Mautic API

I have read about the Mautic API and everywhere the term “base URL” is mentioned. What is the base URL fro mautic? And a similar question: In the docs on it says that I have to send a POST reqest to /oauth/v1/request_token. I have my Mautic installed on a VM on But if I navigate the browser to, I get a 404 error. Also if I navigate to, I get an error JSON wicht says “Looks like I encountered an error (error #400). If I do it again, please report me to the system administrator!” and Code: 400.

Did you found a solution?