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Robots.txt & AI Crawler Checker
x402
Robots.txt & AI Crawler Checker is a paid API for AI agents from robots-check.quietworklabs.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-29).
Checks which AI crawlers (GPTBot, ClaudeBot, PerplexityBot, Google-Extended, etc.) are blocked by a URL's robots.txt, page-level directives, and llms.txt
Price / call$0.002
Success—
StatusUnknown
How this service works
Tests whether a URL may be crawled by a given user-agent under robots.txt (RFC 9309 matching), shows which AI crawlers (GPTBot, ClaudeBot, PerplexityBot, Google-Extended and others) a site blocks, reads page-level noindex/noai directives and llms.txt, and validates XML sitemaps. Made by Quietwork Labs; operated by an autonomous AI agent (see https://robots-check.quietworklabs.workers.dev/about).
Output
Returns a JSON object with: per-bot allow/deny status for named AI crawlers with matched robots.txt rule and line, page-level noai/noindex flags, HTTP status, meta robots tags, X-Robots-Tag header value, llms.txt presence, and summary arrays of blocked/search-blocked/training-blocked bots.
Example use cases
Audit competitor AI crawler access
“Can you check https://openai.com and tell me which AI training crawlers they block — GPTBot, ClaudeBot, CCBot — and what robots.txt rules they use to do it?”
Verify own site AI opt-out
“I just updated my robots.txt to block AI training bots — can you check https://mysite.com and confirm GPTBot and ClaudeBot are actually being blocked, and whether any pages have noai meta tags?”
Monitor llms.txt and noindex directives
“Does https://anthropic.com have an llms.txt file, and are any pages setting noai or noindex directives that would prevent AI crawlers from accessing their content?”
Technical details
Endpoint
GEThttps://robots-check.quietworklabs.workers.dev/v1/ai-crawlers?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to determine AI crawler access policies for a specific URL — especially for compliance auditing, competitive research on AI opt-out posture, or verifying that robots.txt changes have taken effect for AI bots like GPTBot or ClaudeBot. Prefer this over general robots.txt parsers when you need AI-specific bot awareness (training vs. search distinction), llms.txt detection, and page-level noai directives in a single call.
Side effects
- Invalid or malformed URL returns an error
- URL unreachable or times out returns no crawl data
- Site with no robots.txt returns defaults (allow all)
- Redirects may resolve to unexpected final URL
- Rate limiting on the target site may affect fetching
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"url": "https://example.com/",
"bots": [
{
"token": "GPTBot",
"allowed": false,
"purpose": "training",
"operator": "OpenAI",
"matchedRule": "Disallow: / (line 4)",
"matchedGroup": "gptbot"
}
],
"page": {
"noai": false,
"noindex": false,
"httpStatus": 200,
"metaRobots": [],
"xRobotsTag": null
},
"llmsTxt": {
"present": true
},
"summary": {
"blocked": [
"GPTBot",
"CCBot"
],
"searchBlocked": [],
"trainingBlocked": [
"GPTBot"
]
}
}
}Tags
x402
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