In APIs and other web services, you need to specify the company name or ID. Where the company name is readily available, the (in my view more proper) company ID - which is the system ID of the company in the Company table - is not easily retrievable. For OData web services, we have the url in the web services page, but since we are moving more and more to APIs, this information is not readily available. You need to go to Page Information in order to retrieve it which is cumbersome.

I would therefore suggest making the company ID available in the Companies list page.