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Tech Detect — Pay-Per-Call Technology Stack Detection
x402
Tech Detect — Pay-Per-Call 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 2026-10-12).
Detects the technology stack of a given URL/domain, returning confidence scores and evidence for each identified technology, billed per call in USDC over x402.
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 list of detected technologies for the given URL, each with a name, category (e.g. CDN, CMS, JavaScript framework), version where detectable, confidence score, and supporting evidence. May also indicate technologies no longer present compared to a previously observed snapshot.
Example use cases
Competitor tech stack audit
“Scan shopify.com and tell me every technology you can detect — frameworks, payment tools, analytics, CDN, anything — with confidence levels for each one.”
Monitor stack changes over time
“Check https://vercel.com for its current technology stack — I last scanned it on 2024-11-01 when it was running Next.js 14.0 and Cloudflare, so flag anything that's changed since then.”
Pre-sales technology qualification
“I need to know what CMS and marketing automation tools are running on https://acmecorp.com before our sales call — can you detect their full tech stack with evidence?”
Technical details
Endpoint
POSThttps://stack.halowerk.com/stack/articles/google-maps?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need per-call, no-signup technology fingerprinting of any public URL with structured confidence scores and evidence — especially useful in agentic workflows where API key management is impractical and USDC micropayments via x402 are preferred. Particularly strong when you want to diff a site's stack against a previously observed snapshot to detect changes.
Side effects
- URL is unreachable or returns non-200 status — detection may fail or return empty results
- Domain blocks automated scanning — may return partial or no results
- Unknown or highly custom technology stacks may yield low-confidence or no matches
- Malformed URL input returns validation error
- x402 payment failure or insufficient USDC balance prevents call from completing
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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