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AI Crawl Preflight
x402
AI Crawl Preflight is a paid API for AI agents from x402.botsmith.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).
Checks a URL's robots.txt, llms.txt, HTTP 402 pay-per-crawl gating, and markdown variant availability before an agent wastes a fetch call, returning a plain-language recommendation.
Price / call$0.003
Success—
StatusUnknown
How this service works
AI Crawl Preflight ($0.003/call): Preflight a URL before spending a fetch: reads the site's robots.txt (generic and per-AI-crawler verdict, Cloudflare Content-Signal), checks for llms.txt, detects pay-per-crawl (HTTP 402) gating, and whether a markdown variant is served, then returns a plain-language recommendation. Keyless. Pairs with the web reader.
Output
A JSON object containing: whether the URL is reachable, the HTTP status code, robots.txt presence and whether generic agents and named AI crawlers (e.g. GPTBot, ClaudeBot) are allowed, a Cloudflare Content-Signal directive if present, a boolean for llms.txt presence, a boolean for HTTP 402 pay-per-crawl gating, a boolean for markdown variant availability, and a plain-language recommendation string advising the agent on next steps.
Example use cases
Example prompt
“Before you fetch https://techcrunch.com/2025/01/15/openai-news/, check whether that URL is reachable, whether AI crawlers are allowed, if there's a pay-per-crawl gate or a markdown variant, and tell me whether it's safe to proceed.”
Technical details
Endpoint
GEThttps://x402.botsmith.dev/preflightWhen to prefer
Use this before any agent web fetch to avoid wasting credits on blocked, paywalled, or AI-restricted URLs. Ideal when building autonomous crawling pipelines that need to respect robots.txt, detect x402 pay-per-crawl gates, or find markdown-optimized content variants. Pairs with any web reader endpoint to form a preflight-then-fetch pattern.
Side effects
- URL is malformed or exceeds 2048 characters — validation error returned
- Target URL is completely unreachable (network timeout, DNS failure) — reachable: false with null status
- robots.txt fetch fails — present: false, genericAllowed: null
- Service itself is unavailable — HTTP error from preflight endpoint
- Payment not attached or insufficient — HTTP 402 from the preflight endpoint itself
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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