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Tech Detect — Technology Stack Detection via x402
x402
Tech Detect — Technology Stack Detection via x402 is a paid API for AI agents from stack.halowerk.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-13).
Analyzes a domain URL and returns its detected technology stack with confidence scores and evidence, billed per-call in USDC via x402 protocol
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. web server, CMS, JavaScript framework, analytics), version (if detectable), confidence score, and supporting evidence indicating how the technology was identified.
Example use cases
Competitive tech stack audit
“What's the full technology stack behind notion.so? I want to know their frontend framework, backend indicators, CDN, analytics, and anything else you can detect, with confidence levels for each.”
Security and infrastructure recon
“Scan github.com and tell me what web server and infrastructure technologies it's using — I'm particularly interested in whether it's running Caddy, Nginx, or something else, and any version info you can detect.”
Monitoring stack drift over time
“Check shopify.com for its current tech stack. Last time I looked on 2024-11-01 it was running Nginx 1.21 and React — has anything changed since then?”
Technical details
Endpoint
POSThttps://stack.halowerk.com/stack/articles/caddy?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need pay-as-you-go technology stack detection without API key signup — ideal for one-off queries, agent workflows, or low-volume use cases billed in USDC via x402. Prefer it over subscription-based alternatives like BuiltWith or Wappalyzer when you want frictionless access with per-call pricing. The optional `previous` field makes it especially useful for change-detection workflows where you want to diff against a prior observation.
Side effects
- Invalid or unreachable URL returns an error or empty technology list
- Domain blocks fingerprinting requests, leading to low or zero detections
- Version information unavailable for obfuscated or CDN-proxied sites
- Payment failure via x402 protocol results in 402 response and no data returned
- Malformed input schema (missing required fields) returns validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | |
| previous | object |
Tags
x402
Reviews
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