{"uid":"cap_Yy4pt9sC-u-ElyVbkD7M1","slug":"tech-detect-pay-per-call-technology-stack-detection-17f4ce3f","name":"Tech Detect — Pay-Per-Call 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/paypal?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_nQcPf2kERX3plWTGSSuWx","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 full technology stack of a given domain/URL, returning each detected technology with confidence scores and evidence, billed per call in USDC via x402.","exampleAgentPrompt":"What technologies is paypal.com running? I want confidence scores and evidence for each hit — detect the full tech stack for that domain.","exampleUseCases":[{"title":"Competitor tech stack audit","prompt":"Can you scan shopify.com and tell me what technologies they're using — frameworks, CDNs, analytics tools, everything — with confidence scores for each one?"},{"title":"Monitoring stack changes over time","prompt":"Last week I found that stripe.com was using Nginx and React. Can you scan it again now and tell me if anything in the tech stack has changed since then?"},{"title":"Lead enrichment for sales outreach","prompt":"I'm prospecting a list of SaaS companies. Can you detect the technology stack for hubspot.com so I know what tools they're running before I reach out?"}],"resultDescription":"Returns a structured list of detected technologies for the given domain, each entry including the technology name, category (e.g. CMS, CDN, JavaScript framework), version where detectable, confidence score, and supporting evidence. Covers frontend frameworks, backend technologies, analytics platforms, hosting providers, and more.","failureModes":["URL is unreachable or returns non-200 status — detection may be incomplete or return empty results","Domain uses heavy bot protection (e.g. Cloudflare challenge) — fingerprinting may be blocked","Private or internal URLs not accessible from the scanner — returns no data","Malformed URL input — validation error returned","x402 payment failure — call not processed, no results returned"],"whenToPreferThis":"Choose this endpoint when you need per-call, no-signup technology detection with crypto micropayments via x402. It is ideal for agents that need on-demand stack fingerprinting without managing API keys or subscriptions. The optional 'previous' parameter makes it especially strong for change-detection workflows where you want to diff the current stack against a prior observation.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T18:42:45.329Z","isFirstParty":false,"canonicalSlug":"tech-detect-pay-per-call-technology-stack-detection-60639ddd"}