Chishing,
Sorry we missed your previous post. A few notes:
1. You do need to have at least read-permissions for an organization in order to access any endpoint that requires an `X-Organization-ID` header. There are other endpoints which require OAuth tokens to access on behalf of a user where you can use that approach instead.
If you are after events from our calendar, I would highly recommend our new GraphQL API which is desired for building mashups and uses a more straightforward API key. You can see docs here:
https://assets.motorsportreg.com/gec/docs/. To get an API key, please contact our support team thru MotorsportReg.com and they can assist.
2. You will get 401 if you don't have the right access - so that's expected. #1 will solve it!
Brian