Hi Umair, thanks for sharing these extra details and your app install link.
Unfortunately, I will not be able to install it in my production portal, because “Contacts.read” is one of the most sensitive scopes to grant to a 3rd party app. Under GDPR and SOC2/ISO27001, protection of contact data, including names and email addresses, is paramount. Your app reading and copying contacts and their properties to an external system would be a showstopper for us. It is likely to be a sensitive issue for other live production portals as well.
What I recommend is that you publish the content that you have planned for your marketplace listing, onto a web page that you control. There you can use it for promoting your (beta) app, to attract your first potential beta-test clients who need to solve the problem that your app addresses, and would be open to installing it for beta test.
Use the real feedback from three customers to improve and publish your listing. It makes for a better listing and is a key reason why HubSpot requires the three production portal installs.
Sorry I can’t help further by installing it with Contact.Read scopes, but hopefully this article and context will help you with your next steps to launching your app!
best
Pete