MassMine is a command line tool designed for researchers to simplify the collection and use of data from online sources such as social media networks. Geared toward novices and power users alike. Designed for use on personal computers or on headless servers. Handles the acquisition of API data while managing rate limits imposed by these services. Makes setting up custom data requests easy, allowing for flexible deployment for individualized research needs. Creates and manages databases of collected data automatically. This means that all tweets, trends, posts, etc. related to your research questions are saved permanently on your local hard drive. Designed for long-running data collection projects. MassMine makes it easy to create your own database of social media content spanning days, months, or years.