How easy is it for developers to upload data to Filecoin through Estuary? As easy as copy and paste. However you do need an API key.

curl -L -X POST 'https://api.estuary.tech/content/add' -H 'Accept: application/json' -H 'Authorization: Bearer YOUR_API_KEY' -F 'data=@"/path/to/file"'

If you have an account you can use Estuary until you hit your size limit, otherwise the service is closed off to sign ups. Thanks for using us.