An instrument, not a vendor.
The aesthetic of measurement, applied to absence.
Reference class: metrology bureaus, assay offices, ratings notation, Swiss information design. Not security vendors, not dev-tool defaults, not AI branding. The registry's product is judgment made legible · so the identity is evidence, not decoration.
Set in Neue Haas Grotesk / Suisse Int'l · shown here in the closest system stand-in. Never title-case, never "ZDR Inc.", never a gradient.
A hairline circle with one index tick: an instrument dial resting at zero. It is a numeral, a gauge, and an empty set at once · and it is not a padlock. The limit notation (→0) appears only in documents, where engineers will read it as intended: the market tends toward zero.
Neue Haas Grotesk / Suisse Int'l
(board shows system stand-in)
Berkeley Mono (license) or IBM Plex Mono (free). Scores, receipts, diffs, timestamps · the data is the brand.
Source Serif / Lyon. Standards documents should read like documents, not landing pages.
Color is information. It appears in exactly one place · the score ramp · and nowhere else. When nothing colored is decoration, everything colored is trustworthy. 0.0 is the only inverted chip: the apex mark.
The badge · a hallmark, not a ribbon. Earned via architectural verification, never purchased. Machine-checkable at the URL it names.
The receipt · every proxied request returns its score and a signed evidence record. The compliance artifact auditors can consume.
Fable 5 requires 30-day retention on all platforms. Effective June 9, 2026. Source.
Anthropic just BROKE everyone's ZDR 🚨 Here's what you need to know…
Correction, Aug 25: Groq batch files retain 30 days. Score unchanged. Logged.
We're 99.9% accurate · the most trusted registry in AI.
We could not verify this claim. Marked C until documentation exists.
Trusted by 500+ industry-leading teams to empower their AI journey.
Declarative. Dated. Sourced. Zero adjectives, zero exclamation marks. RFC register (MUST / SHOULD) in the spec. Corrections are published, dated, and kept · the correction log is a brand ritual, not an embarrassment.
Independent scores for AI data-retention claims. 17 endpoints · monitored daily · corrections public.
| endpoint | score | verified |
|---|---|---|
| aws/bedrock · mode:none | ZDR 0.5 · A | 2026-08-25 |
| openai/api · zdr org | ZDR 1.0 (s,f,r) · A | 2026-08-25 |
| anthropic/claude-fable-5 · all platforms | ZDR 2.0 (s,h) · A | 2026-08-25 |
| google/gemini-api · paid tier | ZDR 2.0 (f,h) · B | 2026-08-24 |
| deepseek/api · first-party | ZDR 4.0 · B | 2026-08-24 |
No locks, shields, or vaults · we measure absence, we don't guard contents.
No gradients, glow, sparkles, or generated art. No mascots.
No customer logos on the registry. The registry advertises no one, including us.
No provider advertising, ever. No adjectives inside a score.
The mark is the notation. No vendor parent on the public instrument.
The identity does not get redesigned; it gets corrected. Austerity is the product.