# Glossary of AI Agent Standards

All the key standards and technologies for website AI-readiness.

## Discoverability

- [robots.txt](/en/glossary/robots-txt) — indexing rules for bots
- [llms.txt](/en/glossary/llms-txt) — navigation for LLM agents
- [sitemap](/en/glossary/sitemap) — site map
- [ai-agent.json](/en/glossary/ai-agent-json) — agent description (Aiia spec)
- [link-headers](/en/glossary/link-headers) — Link HTTP headers

## Content Accessibility

- [schema-org](/en/glossary/schema-org) — JSON-LD structured data
- [markdown-for-agents](/en/glossary/markdown-for-agents) — Markdown content negotiation

## Bot Access

- [ai-bot-rules](/en/glossary/ai-bot-rules) — AI-bot rules in robots.txt
- [content-signals](/en/glossary/content-signals) — IETF Content Signals
- [web-bot-auth](/en/glossary/web-bot-auth) — RFC 9421 bot verification

## API / Auth / MCP

- [mcp-server-card](/en/glossary/mcp-server-card) — Anthropic MCP Server Card
- [a2a-agent-card](/en/glossary/a2a-agent-card) — Google A2A Agent Card
- [agent-skills](/en/glossary/agent-skills) — agent capability declaration
- [oauth-discovery](/en/glossary/oauth-discovery) — OAuth 2.0 Authorization Server
- [oauth-protected-resource](/en/glossary/oauth-protected-resource) — OAuth 2.0 Protected Resource
- [api-catalog](/en/glossary/api-catalog) — API endpoints catalog
- [ratelimit-headers](/en/glossary/ratelimit-headers) — rate-limit headers

## Concepts

- [aeo](/en/glossary/aeo) — Answer Engine Optimization
- [agent-readiness](/en/glossary/agent-readiness) — website AI-readiness
- [geo](/en/glossary/geo) — Generative Engine Optimisation