{"preview":true,"note":"Response shape only. The paid GET /advisory-fix-availability-check takes a GHSA or CVE id, reads the advisory from OSV, and checks the package registry for every version the advisory names as fixed. versions_in_registry is the control: a non-zero count proves the registry read worked, so a missing version means absence rather than a failed probe. Demand for this route is not measured.","example":{"advisory":"GHSA-97m3-w2cp-4xx6","status":"fix_missing","ecosystem":"npm","package":"node-ipc","fixed_versions":["10.1.3"],"missing_versions":["10.1.3"],"versions_in_registry":75,"latest":"12.0.0","actionable":true,"detail":"The advisory names 10.1.3 as fixed, and the registry does not carry that version - 75 other versions are present, so this is absence rather than a failed read. Anyone following this advisory literally cannot install the fix.","checked_at":"2026-08-16T06:00:00.000Z"}}