The currently on-going K2 Campaign 9 is dedicated to a microlensing experiment, aimed at simultaneously observing gravitional microlensing events with K2 and from Earth in order to see a parallax effect in the shape and time of the lensing events. To allow such events to be identified and characterized rapidly, the raw data of this campaign are being released instantly through the data archive at MAST.
The data obtained during the first half of C9 (Apr 22 - May 18) are now available at https://archive.stsci.edu/pub/k2/c9_raw_cadence_data
The use of the level 1 data files requires an intimate understanding of their structure, as documented in KADN-26135. The Kepler/K2 Guest Observer Office has released a tool to convert these data into more traditional multi-extension image FITS files. The tool, called "kadenza", is available and documented at https://github.com/KeplerGO/kadenza
The traditional calibrated data products are scheduled to be processed and released by September 26.