We propose a methodology for studying food delivery companies based on the two circuits of the urban economy. This methodology recognizes the need to understand the so-called platform capitalism and its corollary -- the uberization of the service sector -- as one of the manifestations of technological modernization and its repercussions on the political economy of the city. In this sense, we ground the methodology in the notions of verticality, horizontality, technosphere, psychosphere, and in the theoretical proposition of the two circuits of the urban economy. We emphasize that this methodology was developed and applied in research aimed at understanding the actions of food delivery companies in the city of São Luís, MA, in the year 2020, and the results are discussed primarily in Aguiar (2021) and Nobre et al. (2023). [ABSTRACT FROM AUTHOR]