MacOS Monterey added a CLI tool for speedtesting, and I noticed they have a

  -c: Produce computer-readable output

So I tried it out:

  ~ networkquality -c | jq '{dl: (.dl_throughput / 1000000), ul: (.ul_throughput / 1000000)}'

awesome!

  {
    "dl": 176.861488,
    "ul": 6.742952
  }

(Starlink in Perth, Western Australia)