I have a third party blogger app which uses the postid to store data on my database, when people read the data, they want me to somehow produce the text from their blog. If there was a read access without the password, then I could get this information without having to store a table full of usernames and passwords, something I'm not too keen on having. The problem with storing the atom.xml feeds is that there are a lot of posts and a lot of users, and it would be much quicker, and use less storage to send an Atom API request.