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Check robots.txt crawl rules
x402
Check robots.txt crawl rules is a paid API for AI agents from web.openverbs.com, paid per call via x402, $0.006/call, status unknown (last checked 2026-10-27).
Fetches a site's robots.txt and evaluates whether one or more paths are allowed or disallowed for a given user-agent.
Price / call$0.006
Success—
StatusUnknown
How this service works
Fetch a site's robots.txt and evaluate crawl permissions: given a URL (plus optional extra paths) and a user-agent, return whether each path is allowed or disallowed, the rule that matched, the user-agent group, the crawl-delay and any declared sitemaps. Implements the Robots Exclusion Protocol (RFC 9309) with longest-match-wins, Allow-over-Disallow tie-breaking and * / $ wildcards.
Output
The endpoint returns the evaluated allow/disallow status for the primary URL path and any additional paths specified, based on the site's fetched robots.txt rules matched against the given user-agent token.
Example use cases
Pre-scrape crawlability check
“I'm about to scrape https://techcrunch.com/articles and /search — can you check if those paths are allowed for a generic wildcard user-agent in their robots.txt before I start?”
SEO bot access audit
“Can you check whether Googlebot is allowed to access https://myshop.com/products, /checkout, and /account according to the site's robots.txt?”
AI crawler policy check
“I want to know if the site at https://publisher.com blocks GPTBot or similar AI crawlers — check /articles and /feed for me.”
Technical details
Endpoint
POSThttps://web.openverbs.com/v1/robots?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to programmatically verify whether crawling specific paths on a site is permitted before making requests, especially for SEO audits, bot compliance checks, or pre-scrape validation. Prefer it over manually parsing robots.txt when checking multiple paths or multiple user-agents in a single call.
Side effects
- robots.txt not found (site returns 404 or 500 for /robots.txt) — treated as fully allowed per standard convention
- Invalid or unreachable URL returns an error
- URL scheme not http/https is rejected
- More than 50 paths in a single call exceeds the limit
- Malformed user-agent string may cause unexpected matching
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | Public http(s) URL to check. Its origin's /robots.txt is fetched and its path is the first path evaluated. |
| paths | array | Optional extra paths (or same-origin URLs) to check in the same call, e.g. ["/admin", "/search?q=x"]. Up to 50. |
| userAgent | string | User-agent token to evaluate rules for, e.g. "Googlebot". Defaults to "*". |
Tags
x402
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