Validate a site's PWA Web App Manifest. Finds <link rel="manifest"> on a page, fetches the manifest, and checks it against the W3C spec and Chrome install criteria. Returns graded issues, installability blockers, and an icon summary as JSON. A validate endpoint checks a pasted manifest offline.
Fetch a page, find its <link rel="manifest">, and validate the Web App Manifest against the W3C spec and Chrome install criteria. Returns a grade, score, issues, installability blockers and icon summary.
Validate a manifest JSON you provide (body: {"manifest": {...}, "manifestUrl": optional}). Offline, no outbound fetch.
Easiest way: the APIHub CLI. Credits cover x402, no wallet needed.
# install and set up once
npx @apihubio/cli register
npx @apihubio/cli topup 10
# call this service
npx @apihubio/cli call -X GET "https://proxy.apihub.io/web-manifest/v1/check?url=https://web.dev"Or call the proxy directly (curl / any HTTP client):
curl https://proxy.apihub.io/web-manifest/v1/check?url=https://web.dev \
-H "Authorization: Bearer ahk_your_key"
# If credits available: charged automatically, returns 200
# Otherwise: returns 402 (pay via @x402/fetch or top up credits)Estimate your monthly cost for Web App Manifest Checker.