Free check, then mark

EU AI Act Article 50(2) has applied since 2 August 2026. Systems already on the market before 2 August 2026 may need marking by 2 December 2026 under Article 50(2). This is not legal advice.

This page is the paid funnel. The free checker runs on this host. Paste what your AI generated — about ten seconds, no card.

• 1. Run the free detectability check on /article-50, or on Lab at lab.qenex.ai/api/v1/ai-act-check.
• 2. If the output is unmarked, subscribe to the Lab marking API. The key is issued after pay.

Live checkout

• Subscribe — Article 50(2) marking (£290 / month)
• Subscribe — Article 50(2) marking annual (£4,800 / year)

Lab home: lab.qenex.ai. Other Lab SKUs: Pricing. Dual-Rail Receipt (not marking): /receipt.

Offline verifier (no account): github.com/qenex-ai/qenex-verifier.

git clone https://github.com/qenex-ai/qenex-verifier.git && cd qenex-verifier && pip install -e ".[test]" && bash verify.sh

Exit 0 means the four reproducer SHAs match MANIFEST.sha256 (this environment reproduces the published bit-level v2 claims in this subset). ChemRxiv v2 is a self-assessed preprint, not peer-reviewed. This verifier subset is 22/22 chemistry checks here; that is not the full Lab 58/58. The verifier is not regulatory clearance and is not an Article 50 legal guarantee. A SHA mismatch does not mean every environment must match bit-for-bit — see the README BLAS/LAPACK note.