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Tech Detect — GA4 Technology Stack Detection
x402
Tech Detect — GA4 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).
Detects whether a given domain uses Google Analytics 4 (GA4) and returns confidence scores and evidence for the technology hit, paid per call via x402 USDC.
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 technology detection result for the queried domain, including whether GA4 is present, a confidence score, supporting evidence for the detection, technology category, and version information where available.
Example use cases
Competitor analytics stack audit
“Scan shopify.com and tell me if they're using GA4, with evidence and confidence for each hit — I want to know what analytics stack they're running.”
GA4 migration verification
“We just migrated our site at acme.com from Universal Analytics to GA4 last week — can you confirm GA4 is now detected there with high confidence?”
Lead enrichment for SaaS analytics tool
“I have a prospect at hubspot.com — check if they're currently running GA4 so I know whether to pitch our GA4 integration or a migration path.”
Technical details
Endpoint
POSThttps://stack.halowerk.com/stack/articles/ga4?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need fast, pay-as-you-go technology detection for a specific domain with no API key or subscription required. It is especially suited for GA4-specific detection tasks, one-off competitive intelligence lookups, or enrichment pipelines where you only pay for calls made. Prefer it over full-crawl solutions when you need a lightweight, per-domain signal with confidence scoring rather than a broad technology audit.
Side effects
- Invalid or unreachable URL returns an error or empty technology list
- Payment failure over x402 results in 402 response and no data returned
- Domain with heavy bot protection may yield low-confidence or incomplete results
- Malformed URL input exceeding 2048 characters rejected by schema validation
- If previous observations array exceeds 150 items the request will be rejected
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | |
| previous | object |
Tags
x402
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