# isvisible.ai

> Free tool that checks whether a website is visible to AI crawlers and answer engines.

isvisible.ai reads a site's robots.txt and llms.txt, then sends live requests using the
real user-agent strings of GPTBot, ClaudeBot, PerplexityBot, Google-Extended, and other
AI crawlers. It combines declared rules with observed access into a 0-100 visibility
score and an agent-by-agent access map.

## Docs

- [Home](https://isvisible.ai/): Run a free scan and view a sample report.

## API

- [Check a site](https://isvisible.ai/api/is-visible): POST `{"url": "example.com"}`
  with header `Content-Type: application/json`, get back a JSON visibility report.
  No API key or auth is required for normal use. Rate limit: 20 requests per 60
  seconds per client IP; a limit hit returns HTTP 429 with a `Retry-After` header.
  Malformed input or an unreachable/invalid domain returns HTTP 400 with
  `{"error": "<message>"}`. A successful call returns HTTP 200 with:

  ```json
  {
    "url": "example.com",
    "robotsTxt": { "found": false, "url": "https://example.com/robots.txt" },
    "llmsTxt": { "found": false, "url": "https://example.com/llms.txt" },
    "liveProbe": { "performed": true, "baselineStatus": 200 },
    "userAgents": {
      "gptbot": { "allowed": true, "robotsAllowed": true, "probe": { "verdict": "allowed", "status": 200 }, "label": "OpenAI GPTBot (training)", "category": "ai-training" }
    },
    "score": 80,
    "grade": "B",
    "breakdown": { "aiAgentsAllowed": 13, "aiAgentsTotal": 13, "aiAgentsPoints": 80, "aiAgentsMaxPoints": 80, "llmsTxtPoints": 0, "llmsTxtMaxPoints": 20, "unverified": false },
    "issuedAt": 1784029699,
    "expiresAt": 1784033299,
    "expiresIn": 3600
  }
  ```

  `userAgents` includes one entry per tracked crawler (GPTBot, ClaudeBot,
  PerplexityBot, Google-Extended, Bingbot, and others). Results are cached per
  domain for about an hour, reflected in `issuedAt`/`expiresAt`/`expiresIn`.

- [MCP server](https://isvisible.ai/api/mcp): the same check exposed as an
  [MCP](https://modelcontextprotocol.io) tool for AI assistants (Claude, ChatGPT,
  Cursor, etc). Streamable HTTP transport only, same rate limit as the REST
  endpoint above. Add it to an MCP client:

  ```json
  { "mcpServers": { "isvisible": { "url": "https://isvisible.ai/api/mcp" } } }
  ```

  One tool, `check_ai_visibility`, taking `{"domain": "example.com"}` and
  returning the same score/grade/`userAgents` map as `POST /api/is-visible`,
  both as a short text summary and as structured tool output.