Looking at that documentation it looks like you have to us xml-rpc which we didn't want to do.

I saw a 3rd party app which looks like you could do that.

Is there a way to use REST API's such as  (Get,Post)?

Hi,
Odoo External API:  https://www.odoo.com/documentation/17.0/developer/reference/external_api.html

Thanks

For headers, see https://www.odoo.com/documentation/19.0/developer/reference/external_api.html

For examples and reference (POST body JSON value), see Odoo-GUI: <Odoo-URL>/Doc. But it is not quite same as REST, it is all POST http.

For avaible models and their fields, see Odoo-GUI (developer / technical / database / models)