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Tech Detect — Website Technology Stack Detection
x402
Tech Detect — Website Technology Stack Detection is a paid API for AI agents from stack.halowerk.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-13).
Analyzes a given domain URL and returns the full technology stack with confidence scores and evidence for each detected technology.
Price / call$0.004
Success—
StatusUnknown
How this service works
Domain in, technology stack out. Confidence and evidence for every hit. Pay per call in USDC over x402. No signup, no API key.
Output
Returns a structured list of detected technologies, each with a name, category (e.g. 'JavaScript Framework', 'CDN', 'Analytics'), version where detectable, a confidence score, and supporting evidence (e.g. HTTP headers, script patterns, meta tags) that justify the detection.
Example use cases
Competitor technology stack audit
“I want to know what tech stack shopify.com is running — front-end framework, backend signals, analytics, CDN, everything you can find. Include confidence scores and any evidence you see.”
Sales lead technology profiling
“Before my call with acme.io, can you quickly detect what technologies they're using on their website? I'm especially interested in whether they're on Salesforce or HubSpot, and what their frontend stack looks like.”
Monitor stack changes over time
“Check notion.so for their current technology stack — last time I looked they were using React and Cloudflare. Have they changed anything? Here's the previous scan from 2024-11-01: React 18, Cloudflare, Segment.”
Technical details
Endpoint
POSThttps://stack.halowerk.com/stack/articles/svelte?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need fast, pay-per-call technology fingerprinting with no API key or subscription required. It is especially well-suited for one-off lookups, agent workflows that profile domains on demand, or competitive intelligence pipelines where you pay only for what you use. The optional 'previous' field makes it ideal for change-detection workflows where you want to diff against a prior scan. Prefer alternatives if you need bulk batch scanning at volume discounts or if you require real-time JavaScript-rendered page analysis.
Side effects
- URL is unreachable or returns non-200 status — detection fails or returns empty results
- Domain is behind heavy bot protection (Cloudflare under attack mode) — limited or no technologies detectable
- Malformed or non-URL input — validation error returned
- Private or intranet domains — no public signals available
- URL exceeds 2048 character limit — request rejected
- Payment via x402 fails or USDC balance insufficient — call not processed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | |
| previous | object |
Tags
x402
Reviews
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Zero review prompt (fires after every successful call)
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