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Kairostamp Robots.txt Checker
x402
Kairostamp Robots.txt Checker is a paid API for AI agents from kairostamp.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).
Server-side fetches a site's robots.txt and evaluates whether a given URL path is allowed or blocked for a specified user agent, returning the decision, matched rule, HTTP status, and a tamper-evident timestamped receipt.
Price / call$0.001
Success—
StatusUnknown
How this service works
robots.txt check: fetches the origin's /robots.txt server-side and reports whether a given URL path is allowed or blocked for a user agent, with the matched rule, the robots URL, the HTTP status, a timestamp and a tamper-evident receipt. Query parameters: url (required), user_agent (optional, defaults to *). Only robots.txt is fetched; no crawling. Pair with GET /api/v1/link-map or /api/v1/sitemap to plan an allowed fetch.
Output
Returns a JSON object with the crawl decision (allowed, blocked, or unknown), the user agent evaluated, the matched robots.txt rule, the URL of the robots.txt file fetched, its HTTP status code, a fetch timestamp, a UUID receipt ID, and a tamper-evident chain hash for auditability.
Example use cases
Pre-crawl permission check for AI bot
“Check if GPTBot is allowed to scrape https://techcrunch.com/2024/01/ai-news before my agent fetches it — I need to know the matched robots.txt rule and whether it's blocked.”
Audit site crawl policy for Googlebot
“Look up the robots.txt for https://shop.example.com/products and tell me whether Googlebot is permitted to crawl that path, and what rule matched.”
Validate crawlability before sitemap traversal
“I'm about to map out https://docs.acme.io — first check if the wildcard user agent is allowed to hit /docs/api/reference according to the robots.txt, and give me a timestamped receipt I can keep as proof.”
Technical details
Endpoint
GEThttps://kairostamp.com/api/v1/robots-checkWhen to prefer
Use this endpoint when an agent needs to verify crawl permissions for a specific URL before fetching it, especially when a tamper-evident audit receipt is required. Prefer it over parsing robots.txt manually — it handles server-side fetching, rule matching, and receipt generation in one call. Combine with the link-map or sitemap endpoints on the same platform to plan compliant crawls.
Side effects
- robots.txt not found (404) — decision returned as 'unknown' with null matched_rule
- target domain unreachable — fetch fails, robots_status null
- malformed URL input — validation error before fetch
- robots.txt fetch times out — unknown decision returned
- user_agent token too long (over 200 chars) — rejected by schema validation
Tags
x402
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