Legit.Show measured StemJSON's Security frame at 25/100. No Content-Security-Policy and no HSTS. Served over HTTPS with a valid certificate.

How does Legit.Show measure StemJSON?

Legit.Show scores seven frames — Performance, Accessibility, Security, Privacy, Reliability, Standards and Discoverability — deterministically from the public surface (URL, HTTP headers, real Lighthouse), with no LLM in the scoring path. See legit.show/methodology.

Frameworks & Starter Kits

StemJSON

Last updated 2026-09-14 · benchmark measured 2026-09-14 — deterministic & reproducible

StemJSON is a declarative JSON-based language for building native mobile app UI and logic.

75/100

7/7 frames

Top 60% of 14,138 measured

Legit Benchmark — the simple average of 7 measured frames. Frames we could not measure are left out of the average, never counted as zero. Every frame is shown below with its evidence.

Checked 2026-09-14 · scores move as sites change

Are you the maker of StemJSON? Claim this listing. It is free, takes a meta tag, a DNS record or GitHub admin rights, and never changes the score.

Launched something? Add your product, free.

To cite this score: legit.show/s/stemjson-com/2026-09-14. That address never changes; this page moves with every re-measure.

Legit.Show scored StemJSON 75/100 on 2026-09-14, measured across all 7 frames from its public surface. legit.show/s/stemjson-com/2026-09-14

Is StemJSON production-ready?

Legit.Show scores StemJSON 75 out of 100 — the simple average of its 7 measured frames. Legit.Show ran its deterministic 7-Frame production-readiness benchmark on StemJSON (public-surface assessment), measured from the public surface with no LLM in the scoring path. Its strongest frame is Accessibility; its weakest is Privacy. Every frame it averages is published with its evidence on the Legit.Show listing.

The 7 Frames

Performance — 91/100
Accessibility — 100/100
Security — 25/100
How this compares across the catalogue: The Web Security Baseline
Privacy — 25/100
How this compares across the catalogue: The Privacy Gap
Reliability — 100/100
Standards — 92/100
Discoverability — 90/100

What we measured

No Content-Security-Policy and no HSTS.
Served over HTTPS with a valid certificate.
Real Lighthouse performance run — 131 ms to first byte.
Returns a proper 404 for unknown routes.
3 of 3 sampled routes reachable.
No privacy policy found.
Sets cookies / loads scripts with no consent prompt.
Discoverable: structured data, OpenGraph image, canonical URL.

Who it's for

Mobile developers · AI builders · Backend teams · Product designers · App creators

Pricing

Free tier, no time limit

Sources and updates

Description: Taken from stemjson.com's own website on 2026-09-14.
Operator: Vasyl Krychun, as named in stemjson.com's terms, privacy page or footer.
Benchmark: Measured by Legit.Show from the live site, the way any visitor sees it — with no access to its code or accounts. Same method for every product, and no AI decides the score. Last checked 2026-09-14.

Put together from public information, without StemJSON's involvement. If anything here is wrong, tell us and a person will check it.

Visit StemJSON → · Alternatives to StemJSON → · How this was measured →