Missing Organization Feature: ApiAndPlatformEvents and Missing Organization Feature: ApiAndHighVolum

Help I tried to install the Slack App in a Professional Edition instance and received this: This app can’t be installed. There are problems that prevent this package from being installed.

Missing Organization Feature: ApiAndPlatformEvents

Missing Organization Feature: ApiAndHighVolumePlatformEvents error:

API access is required to use Skuid,  and Professional edition does not allow API access.   Sorry.   Look at this post for discussions about possible hope:  http://community.skuid.com/skuid/topics/is-it-possible-to-connect-to-a-salesforce-professional-license-org-from-the-skuid-platorm

(But you said Slack?  Did you post this to the wrong place?  Sorry…)