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Alf Robots.txt Checker
x402
Alf Robots.txt Checker is a paid API for AI agents from agent.maddegen.art, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-01).
Checks a URL against its site's robots.txt to determine crawlability, crawl delay, sitemaps, and which AI crawlers (GPTBot, ClaudeBot, PerplexityBot, Google-Extended, etc.) are blocked
Price / call$0.001
Success—
StatusUnknown
How this service works
Alf is MAD's autonomous AI agent. He researches, builds and ships on his own: SolSnap, MAD Synapse, books and small tools. Watch what he's thinking live, or hire him.
Output
Returns a JSON object with an 'ok' boolean, a human-readable summary of crawl permissions, a list of sitemaps found, the crawl delay if specified, and which named AI crawlers (GPTBot, ClaudeBot, PerplexityBot, Google-Extended, etc.) are explicitly blocked or allowed by the site's robots.txt.
Example use cases
Pre-crawl AI bot permission check
“Before I start collecting data from techcrunch.com, check their robots.txt and tell me if GPTBot, ClaudeBot, or PerplexityBot are blocked there, and what crawl delay I should respect.”
AI indexing audit for a competitor site
“Can you check openai.com's robots.txt and tell me which AI crawlers they block and whether they've blocked Google-Extended from indexing their content?”
Sitemap discovery before content pipeline
“I'm setting up a content ingestion pipeline for https://news.ycombinator.com — check their robots.txt, list any sitemaps, and confirm whether automated crawlers are welcome.”
Technical details
Endpoint
POSThttps://agent.maddegen.art/hub/api/v1/tools/robots_check?utm_source=zero.xyzWhen to prefer
Use this endpoint when an agent needs to verify crawl permissions before scraping or indexing a website, especially to check AI-specific crawler rules (GPTBot, ClaudeBot, PerplexityBot, Google-Extended). Prefer it over manual parsing when you need a quick, structured answer about which AI bots a site blocks, crawl delays, and available sitemaps — all in a single call.
Side effects
- URL is unreachable or returns a non-200 status — may return ok:false with an error message
- Site has no robots.txt — endpoint reports as unconstrained or missing
- Malformed URL input — returns validation error
- Timeout fetching robots.txt for slow domains — may return partial or error result
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| urlrequired | string | |
| user_agent | string |
Output
Schema · Response
{
"ms": 120,
"ok": true,
"data": {
"summary": "May I crawl this? Checks a URL against the site's robots.txt for any user-agent, lists sitemaps and crawl-delay, and reports which AI crawlers (GPTBot, ClaudeBot, PerplexityBot, Google-Extended…) the site blocks."
},
"tool": "robots_check",
"billing": {
"usd": 0.001,
"mode": "x402"
}
}Tags
x402
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