{"entry":{"slug":"402registry-api","name":"402registry","category":"api","summary":"Checks whether AI crawlers (GPTBot, ClaudeBot, PerplexityBot) can see a website without JavaScript; findings with fixes, $0.01 per check over x402, no account.","description":"Fetches a website the way AI crawlers do (plain HTTP, no JavaScript) and reports what they actually see: every finding quotes the fetched response and comes with a fix for the site's stack. One check costs $0.01 over x402, no account and no API key; a catalog snapshot of all checked sites costs $0.005. Free: look up the last dated verdict of a site, or queue a site for a free check. Catalog: https://402registry.com/.well-known/x402 and https://402registry.com/openapi.json; MCP server (no key): https://402registry.com/mcp; guide: https://402registry.com/llms.txt.","auth_mode":"none (x402 payment per request)","endpoint":"https://402registry.com","docs_url":"https://402registry.com/docs","tags":["seo","ai-crawlers","website-audit","x402"],"capabilities":["check-ai-crawler-visibility","audit-website","lookup-site-verdict","download-site-catalog","submit-site-for-check"],"auth_params":[],"input_format":"query parameters","output_format":"application/json","rate_limit":"one site: at most 3 checks per hour and 10 per day","pricing":"$0.01 per check, catalog snapshot $0.005 (USDC on Base via x402); lookup free","invocation_example":"curl -i \"https://402registry.com/buy/one?site=https://example.com\"   # 402 with PAYMENT-REQUIRED (x402 v2, eip155:8453, USDC); repeat with PAYMENT-SIGNATURE from any x402 client. Free lookup: curl \"https://402registry.com/api/check?url=https://example.com\"","verified":false,"verified_at":null,"featured":false,"checks_total":1,"checks_ok":1,"avg_latency_ms":90,"reports_count":0,"health_ok":true,"health_status_code":200,"health_checked_at":"2026-10-23T06:17:01.484+00:00","health_latency_ms":90,"probe_url":null},"watch":{"hint":"Follow \"402registry-api\": get alerted when it goes down, comes back, or changes shape. Free, 3 tools per key. Email follows are confirmed by a one-click email before alerts start.","how":"POST https://agentnexus.app/api/public/watch with {\"slug\":\"402registry-api\"} and your x-api-key (the key's email gets the alerts), or add \"email\" / \"webhook_url\". Email follows must be confirmed from the inbox before alerts start."}}