Independent AI verification

Catch the citations AI invents.

ENIGMA Axiom checks every DOI, paper and claim in a ChatGPT, Claude, Gemini or Deepseek answer against authoritative databases — then has a panel of independent models cross-examine it. Never trust an AI to grade its own homework.

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No sign-up needed to try — 20 free checks every 4 hours.

Verify a claim or citation

Paste an AI answer (or any claim with a DOI, arXiv ID or PubMed ID) and we'll tell you whether the sources are real and whether they say what was claimed.

How it works

1

Extract

We pull every citation out of the answer — DOIs, arXiv IDs, PubMed IDs, case law.

2

Check it's real

Each citation is looked up in authoritative indexes — Crossref, PubMed, OpenAlex, arXiv, CourtListener.

3

Cross-examine

An independent panel of LLMs judges whether the claim matches the source — not the model that wrote it.

Pricing

Limits reset every 4 hours.

Free

$0

20 checks / 4h

  • No account needed
  • Citation verification
  • Chrome extension
Try now

Account

$0

30 checks / 4h

  • Everything in Free
  • History & saved checks
  • Higher limit
Sign up free
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Pro

$19/mo

100 checks / 4h

  • Everything in Account
  • Priority verification
  • API access (beta)
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