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FastX402 Site Recon
x402
FastX402 Site Recon is a paid API for AI agents from fastx402.tools, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-18).
Performs a comprehensive reconnaissance of a public URL or domain, returning DNS records, TLS certificate info, HTTP response details, security headers, page metadata, and detected technologies.
Price / call$0.004
Success—
StatusUnknown
How this service works
200 pay-per-call tools for AI agents, from $0.001 per request in USDC on Base or Solana with x402. No account, no API key.
Output
Returns a JSON object with: DNS records (A, AAAA, MX, NS, TXT), TLS certificate details (issuer, subject, validity dates, days remaining, protocol, SANs), HTTP response info (status code, final URL, redirect chain, response time, security headers present/missing), page metadata (title, meta description, OG tags, language, canonical URL), detected technologies (name, category, evidence), and domain registration info (registrar, created/expiry dates, status).
Example use cases
Security audit before vendor onboarding
“Before we sign this vendor contract, can you check their site at acmecorp.io — I want to know if they have HTTPS set up properly, which security headers are missing, and when their TLS certificate expires?”
Tech stack discovery for a competitor
“I want to know what technology stack our competitor at shopify.com is running — check what framework, CDN, and hosting they use based on their site headers and markup.”
Domain health check for expiry monitoring
“Can you run a recon on mybrand.com and tell me when the domain expires, who the registrar is, and whether the TLS certificate is still valid with more than 30 days left?”
Technical details
Endpoint
GEThttps://fastx402.tools/site-recon?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, single-call snapshot of a domain's technical profile — combining DNS, TLS, HTTP, security headers, page content, and tech stack detection in one response. It is more efficient than calling separate DNS lookup, SSL checker, and technology detection tools individually. Ideal for security auditing, vendor due diligence, competitor intelligence, or pre-deployment checks. Costs $0.004 USDC with no API key or account required.
Side effects
- Invalid or non-public URL returns an error in the relevant field (e.g. dns.error, tls.error)
- Private or localhost URLs are rejected
- Slow-responding sites may result in truncated HTTP content
- Domain not found results in DNS error fields being populated
- Payment failure (insufficient USDC balance) prevents request from being processed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"dns": {
"a": [
"64.239.109.129",
"64.239.109.65"
],
"mx": [
{
"exchange": "aspmx.l.google.com",
"priority": 1
}
],
"ns": [
"ns1.vercel-dns.com",
"ns2.vercel-dns.com"
],
"txt": [
"MS=ms81951275"
],
"aaaa": [],
"error": null
},
"tls": {
"san": [
"*.vercel.com",
"vercel.com"
],
"error": null,
"issuer": "Let's Encrypt, YR1",
"subject": "*.vercel.com",
"validTo": "Dec 24 12:18:21 2026 GMT",
"daysLeft": 68,
"protocol": "TLSv1.3",
"validFrom": "Sep 25 12:18:22 2026 GMT",
"authorized": true,
"authorizationError": null
},
"url": "https://vercel.com/",
"http": {
"status": 200,
"finalUrl": "https://vercel.com/",
"truncated": false,
"durationMs": 228,
"redirectChain": [],
"securityHeaders": {
"missing": [
"permissions-policy"
],
"present": [
"strict-transport-security",
"content-security-policy",
"x-frame-options",
"x-content-type-options",
"referrer-policy"
]
}
},
"page": {
"lang": "en",
"title": "Agentic Infrastructure - Vercel",
"ogImage": "https://lishhsx6kmthaacj.public.blob.vercel-storage.com/og-home-not-x.png",
"ogTitle": "Agentic Infrastructure - Vercel",
"canonical": "https://vercel.com",
"visibleText": "Agentic Infrastructure - Vercel Skip to content ...",
"ogDescription": "The autonomous stack for every app and agent.",
"metaDescription": "The autonomous stack for every app and agent."
},
"tech": [
{
"name": "Vercel",
"category": "Hosting / CDN",
"evidence": "x-vercel-id header"
},
{
"name": "Next.js",
"category": "Framework",
"evidence": "Found Next.js markers /_next/static/ or __NEXT_DATA__"
},
{
"name": "React",
"category": "JavaScript Library",
"evidence": "React DOM markers in HTML"
}
],
"domain": {
"error": null,
"status": [
"client transfer prohibited"
],
"created": "1999-10-04T19:30:47Z",
"expires": "2029-10-04T19:30:47Z",
"registrar": "Amazon Registrar, Inc.",
"daysUntilExpiry": 1084
},
"checkedAt": "2026-10-17T16:07:20.375Z",
"durationMs": 228
}
}Tags
x402
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