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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 domain URL, returning identified technologies with confidence scores and evidence, billed per call in USDC via 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 domain, each with a name, category (e.g. CDN, CMS, JavaScript framework), version if detectable, a confidence score, and supporting evidence. An optional 'previous' snapshot can be supplied to enable change-detection diffing.
Example use cases
Competitor tech stack audit
“I want to know what technology stack shopify.com is running — front-end frameworks, back-end servers, CDN, analytics, everything you can find, with confidence levels for each.”
Monitor stack changes over time
“Last week you told me notion.so was using CloudFront and Next.js. Can you re-scan it now and tell me if anything in their tech stack has changed since then?”
Pre-sales tech qualification
“Before I pitch our migration service, can you detect what CMS and hosting technologies acmecorp.com is currently using so I know if they're a good fit?”
Technical details
Endpoint
POSThttps://stack.halowerk.com/stack/articles/crisp?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need pay-as-you-go technology detection with no signup or API key, especially for one-off or low-volume scans. It is ideal for agents that need structured, confidence-annotated tech stack data with optional change-detection support via the 'previous' field. Prefer over scraping solutions when you need categorized, versioned technology hits rather than raw HTML.
Side effects
- Domain unreachable or returns non-200: detection may return empty or partial results
- Invalid URL format: request rejected with validation error
- Ambiguous or heavily obfuscated stack: low-confidence or no hits returned
- Payment failure via x402: request not processed, no result returned
- Rate limiting or anti-bot measures on target domain: reduced detection accuracy
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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