Link previews are a hard problem for a small platform like this: everyone treats your platform as if you're a scraper and returns 403: Unauthorized. And CORS prevents you from using the user's JavaScript client from grabbing metadata too!
Note
Link previews are a hard problem for a small platform like this: everyone treats your platform as if you're a scraper and returns 403: Unauthorized. And CORS prevents you from using the user's JavaScript client from grabbing metadata too!