Is your site ready for agents?

The litmus test for the agent web.

Agents are becoming the web's biggest readers. Find out what they see when they visit you.

See what agents see

Every scan produces a report like this — a letter grade, a signal-by-signal breakdown, and an Adversarial Safety check.

Sample report — not a live scan

example-shop.com

Sample scan

78/100

Signal breakdown

Tap a row to see how to fix it.

Adversarial Safety

Clean

Checks for hidden text and prompt-injection payloads that could hijack an AI agent reading this site.

No hidden text or injection patterns detected.

How it works

1

Scan

Enter your URL. AgentLitmusBot fetches your homepage, llms.txt, robots.txt, and more — just like an AI agent would.

2

See your grade & fixes

Get a letter grade, a signal-by-signal breakdown, and a prioritized list of the highest-impact fixes.

3

Generate the files to improve

Create llms.txt, robots.txt, and AGENTS.md tailored to your site, then re-scan to confirm your grade went up.

What we check, in plain English

AgentLitmus scores 10 signals across three areas, for 100 points total — plus a separate Adversarial Safety check.

Guides for agents

Files and structure that help an AI agent understand your site without guessing.

  • llms.txt12 pts

    Checks for a /llms.txt file: a plain-text guide that points AI agents to your most important pages. Awards points for the file existing, having a title and markdown links, and those links pointing to your own domain.

  • Renders Without JS12 pts

    Checks how much real content is in the raw HTML response, before any JavaScript runs. Awards points for visible text length, a healthy text-to-HTML ratio, and signs of server-side rendering.

  • Semantic HTML10 pts

    Examines your homepage's HTML structure: a single <h1>, headings that don't skip levels, landmark elements like main/nav/header/footer, and semantic lists or tables instead of div-only layouts.

  • AGENTS.md10 pts

    Checks for an /AGENTS.md file describing how AI coding agents should work with your project. Awards points for the file existing and being organized with at least two markdown headings.

44 points total

Machine-readable content

Structured data and APIs that let agents read your content directly, not just your pages.

  • Structured Data (JSON-LD)14 pts

    Looks for JSON-LD <script> tags on your homepage. Awards points for the tags being present, parsing as valid JSON, and declaring a recognized schema.org @type like Organization, Product, Article, or WebSite.

  • Machine-Readable Endpoint10 pts

    Looks for a machine-readable API surface: a /.well-known/mcp.json manifest (strongest), an /openapi.json spec, or a visible link to API docs on the homepage. The best one found counts, not the sum.

24 points total

Access & trust

Signals that tell agents whether they're welcome, and how current your content is.

  • Agent Access Policy10 pts

    Reads your /robots.txt to see whether it exists, whether it blanket-blocks all crawlers, and whether it explicitly addresses known AI agent user-agents like GPTBot, ClaudeBot, or Google-Extended.

  • Content Freshness8 pts

    Checks whether your sitemap.xml has <lastmod> dates and whether your homepage shows a parseable date (modified time, <time> element, or visible date) within the last 12 months.

  • Sitemap URL Quality8 pts

    Checks that /sitemap.xml exists and parses, then samples up to 20 URLs to see whether they use descriptive, readable words rather than opaque IDs or hashes.

  • Image Alt Text6 pts

    Samples up to 30 <img> elements on your homepage and checks how many have non-empty alt text, so agents (and screen readers) understand what images convey.

32 points total

Adversarial Safety

Is your site safe for agents to read?

A separate score that checks for hidden text, concealed links and form targets, and prompt-injection payloads in your llms.txt or AGENTS.md — content designed to manipulate an AI agent rather than inform it. This doesn't affect your letter grade, but it's shown on every report.

New to this? Read the agent-readiness guide for practical examples of each fix.

Page last updated .

  • Checks 10 agent-readiness signals across guides, machine-readable content, and access & trust
  • Generates llms.txt, robots.txt & AGENTS.md tailored to your site
  • Monitors your site on a schedule and alerts you when your grade drops

Find out what agents see when they visit your site.

It takes one scan — no signup required to get your grade.

Scan my site

Not sure where to start? See how different teams use AgentLitmus.

AgentLitmus — Is your site ready for agents?