I need to trigger Twilio Flow Rest API via a webhook that freshdesk have on the automation feature.
I configure the automation with webhook service: https://webhook.site and i received the data.
Freshdesk Automation Webhook configuration
When I use POSTMAN to trigger the flow it works perfectly.
Based on your screenshots, you are sending the data differently to Twilio with each approach.
The Freshdesk example is sending application/json but Postman (which you indicated works) is using form-data.Try selecting X-FORM-URLENCODED on the Freshdesk side.
Creating or Updating Resources with the HTTP POST and PUT Methods
"Creating or updating a resource involves performing an HTTP PUT or HTTP POST to a resource URI. In the PUT or POST, you represent the properties of the object you wish to update as form urlencoded key/value pairs. Don't worry, this is already the way browsers encode POSTs by default. But be sure to set the HTTP Content-Type header to "application/x-www-form-urlencoded" for your requests if you are writing your own client."