WebCheck
One public page. No account is required. About ten checks a minute. The number is HRP's own checklist, not a Google score and not an accessibility certificate.
What this number means
Ten items, ten points each. A missing description is not the same as a page that did not answer. HTTPS says the connection is encrypted. It does not mean the whole site is safe.
What you can do next
A redirect chain is a different tool: redirect checker. Links on one page: broken links. Labels on a shared link: share preview. The size of one image: image tool.
The paid checkout is closed, and a key is not created automatically. You can ask for an API trial yourself: Request a trial.