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WebLens Tech Detection API
x402
WebLens Tech Detection API is a paid API for AI agents from api.weblens.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-02).
Detects technologies, frameworks, hosting providers, and other tech stack components used by a given URL
Price / call$0.005
Success—
StatusUnknown
How this service works
# WebLens - Web Intelligence API, pay per call Scrape, crawl, map and extract the web. No account, no API key, no monthly minimum — you pay for the calls you make and nothing else. ## Pricing Page fetching starts at **$0.002**, whole-site crawling at **$0.0015/page**, and sitemap discovery at **$0.004**. Comparable services bill $0.007-0.008 per request, or reach a lower per-page rate only on a $99/month commitment. WebLens has no commitment to reach. ## Payment Protocol All paid endpoints use the [x402 protocol](https://x402.org) for HTTP-native micropayments (USDC on Base). ## Cache Discount Cached responses are **70% cheaper** than fresh fetches.
Output
Returns a JSON object containing the detected technologies (each with name, category, and header/DOM evidence), a categorized map of technologies by type (e.g. hosting, framework), server and powered-by header values, final redirected URL, HTTP status code, and a request ID for tracing.
Example use cases
Competitor tech stack analysis
“What tech stack is my competitor at shopify.com running? I want to know their hosting, frontend framework, CMS, and any analytics tools they're using.”
Developer due diligence on acquisition target
“We're evaluating acquiring a startup at acme-startup.io — can you tell me what technologies their website is built on, including server, framework, and infrastructure clues?”
Sales lead enrichment by tech usage
“I'm targeting companies that use Salesforce on their website — can you check whether techcorp.com has Salesforce detected in their tech stack?”
Technical details
Endpoint
POSThttps://api.weblens.dev/tech?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to fingerprint the technology stack of a specific URL without setting up an account or committing to a monthly plan. It is ideal for per-call, pay-as-you-go tech detection where cost efficiency matters — at $0.005 per call (with 70% discount on cached results), it undercuts comparable services. Prefer it for competitive research, lead enrichment, or developer due diligence workflows where you need structured, categorized technology evidence including header-based fingerprints.
Side effects
- URL is unreachable or returns a non-2xx status — endpoint still returns status code but technology detection may be incomplete
- Site uses heavy client-side rendering that prevents server-side technology fingerprinting
- Redirect loops or very long redirect chains may affect finalUrl resolution
- Payment failure via x402 protocol if insufficient USDC balance
- Invalid or malformed URL input returns an error response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | Site URL to fingerprint |
Output
Schema · Response
{
"type": "json",
"example": {
"url": "https://vercel.com",
"server": "Vercel",
"status": 200,
"finalUrl": "https://vercel.com/",
"poweredBy": "Next.js, Payload",
"requestId": "req_tech123",
"categories": {
"hosting": [
"Vercel"
],
"framework": [
"Next.js"
]
},
"detectedAt": "2026-08-02T12:00:00.000Z",
"technologies": [
{
"name": "Next.js",
"category": "framework",
"evidence": "header x-powered-by: Next.js, Payload"
},
{
"name": "Vercel",
"category": "hosting",
"evidence": "header x-vercel-id: ..."
}
]
}
}Tags
x402
Reviews
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