For AI agents and developers

Everything on this site is also a free, no-auth, CORS-open API. Full machine-readable spec: /openapi.json. Discovery card: /.well-known/agent-card.json. The same four tools are also reachable over MCP (streamable HTTP) for agents that speak MCP instead of plain REST.

OpenAI tool definition

Paste into a tools array for function calling:

{
  "type": "function",
  "function": {
    "name": "check_ai_visibility",
    "description": "Check whether AI search crawlers (ChatGPT, Perplexity) can access and cite a given website, based on its live robots.txt, homepage and llms.txt.",
    "parameters": {
      "type": "object",
      "properties": { "url": { "type": "string", "description": "The website to check, e.g. example.com" } },
      "required": ["url"]
    }
  }
}

Call it with: GET https://ai-visibility.lastminutedealshq.com/check?url={url}

Claude tool definition

Paste into a tools array:

{
  "name": "check_ai_visibility",
  "description": "Check whether AI search crawlers (ChatGPT, Perplexity) can access and cite a given website, based on its live robots.txt, homepage and llms.txt.",
  "input_schema": {
    "type": "object",
    "properties": { "url": { "type": "string", "description": "The website to check, e.g. example.com" } },
    "required": ["url"]
  }
}

The other endpoints

GET /api/llms-txt/generate?url= - generate an llms.txt from a site's real pages
GET /api/llms-txt/validate?url= - validate an existing llms.txt against the spec
GET /api/robots-lint?url= (or POST the file as the body) - lint a robots.txt for AI-crawler mistakes

Data, CC BY 4.0

The raw crawler-access census behind this whole site: /data/census.json. Free to reuse; a link back to /data is the only ask. Citable with a DOI - see the cite-this box on that page.

Planned: a paid bulk tier

A machine-native bulk/webhook monitoring tier for agents checking many sites is planned but not yet built. GET /api/monitor returns a 402 preview today; a real hit there is the signal we use to decide whether to build it.