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Tech Detect – Technology Stack Detection API (x402)
x402
Tech Detect – Technology Stack Detection API (x402) 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 (frameworks, libraries, CMS, analytics, etc.) used by a given domain, returning confidence scores and evidence for each detected technology, paid 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 technology name, category (e.g. CMS, analytics, JavaScript framework), version if detectable, a confidence score, and supporting evidence strings. Optionally compares against a previously observed set to surface additions or removals.
Example use cases
Competitor martech stack audit
“I want to know what marketing and analytics tools my competitor at acmecorp.com is using — things like email platforms, CRM integrations, tag managers, and analytics. Can you detect their full tech stack and show me the confidence for each?”
Pre-acquisition tech due diligence
“We're evaluating acquiring startupxyz.com and need to understand their technical infrastructure. Can you scan their domain and tell me every technology you detect — frontend, backend, hosting, third-party services — with confidence scores and evidence?”
Detecting Mailchimp usage on a prospect site
“Before our sales call with clientsite.com, can you check whether they're currently using Mailchimp or any other email marketing platform so I know what migration pitch to make?”
Technical details
Endpoint
POSThttps://stack.halowerk.com/stack/articles/mailchimp?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need fast, pay-per-call technology fingerprinting without signup or API key management. It is ideal for one-off lookups, agent workflows that need zero-friction access, or when you want to compare a current scan against a previous observation. Prefer it over subscription-based tech detection services (e.g. BuiltWith, Wappalyzer API) when cost-per-call economics and x402 micropayment compatibility are priorities.
Side effects
- Domain unreachable or returns non-200 status — no technologies detected
- URL malformed or exceeds 2048 characters — validation error returned
- Domain blocks scraping/fingerprinting — partial or empty results
- Low-confidence detections for heavily obfuscated or custom-built stacks
- Rate limiting or payment failure via x402 protocol — request rejected
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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