In less than 10 years, molecular networking (MN) strategy has revolutionized the art of Natural Products (NP) isolation to enter a rational workflow greatly increasing the probabilities of isolating new chemical entities. To pinpoint and streamline the isolation of new Monoterpene Indole Alkaloids (MIAs) in producing plants, we rendered publicly available the MIA database (MIADB), comprising MS(2) data for ca. 200 structurally diverse MIA, by uploading it to the Global Natural Products Social Molecular Networking (GNPS) platform. Here, we describe the key experimental aspects underlying data collection, data curation, and their subsequent upload to the GNPS libraries as a database. Practical tips are also provided at the end of this chapter to help optimizing the efficiency of the dereplication of MIA-containing plants against the MIADB-implemented GNPS library. CI - (c) 2022. The Author(s), under exclusive license to Springer Science+Business Media, LLC, part of Springer Nature.