If your ok. with UTC then you can simply use {{Now}} in the system prompt ! .. that would take the server time ! .. For n8n not successfull , i'm sure you're doing somthing wrong ... If you're using a tool to call and return the correct time You need to make sure you're returning the toolId and the response, in the prpoer format .. but if you're injecting through controlURL , then also make sure you're respecting the response format vapi is expecting .. if n8n is not working with Response Webhook , try to format the response json , and change the webhook to respopnse when last node finishes ... I hope that help