GEO / AI Search
agent.json
Definition
What is agent.json?
Emerging manifest file at the site root that declares an AI agent contract: supported tasks, content endpoints, authentication, MCP server location, license. The agentic-web companion to robots.txt and llms.txt.
Related terms
Cross-linked concepts
- MCP (MCP)Model Context Protocol. An open standard for connecting AI assistants to external data sources and tools through a structured server interface. Lets a website publish endpoints that AI agents can query without browser scraping.
- llms.txtA plain-text file at the root of a domain (/llms.txt) that describes the site's purpose, key pages, and entity definitions for AI crawlers. The AI equivalent of robots.txt, early adoption signals organizational maturity to crawlers.
- Agentic BrowsingBrowsing performed by an AI agent on behalf of a user. Differs from traditional crawling in that the agent reasons about task completion (booking a call, comparing options) and may execute multi-step interactions. Lighthouse now scores sites on agentic-browsing readiness.
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