type, x-csrf-token and Authorization in header. Its working fine in Postman. But in Webhook I got this error

requests.exceptions.HTTPError: 403 Client Error: Forbidden for url

Is there any way to resolve this issue?