Endpoint · market dataGETapi.sitecheck-api.workers.dev /api/apps/search ?country=us&limit=2&q=duolingo
Searches the App Store (iTunes Search API) by keyword, or looks up one app by its numeric id: name, developer, bundle id, price, rating and rating count, genres, version, release…
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Searches the App Store (iTunes Search API) by keyword, or looks up one app by its numeric id: name, developer, bundle id, price, rating and rating count, genres, version, release and update dates, size and store link. Country sets the storefront (default us). Ratings are the store's averages for that country. Limit max 50.Overview
Grade?
UNRATED
0 of 30 paid calls toward a letter
Price
$0.002 per call
Paid calls
none yet
delivery unknown until someone pays
More info
Seller?
URL
https://api.sitecheck-api.workers.dev/api/apps/search?country=us&limit=2&q=duolingo
MCP server on this host: io.github.bck-stack/sitecheck
Seen
first 7 days ago · last 17 hr ago
7 free handshakes
Payment
Pays through
x402
Offered on?
Arc, Base USDC, Solana, xrpl:0
Listed on?
Base, Solana
Score, from free handshakes onlyweights 2026.09.6
UN
RATED
RATED
0.274 liveness verified, no letter
To a letter · 30 paid calls
0 of 30
Held back by sample size, not by the seller · gap to 1.000 is 0.726: 0.526 uncertain ? + 0.200 short ? · 0.176 to D
| Component | Weight | Measured | Lower bound ? | Adds | Short ? | Uncertain ? | |
|---|---|---|---|---|---|---|---|
| livenesscosts the most it answered at all |
0.60 | 1.00 | 0.123 | 0.074 | 0 | −0.526 | |
| latency p95 it answered as fast as its class |
0.20 | 0.00 | 0.000 | 0.000 | −0.200 | 0 | |
| price stability the price stayed where it was listed |
0.20 | 1.00 | 1.000 | 0.200 | 0 | 0 | |
| Composite | 1.00 | 0.274 | gap to 1.000 = 0.726 · 0.200 short · 0.526 uncertain | 0.274 | −0.200 | −0.526 |
Not measured: correctness · nobody paid; honesty · nobody paid; schema conformance · no answer had a published shape to check
The multiplication, written out
0.600 × 0.123 liveness
+ 0.200 × 0.000 latency p95
+ 0.200 × 1.000 price stability
= 0.274 → UNRATED: 7 of 30 paid calls weights 2026.09.6 · 7 samples · seed cap_01M51M10BWZYZPV78DTYZSX40R|2026-09-23T03:00:47.566Z|2026.09.6
Verify it yourself
npx teppi-check https://api.sitecheck-api.workers.dev/api/apps/search?country=us&limit=2&q=duolingocurl -s https://api.teppi.xyz/v1/trust/cap_01M51M10BWZYZPV78DTYZSX40R