{"uid":"cap_ENFln9BS2cpwRvg0823fb","slug":"tech-detect-web-technology-stack-fingerprinter-fca79a29","name":"Tech Detect — Web Technology Stack Fingerprinter","description":"Purpose-bound Vercel observation (hosting) using the existing fresh Stack-Monitor. Returns stack_vercel_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/vercel?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_HpLbeGfi_xH149RPGFaNS","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":"Given a domain or URL, returns the detected technology stack with confidence scores and evidence for each identified technology.","exampleAgentPrompt":"What's the tech stack behind stripe.com — frameworks, CDN, analytics, everything you can detect, with confidence scores for each hit?","exampleUseCases":[{"title":"Competitor tech stack audit","prompt":"I want to know exactly what technologies my competitor acme.com is running — frontend framework, backend, hosting, analytics, any third-party tools. Give me everything with confidence levels."},{"title":"Monitor site for stack changes","prompt":"Check shopify.com's technology stack now and compare it against what we detected last week on 2024-06-01: React 18, Next.js 14, Cloudflare. Tell me what's changed or been added."},{"title":"Pre-sales tech profiling","prompt":"Before my sales call, can you detect the technology stack for hubspot.com so I know what tools they're already using and can tailor my pitch?"}],"resultDescription":"A structured list of detected technologies, each with a name, category (e.g. framework, CDN, analytics), version if detectable, a confidence score, and supporting evidence. May include frontend libraries, backend stacks, hosting providers, CMS platforms, analytics tools, and more.","failureModes":["Domain unreachable or returns non-200 response — detection fails with an error","Private/intranet domains that are not publicly accessible cannot be scanned","Bot-blocking or anti-scraping measures may prevent fingerprinting","Obfuscated or minified assets may reduce detection confidence or miss technologies","Malformed URL input returns validation error"],"whenToPreferThis":"Choose this endpoint when you need per-call, no-signup technology detection with explicit confidence and evidence per technology, especially in automated pipelines where you want pay-as-you-go pricing via USDC over x402. It supports incremental scanning via the optional 'previous' payload to diff stack changes over time, making it ideal for monitoring use cases. Prefer it over Wappalyzer-style browser extensions or BuiltWith when you need programmatic, agent-native access without API key management.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-13T00:41:02.047Z","isFirstParty":false,"canonicalSlug":"tech-detect-web-technology-stack-fingerprinter-fca79a29"}