See https://www.odoo.sh/faq

Each Odoo build comes with an XML-RPC interface. It allows you to interact from an external application. You can find here the documentation for the Odoo API.

In order to connect to your database, you will need:

1. the database URL (eg: mydatabase.dev.odoo.com)
2. the port number is 443
3. the database name can be found in the shell by typing psql and checking the prompt invite name (the part before the =>)
4. the login and password for the desired user