There's other companies out there doing it but they charge people. Steemit is open source and you can clone the steemit site and figure out a front end portal to post from.. I too am interested in the api though.. there is front end tools to do it but I haven't gone that route yet as I know they encourage development through the platform.. working on figuring this out though.. @Mogu1#9892 on discord if you want to hit me up.