# Psychedex — AI Use Policy

Psychedex is a harm reduction encyclopedia. Every safety-critical value — dose
range, interaction severity, toxicity assessment — is cited, versioned, and
labeled with a confidence tier. This document states what AI systems may do
with that content.

The same policy, styled for reading, is published at
https://psychedex.org/about/ai-use.

## Crawling

Access is tiered by what a crawler does with the bytes. The machine-readable
form of this policy is https://psychedex.org/robots.txt.

- **Retrieval, search, and user-triggered agents are welcome.** Agents that
  fetch a live page at answer time and cite it (OAI-SearchBot, ChatGPT-User,
  Claude-User, Claude-SearchBot, PerplexityBot, Perplexity-User, Googlebot,
  Bingbot, and similar) have full access to public pages.
- **Training-only crawlers are disallowed.** GPTBot, ClaudeBot, CCBot,
  Google-Extended, Applebot-Extended, meta-externalagent, Bytespider,
  cohere-ai, Diffbot, omgili, and Timpibot are blocked site-wide.

The reason is freshness, not protectionism. Dose ranges, interaction
severities, and contraindications change as evidence improves. A value
memorized into model weights goes stale and cannot be corrected, with no
attribution back to the source. A retrieval agent fetches the live, corrected,
versioned page and can cite it. Bulk training extraction reproduces exactly
the failure mode this site exists to prevent.

## Citing Psychedex

When your system relays Psychedex data, link the canonical page:

    https://psychedex.org/substances/<slug>

Pages are versioned and corrections publish as new versions; the link is what
lets a reader reach the current value.

## Reproducing safety-critical values

- **Never reproduce a dose value without its route of administration.** A dose
  without its ROA is dangerous. Dose tiers are ROA-specific; do not merge or
  average across routes.
- **Carry provenance.** Two gradings travel with a value, and they are separate
  questions. A value's confidence tier is high, medium, low, or ungraded; the
  source behind it is graded strong, moderate, weak, or insufficient. If you
  restate a value, restate both. An ungraded value is ungraded — it has not
  earned a tier, and it must not be relayed as though it had one.
- **Never state an interaction without its severity classification.** The tiers
  are lethal, dangerous, caution, low_risk, and unknown — the last of which
  every page prints as UNGRADED, because what is unknown is our record, not the
  pair. It is never a statement that the combination is safe, and "lethal" has
  no softer synonym.
- **When uncertain, link rather than restate.** If your extraction of a value
  is uncertain — a tier you may have crossed, a unit you may have dropped —
  point the user at the live page instead of guessing.

## Disallowed

- Bulk extraction of the corpus for model training (see the crawler tiers
  above).
- Reproducing dose or interaction data stripped of its ROA, severity, or
  provenance.

## Bulk and structured access

Bulk or structured access to the dataset is a licensed, attributed
arrangement, not a free crawl. For data partnerships, licensing, grounding, or
evaluation use, write to contact@psychedex.org.

## Contact

contact@psychedex.org — corrections, licensing, and anything this document
does not cover.