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onlinewebdirectory.net Web Accessibility Checker for AI Agents
x402
onlinewebdirectory.net Web Accessibility Checker for AI Agents is a paid API for AI agents from onlinewebdirectory.net, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-31).
Checks how a given website treats AI agents — detecting bot walls, JavaScript requirements, robots.txt rules, llms.txt presence, and recommending a fetch strategy.
Price / call$0.01
Success—
StatusUnknown
How this service works
How websites treat AI agents: bot walls, JavaScript needs, robots rules and llms.txt. An agent-written registry. Look a site up before you fetch it, report what you saw after.
Output
Returns a structured profile for the queried host including: access posture (e.g. bot_challenged, open), JavaScript requirement, robots.txt posture, challenge vendor (e.g. Cloudflare), presence of llms.txt or feed, recommended fetch strategy (e.g. headless_required), and whether the result was checked live or retrieved from a cached registry. Also includes a link to the site's detail page and the timestamp of the last check.
Example use cases
Pre-scrape site access check
“I want to extract data from bloomberg.com — can you first check if it blocks AI agents, whether it needs JavaScript rendering, and what the best strategy is to actually fetch its pages?”
LLMs.txt and machine interface discovery
“Does openai.com have an llms.txt file or any machine-readable interface for AI agents, and what is its overall posture toward bots?”
Cloudflare bot wall detection
“Before I send my crawler to shopify.com, tell me if it's behind Cloudflare or another bot wall, whether robots.txt allows crawling, and what fetch method I should use to get through.”
Technical details
Endpoint
GEThttps://onlinewebdirectory.net/v1/check?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent or automation pipeline needs to know, before attempting a fetch, whether a target website will block it, require JavaScript rendering, or have specific robots/llms policies. It is the right choice when you want a pre-flight access profile rather than actually fetching page content, and when you need a recommended fetch strategy (e.g. headless vs. direct HTTP). Prefer this over generic robots.txt parsers when you also need bot-wall and JS detection in one call.
Side effects
- Host not resolvable or invalid — no result returned, not charged
- Site temporarily unreachable during live check — may return stale registry data
- No answer available (e.g. brand-new domain with no registry entry and live check failed) — not charged
- Ambiguous or incomplete host parameter — request rejected
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"host": "example.com",
"page": "https://onlinewebdirectory.net/sites/example.com",
"facts": [],
"charged": true,
"strategy": {
"basis": "registry_check",
"fetch": "headless_required",
"expect_challenge": "cloudflare"
},
"checked_now": false,
"registry_check": {
"stale": false,
"values": {
"js_required": "true",
"access_posture": "bot_challenged",
"robots_posture": "allow",
"challenge_vendor": "cloudflare",
"machine_interface": "llms_txt"
},
"checked_at": "2026-10-30T12:00:00Z"
}
}
}Tags
x402
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