{"uid":"cap_UcD0QMvs6fP2CPmaudnLe","slug":"tech-detect-ga4-technology-stack-detection-5e807e63","name":"Tech Detect — GA4 Technology Stack Detection","description":"Domain in, technology stack out. Confidence and evidence for every hit. Pay per call in USDC over x402. No signup, no API key.","url":"https://stack.halowerk.com/stack/articles/ga4?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"url":{"type":"string","maxLength":2048},"previous":{"type":"object","required":["observed_at","technologies"],"properties":{"observed_at":{"type":"string","maxLength":40},"technologies":{"type":"array","items":{"type":"object","required":["name","category","version"],"properties":{"name":{"type":"string","maxLength":150},"version":{"type":["string","null"],"maxLength":80},"category":{"type":"string","maxLength":80}},"additionalProperties":false},"maxItems":150}},"additionalProperties":false}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.004","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.004/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.004","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.004","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_aoUvfPUSE6cPSWzLJ52AN","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.004","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"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.","exampleAgentPrompt":"Can you check whether stripe.com is running Google Analytics 4 — I want confidence scores and evidence for any GA4 hits you find?","exampleUseCases":[{"title":"Competitor analytics stack audit","prompt":"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."},{"title":"GA4 migration verification","prompt":"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?"},{"title":"Lead enrichment for SaaS analytics tool","prompt":"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."}],"resultDescription":"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.","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-13T00:40:38.923Z","isFirstParty":false,"canonicalSlug":"tech-detect-ga4-technology-stack-detection-5e807e63"}