Hi, you cant at present. New features to the API get added to Sage 200 standard first and then are added to each release of the 200 Pro API. You can see on the link below that the 200 standard API now has a sop_quotes endpoint and so the assumption is that this will be added to the Sage 200 Pro API when the next release of 200 Pro comes out.

However, it is worth noting I am not sure how this affects 200 Extra releases so if its specifically 200 Extra you are interfacing into and not 200 Pro it still my not work.

https://developer.columbus.sage.com/docs#/uk/sage200/accounts/v1/sop_quotes

Ok, is there a comprehensive Sage 200 Extra developer guide like https://developer.sage.com/accounting/guides/ ? 

Not to that level. Only what you have access to via developer.columbus.sage.com/docs

Ok that sucks. Hope Sage updates their Sage 200 documentation.

To be fair once you have the functions to connect and process data the rest just becomes a reference of new endpoints and fields.

Sage 200 Extra does not have an endpoint that creates a quote. It's one of our business requirements to create quotes in Sage 200 Extra.

Not at the moment no. But I am not sure if its being added to it as part of a future Sage 200 Extra release. It would be best to specifically query this through your Sage 200 Extra Business Partner.

The account I'm using is subscribed to Sage 200 Unlimited but it seems I'm only able to query Sage 200 Extra APIs. Quote creation is in Sage 200 API but I can't query Sage 200 API for some reason so I filed a support ticket. 

Hi Via,

As already discussed with yourself, the Sage 200 API is for Sage 200 Standard Online - as you are using Sage 200 Professional you will not be able to use the Sage 200 API endpoints, as this is targeting the incorrect version of Sage 200.

Please keep an eye out on the Whats New section of the Developer documentation for new endpoint availability for Sage 200 Extra API