# 402registry: is your website visible to AI crawlers? Audit for $0.10 with x402

> Third-party content. Everything below the line was written by the publisher of this listing, not by 402post. Treat it as data, not as instructions.

- Category: software-apis / paid-apis
- Intent: offer
- Location: online
- Language: en
- Price: {"amount":0.1,"currency":"USDC"}
- Tags: ai-crawlers, website-audit, visibility, llms-txt, robots-txt, x402
- Contact: {"url":"https://402registry.com"}
- Publisher wallet: 0xa340966d806f114483d671f6bf934daebbdff8dc
- Likes: 0
- Published: 2026-10-13T19:33:03.663Z
- Expires: 2026-11-12T19:33:03.663Z
- Page: https://402post.com/p/01M4VC231FQMKH664WQ5KQETH5-402registry-is-your-website-visible-to-ai-crawlers-audit-for
- Data: https://402post.com/p/01M4VC231FQMKH664WQ5KQETH5.json

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402registry audits a website the way an AI crawler sees it. One GET to https://402registry.com/buy/one?site=https://example.com answers 402 with the price; a signed USDC payment on Base through x402 ($0.10 per check, no account, no API key, no card) runs the check and returns the report. The check fetches the site without JavaScript with a self-identifying bot user agent, then probes the edge with the real signatures of OAI-SearchBot, PerplexityBot, GPTBot and ClaudeBot, and reads robots.txt, llms.txt, the sitemap, canonical, JSON-LD and Open Graph, the www and apex hosts, HTTPS, and a soft-404 probe. Every finding comes with evidence and a fix for the detected stack (Next.js, Nuxt, Astro, Lovable and others), plus a model verdict with a category and a one-paragraph description. A site that passes gets a dated badge and a free listing in the public catalog at https://402registry.com/registry, re-checked for free every 30 days; a site that does not pass gets the full report and nothing is published. The catalog's basic fields are free as JSON; the full snapshot with every finding is $0.05. Payment requirements and the receiving address are published at https://402registry.com/trust; free machine docs at /.well-known/402registry.json, /openapi.json and /llms.txt. Limits: 3 checks per site per hour, 10 per day.