Operational MRMS products are available in realtime from NCEP via HTTP and LDM in GRIB2 format.

MRMS data can be accessed from NCEP in two ways:

HTTP

From https://mrms.ncep.noaa.gov/data/

LDM

To request LDM data access, please submit the Google Form. You will need to provide your IP address, contact name, phone number, and email. Once submitted, NCEP Central Operations (idp-support@noaa.gov) will followup with host details, available LDM feed types, and additional setup instructions.