I am using MongoDB Atlas and their API to access a Mongo DB Cluster from my AppStudio QML application. Then is just http requests from the application to API. Link: API — MongoDB Atlas As for accessing a local instance of MongoDB, I'm not sure. My application needs are mobile, so working with the API is the key for me. I did look into the Mongo DB C++ driver at one point, with the thought that I could incorporate the MongoDB driver directly into my app with it's own class. Link: MongoDB C++ Driver Manual Link: Integrating QML and C++ | Qt QML 5.10
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