$ headless-seo-check http://127.0.0.1:4314 --urls /static,/isr,/cjk --no-color
--- stdout+stderr ---
headless-seo-check: checking http://127.0.0.1:4314 …
headless-seo-check: 3 of 3 URLs selected, from --urls
headless-seo-check http://127.0.0.1:4314
  3 of 3 URLs checked, from --urls

  ! /static    rendering undetermined, 325 words
      info  rendering mode undetermined — the response headers say nothing about caching
            cache-control: no-cache, must-revalidate
            checked twice, the second response said no more
      warn  no canonical link in the served HTML
  ! /isr       rendering undetermined, 324 words
      info  rendering mode undetermined — the response headers say nothing about caching
            cache-control: no-cache, must-revalidate
            checked twice, the second response said no more
      warn  no canonical link in the served HTML
  ! /cjk       rendering undetermined, 268 words
      info  rendering mode undetermined — the response headers say nothing about caching
            cache-control: no-cache, must-revalidate
            checked twice, the second response said no more
      warn  no canonical link in the served HTML

  PASSED  no blocking issue, 3 warnings

--- exit code: 0 ---