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AI Crawler Access Check
x402
AI Crawler Access Check is a paid API for AI agents from api.aiskills402.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-14).
Returns a SKILL.md file describing how to interpret AI-crawler probe results — classifying which bot categories are blocked, allowed, or mixed on a given website.
Price / call$0.05
Success—
StatusUnknown
How this service works
AI Crawler Access Check: Who Gets a 403 — Reads the results of probing a website with AI-crawler user agents (status codes per bot, a control request, sometimes robots.txt or the site's settings) and says what they really show as JSON - whether training bots, search bots and user-triggered agents are open, blocked, mixed or unknown, what is behind a refusal, and whether the robots.txt that answered is the site's own file. Knows the traps - a bare bot name proves nothing and lies differently for…
Output
Returns a SKILL.md markdown file (with UTF-8 encoding and SHA256 hash) that explains how to interpret AI-crawler probe results — classifying bot categories as open, blocked, mixed, or unknown, explaining what drives refusals, and flagging whether the responding robots.txt is authentic. Also includes a purchase receipt with a blockchain settlement transaction and a redownload URL with token.
Example use cases
Audit site openness to AI training bots
“I ran a crawler probe on a site and got mixed status codes back — can you pull the skill file that explains what those results mean and whether training bots like GPTBot or CCBot are really being blocked or just selectively allowed?”
Verify robots.txt authenticity for a domain
“I need to know if the robots.txt that answered my crawler probe is actually the site's own file or something else — get me the guide that explains how to detect that and what it means for bot access.”
Understand refusal reasons for AI user agents
“A site is returning 403s for some AI crawlers but not others, and I can't tell what's behind the refusal — can you fetch the skill document that breaks down what different block patterns actually indicate for training bots versus user-triggered agents?”
Technical details
Endpoint
GEThttps://api.aiskills402.com/v1/skills/crawler-access-probe/file?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an agent needs authoritative, interpretive guidance on AI-crawler HTTP probe results — specifically to classify bot category access (training, search, user-triggered) and understand the semantics behind 403 responses and robots.txt authenticity. Prefer this over raw HTTP probing tools when you need curated, expert-authored interpretation logic packaged as a reusable skill file rather than raw status codes.
Side effects
- Payment not settled — 402 response if USDC payment on Base is not confirmed
- Invalid method — only GET or HEAD accepted; other methods return error
- File unavailable — if SKILL.md cannot be retrieved, ok field will be false
- Network timeout — slow response if upstream settlement is delayed
- Invalid input schema — missing required 'type' or 'method' fields returns validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"file": {
"name": "SKILL.md",
"content": "<the SKILL.md file>",
"encoding": "utf-8"
},
"name": "AI Crawler Access Check: Who Gets a 403",
"skill": "crawler-access-probe",
"sha256": "<sha256 of SKILL.md>",
"receipt": {
"tx": "0x<settlement transaction>",
"settled": true
},
"version": "1.0.0",
"redownload": {
"url": "<api>/v1/purchases/<token>",
"token": "<64 hex chars>"
}
}
}Tags
x402
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