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402utils Tech Stack Detector
x402
402utils Tech Stack Detector is a paid API for AI agents from 402utils.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-15).
Detects a website's technology stack — frameworks, CMS, e-commerce platforms, analytics, CDN, web server, and more — from HTTP headers, cookies, meta tags, and HTML markers using public signature fingerprints.
Price / call$0.004
Success—
StatusUnknown
How this service works
Detect a website's tech stack — frameworks, CMS, e-commerce, analytics, tag managers, CDN, web server, language — from response headers, cookies, <meta generator> and HTML/script markers. HEURISTIC, signature-based on PUBLIC fingerprints (NOT the licensed Wappalyzer database): strong on popular tech, conservative elsewhere; not-listed ≠ absent. Each hit carries a confidence and the matched evidence. The URL is SSRF-checked; the fetch is capped.
Output
Returns a JSON object with the requested URL, final URL after redirects, and an array of detected technologies each containing: name (e.g. 'Next.js'), category (e.g. 'framework'), confidence level ('high'/'medium'/'low'), evidence string showing what matched (e.g. 'html:__NEXT_DATA__', 'header:server=cloudflare'), and optionally a best-effort version. Includes a disclaimer note about heuristic/public-signature scope.
Example use cases
Competitive tech stack intelligence
“I'm researching our top 5 competitors' websites. Can you scan each one and tell me what frameworks, e-commerce platforms, and CDNs they're using so we can understand their tech choices?”
Security audit technology discovery
“We're doing a security assessment on a client's website. Can you identify all the frameworks, web servers, analytics tools, and third-party services running on their domain so we know what to focus on?”
Pre-sales website tech validation
“Before we pitch our service to this prospect, can you check out their website and let me know what CMS, e-commerce platform, and tag managers they're currently using?”
Technical details
Endpoint
GEThttps://402utils.com/v1/tech-detectWhen to prefer
Use this endpoint when you need quick, heuristic technology fingerprinting of a public website without requiring access to the licensed Wappalyzer database. It is best for popular, well-known technology stacks where public fingerprints are strong. Prefer it for competitive research, pre-sales intelligence, security assessments, or automated site audits where a per-call micropayment model fits the workflow.
Side effects
- URL fails SSRF safety check (private/internal IP ranges blocked)
- Target site is unreachable or returns error status
- Fetch times out due to cap on response size or latency
- No technologies detected (not-listed does not mean absent)
- Payment not received or insufficient USDC balance
- Invalid or malformed URL provided
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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