Documentation
AI Referrer Taxonomy
The 17 platforms in the built-in taxonomy, their referrer domains, and how to add custom entries.
AI Referrer Taxonomy
The AI Referrer Taxonomy is a list of known AI platform domains. When a session arrives with a referrer matching one of these domains, the session is classified as AI tools.
Built-in platforms — free tier
The free tier includes 17 platforms. The taxonomy is read-only in the free tier.
| Platform | Referrer domains |
|---|---|
| ChatGPT | chat.openai.com, chatgpt.com |
| Google Gemini | gemini.google.com, bard.google.com |
| Claude (Anthropic) | claude.ai |
| Perplexity | perplexity.ai, www.perplexity.ai |
| Microsoft Copilot | copilot.microsoft.com, bing.com/chat |
| Poe | poe.com |
| Grok (xAI) | grok.x.ai, x.ai |
| You.com | you.com |
| Character.AI | character.ai |
| Phind | phind.com |
| Kagi | kagi.com |
| Brave Leo | search.brave.com |
| HuggingChat | huggingface.co |
| Meta AI | meta.ai |
| Pi (Inflection) | pi.ai |
| Mistral Le Chat | chat.mistral.ai |
| DeepSeek | chat.deepseek.com |
Custom entries — Pro tier
Pro users can add, edit, and import custom platform entries. This is useful when a new AI platform launches before the built-in taxonomy is updated.
Custom entries are managed at WordPress Admin → Attribution → AI Taxonomy. Each entry requires:
- Platform name — display label
- Referrer domains — comma-separated list of domains to match
Custom entries are checked before the built-in taxonomy. A domain in a custom entry will always match that entry, even if the same domain appears in the built-in list.
Importing taxonomy from CSV — Pro tier
Upload a CSV file with columns platform and domains. Multiple domains per platform are separated by a pipe character (|). Existing entries with the same platform name are updated; new platforms are added.
Taxonomy updates: The built-in taxonomy is updated with plugin releases as new AI platforms emerge. Custom entries are not affected by taxonomy updates.
CQIP is a methodology standard, not a technology stack. Implementations exist for static PHP sites, WordPress, page generators, and other document management systems. The platform is the implementation detail — the standard and the eight canonical block types are consistent across all implementations.