The following is an example of output produced by the /list API for the companies in a V‑Spark installation:

[
    "TestCompany",
    "Testing",
    "DocTestCo",
    "WebAPITest",
    "Limitedhours",
    "CNCO",
    "JWebAPITest"
]

The /list API enables code to quickly extract a high-level view of the companies in a V‑Spark installation, but does not itself provide enough information for you to drill down into that installation.