Preorders are available over the partner REST API, authenticated with scoped tokens issued from the Admin Portal. Partners can also subscribe to event destinations, so a system stays current without polling for changes.
Partners who sell alongside a dealer have always been able to see preorders in the portal. Now they can read them programmatically.
What you can read
Preorders are available over the REST API at GET /preorders, with the same shape the portal shows. A partner building against it gets order state without anybody exporting a spreadsheet.
Tokens you control
Access uses scoped API tokens, issued from the Admin Portal and revocable there. A token carries only the scopes you grant it, so an integration that needs to read preorders cannot do anything else.
Stop polling
Event destinations let a partner subscribe to changes rather than ask repeatedly whether anything happened. The system on the other end stays current, and neither side pays for the polling.
Where to find it
Admin Portal, Settings, then API tokens. The endpoint reference sits with the rest of the partner API documentation.