The API is a simple and quick tool that allows you to build your own tools to see what pages are mobile-friendly.
Google’s John Mueller said, “The API method runs all tests, and returns the same information — including a list of the blocked URLs — as the manual test.” He added, “The documentation includes simple samples to help get you started quickly.”
The API test outputs include these three statuses:
- MOBILE_FRIENDLY_TEST_RESULT_UNSPECIFIED Internal error when running this test. Please try running the test again.
- MOBILE_FRIENDLY The page is mobile friendly.
- NOT_MOBILE_FRIENDLY The page is not mobile friendly.
You are able to access the API at developers.google.com/webmaster-tools/search-console-api.