WEB_BLOCKED_BY_ROBOTS
HTTP 403No
NEW code. Target URL is disallowed by robots.txt / ToS; scrape is read-only and honors robots — it will not bypass. param=url.
By default a failed call returns a result with an error instead of throwing, so your business flow is never interrupted.
Published error codes are permanent: their meaning never silently changes, and deprecated codes keep returning for at least 12 months.