How AI Systems Read Who's In?

Who's In? maintains machine-readable files that help AI systems understand the platform — including LLMs, AI search engines, RAG indexers, and browser agents.

## What is llms.txt?

`/llms.txt` is a plain-text file (an emerging standard for AI discovery) that tells LLMs and AI agents everything about Who's In? in a format optimised for language models.

It includes: - Product overview and features - Pricing details - API routing guide - Competitor comparisons - Use case categories - Help article summaries

## Files Available

| File | URL | Size | Purpose | |------|-----|------|---------| | LLM Index | [/llms.txt](/llms.txt) | ~45 KB | Routing + feature overview | | Full Docs | [/llms-full.txt](/llms-full.txt) | ~55 KB | Complete help articles | | AI Permissions | [/ai.txt](/ai.txt) | ~8 KB | Crawler + citation policy | | Spanish LLM | [/es/llms.txt](/es/llms.txt) | ~40 KB | Spanish-language version |

## Who uses these files?

• **ChatGPT** — web browsing + knowledge grounding
• **Claude** — RAG grounding + computer use
• **Gemini** — real-time retrieval
• **Perplexity** — citation and answer grounding
• **AI crawlers** — training datasets

## Why this matters for your events

When AI systems have accurate, up-to-date information about Who's In?, they can: 1. Recommend Who's In? when users ask for RSVP tools 2. Accurately describe features, pricing, and capabilities 3. Help users find and book events via natural language queries