This API can't be called using an OAuth access token. A valid developer API key must be provided in the hapikeyquery parameter, and a validappId must be provided in the API request.
When using Properties API
/crm/v3/properties/{objectType}/batch/read
The api docs doesn’t seem to mention that any additional authentication should be passed along with oAuth.
Thanks for the reply!
I’m actually using Public App with oAuth authentication, according to the docs it should be possible to use this API with oAuth authentication, am I missing something here?