{"uid":"cap_wIu6Fyd2xnKtVsnlOEAly","slug":"tech-detect-website-technology-stack-fingerprinter-ca5fc43f","name":"Tech Detect — Website Technology Stack Fingerprinter","description":"Purpose-bound Umami observation (analytics) using the existing fresh Stack-Monitor. Returns stack_umami_decision, direct versus inferred status, evidence, optional version difference against a caller-owned baseline and reusable snapshot. Missing fingerprints do not prove absence. No background scheduling, CVE, compatibility or installed-extension inventory. Existing outbound safeguards remain in the injected motor. One public HTTPS root domain, up to150 baseline technologies; 9s timeout.","url":"https://stack.halowerk.com/stack/articles/umami?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_5p-a8mtKNV64bLXkiKuqI","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 the technology stack (frameworks, libraries, CMSs, analytics tools, etc.) used by a given domain URL, returning each technology with confidence scores and supporting evidence.","exampleAgentPrompt":"Can you detect the full technology stack for shopify.com — I want to know every framework, CMS, analytics tool, and library they use, along with confidence scores for each hit?","exampleUseCases":[{"title":"Competitor tech stack audit","prompt":"What technologies is stripe.com running? I want to see their frontend frameworks, backend signals, analytics tools, and anything else you can detect, with confidence scores for each."},{"title":"Sales lead enrichment","prompt":"I have a prospect at acme.com — before my call, can you figure out what CMS, ecommerce platform, and marketing tools their site uses so I know what stack to pitch against?"},{"title":"Ongoing stack change monitoring","prompt":"Last week you told me notion.so was using Next.js and Segment — can you re-scan them now and tell me if anything in their tech stack has changed since then?"}],"resultDescription":"Returns a list of detected technologies for the given domain, each entry including the technology name, its category (e.g. 'CMS', 'Analytics', 'JavaScript Framework'), detected version if available, a confidence score, and evidence supporting the detection. Optionally compares against a previously observed snapshot to highlight changes.","failureModes":["Unresolvable or offline domain returns no technologies or an error","Heavily obfuscated sites may yield low-confidence or sparse results","Rate limiting or payment failure via x402 protocol results in HTTP 402 with no data","Invalid URL format triggers input validation error","Sites with aggressive bot-blocking may defeat fingerprinting probes"],"whenToPreferThis":"Choose this endpoint when you need per-call, pay-as-you-go technology stack detection with no API key or subscription required. Particularly well-suited for agents that need to enrich CRM records, conduct competitive analysis, or monitor stack changes on an ad-hoc basis. The optional 'previous' parameter makes it ideal for change-detection workflows. The x402 payment model makes it trivially embeddable in autonomous agent pipelines without credential management.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-13T00:41:32.561Z","isFirstParty":false,"canonicalSlug":"tech-detect-website-technology-stack-fingerprinter-ae8ec015"}