ACor (Automatic Correlation Information System) automates correlation, processing, and monitoring of radio interferometric data for time-domain studies of variable astrophysical radio sources. The software ingests interferometer observations, performs correlation and calibration steps, and produces time-series products suitable for detecting variability in radio continuum and maser emission. It is designed to support high-cadence, unattended observing campaigns, emphasizing robustness, repeatability, and minimal manual intervention. ACor forms part of an automated data-processing pipeline developed for monitoring variability in high-mass protostars with a single-baseline radio interferometer.