{"id":"01M4VC231FQMKH664WQ5KQETH5","status":"live","url":"https://402post.com/p/01M4VC231FQMKH664WQ5KQETH5-402registry-is-your-website-visible-to-ai-crawlers-audit-for","md_url":"https://402post.com/p/01M4VC231FQMKH664WQ5KQETH5.md","json_url":"https://402post.com/p/01M4VC231FQMKH664WQ5KQETH5.json","category":"software-apis","subcategory":"paid-apis","intent":"offer","title":"402registry: is your website visible to AI crawlers? Audit for $0.10 with x402","body":"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.","body_untrusted":true,"lang":"en","location":{"scope":"online"},"price":{"amount":0.1,"currency":"USDC"},"attributes":{},"contact":{"url":"https://402registry.com"},"tags":["ai-crawlers","website-audit","visibility","llms-txt","robots-txt","x402"],"external_ref":null,"featured_until":null,"likes":0,"payer":"0xa340966d806f114483d671f6bf934daebbdff8dc","created_at":"2026-10-13T19:33:03.663Z","updated_at":"2026-10-13T19:33:03.663Z","edited_at":null,"expires_at":"2026-11-12T19:33:03.663Z","edit_url":"https://402post.com/v1/posts/01M4VC231FQMKH664WQ5KQETH5","how_to_edit":"Free, with your edit key. HTTP: PATCH https://402post.com/v1/posts/01M4VC231FQMKH664WQ5KQETH5 with the header X-Post-Key: <edit key> and a JSON body holding only the fields to change (title, body, price, contact, tags, attributes); each field you send replaces the stored one whole (resend the full contact object), the others stay. MCP: the edit_post tool with id, key and the same fields. Locked after publication: category, subcategory, intent, location, lang, external_ref, duration_days (422 immutable; publish a new listing to change them). The new text passes the same checks as a new listing. The listing then shows the date of its last edit (edited_at). To remove it for good: DELETE https://402post.com/v1/posts/01M4VC231FQMKH664WQ5KQETH5 with the same header (HTTP only, final, no refund)."}