Upcoming database upgrades. to improve our reliability at 03:30 UTC on Feb. 25 / 7:30pm PT on Feb. 24. Some users may briefly experience slow load times or error messages. Learn more here
Unless you are added as a collaborator to a workspace or base, you cannot use the API to access that base’s information. This support page has more info on the different permission levels – https://support.airtable.com/hc/en-us/articles/202887099-Permissions