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SiteCheck Robots.txt Checker
x402
SiteCheck Robots.txt Checker is a paid API for AI agents from api.sitecheck-api.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-16).
Fetches and parses a site's robots.txt file to determine which crawlers are allowed or blocked from accessing a given URL path
Price / call$0.001
Success—
StatusUnknown
How this service works
Checks whether a URL's path may be crawled under robots.txt (RFC 9309): the verdict for a user agent (default: *, Googlebot, Bingbot, GPTBot, ClaudeBot, PerplexityBot, Google-Extended and CCBot), the rule that decided it and its line, crawl-delay, sitemaps and the matching group's lines. Longest rule wins, allow wins a tie, * and $ work. No robots.txt means everything is allowed; a server error is a 503, not charged.
Output
Returns the parsed robots.txt evaluation for the given URL, including: whether each crawler (default: common crawlers like Googlebot, Bingbot, Yandex, etc.) is allowed or disallowed, the specific matching rule and line number, the user-agent group it falls under, any crawl delay, discovered sitemap URLs, and a timestamp of when the check was performed.
Example use cases
SEO audit for blocked pages
“I'm auditing our site's SEO — can you check if Googlebot is allowed to crawl https://shop.mystore.com/checkout based on our robots.txt?”
Competitor crawl policy research
“I want to know whether Bingbot is blocked from accessing https://www.competitor.com/pricing — can you check their robots.txt?”
Scraping compliance check
“Before I scrape https://www.news-site.com/articles, can you check whether any common crawlers are allowed there and list any sitemaps their robots.txt mentions?”
Technical details
Endpoint
GEThttps://api.sitecheck-api.workers.dev/api/robots?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to programmatically verify crawl permissions for a specific URL and crawler combination, especially during SEO audits, before building web scrapers, or when checking competitor crawl policies. It parses robots.txt with RFC 9309-compliant longest-match rules, making it more accurate than naive text parsing.
Side effects
- robots.txt not found (404) — site may not have one, returns 200 with empty rules
- URL is malformed — validation error returned
- Site is unreachable or times out — network error
- Specified user agent doesn't match any group — falls back to wildcard rules
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"url": "https://www.google.com/search?q=x",
"note": null,
"path": "/search?q=x",
"origin": "https://www.google.com",
"source": "https://www.google.com/robots.txt, RFC 9309 matching (longest rule wins, allow wins a tie)",
"status": 200,
"results": [
{
"rule": {
"line": 3,
"type": "disallow",
"pattern": "/search"
},
"group": {
"lines": [
"User-agent: *",
"User-agent: Yandex",
"Disallow: /search"
],
"userAgent": "*"
},
"allowed": false,
"userAgent": "*",
"crawlDelay": null
},
{
"rule": {
"line": 3,
"type": "disallow",
"pattern": "/search"
},
"group": {
"lines": [
"User-agent: *",
"User-agent: Yandex",
"Disallow: /search"
],
"userAgent": "*"
},
"allowed": false,
"userAgent": "Googlebot",
"crawlDelay": null
},
{
"rule": {
"line": 3,
"type": "disallow",
"pattern": "/search"
},
"group": {
"lines": [
"User-agent: *",
"User-agent: Yandex",
"Disallow: /search"
],
"userAgent": "*"
},
"allowed": false,
"userAgent": "Bingbot",
"crawlDelay": null
}
],
"sitemaps": [
"https://www.google.com/sitemap.xml"
],
"checkedAt": "2026-10-15T14:07:52.191Z"
}
}Tags
x402
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