If it works in Postman but not in n8n, it’s usually not the endpoint, it’s the request itself
Compare the headers from Postman with the ones n8n is sending. Authorization, Content-Type, Accept, and any custom headers all need to match
Also check whether Postman is automatically handling authentication or redirects behind the scenes. Exporting the Postman request as cURL is a good way to compare it against what n8n sends.