{"uid":"cap_OdurQ0GNhSwjryJ_2nVJi","slug":"tech-detect-technology-stack-detection-via-x402-04e582bd","name":"Tech Detect — Technology Stack Detection via x402","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/hcaptcha?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_H3M8YAjef10YJVKHdg-5f","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 used by a given domain, returning confidence scores and evidence for each identified technology, paid per-call in USDC over x402.","exampleAgentPrompt":"Can you scan stripe.com and tell me what technologies it's using — I want confidence scores and evidence for each one, including any previous stack data I should compare against?","exampleUseCases":[{"title":"Competitor tech stack audit","prompt":"I want to know exactly what technologies Shopify is running on their storefront — frontend frameworks, analytics, CDN, payment providers, everything. Give me confidence scores too."},{"title":"Security tooling reconnaissance","prompt":"Before our pentest, can you scan example-target.com and tell me what web frameworks, server software, and security tools like WAFs or CAPTCHAs it's using?"},{"title":"Monitor stack drift over time","prompt":"We scanned acmecorp.com last week and found React, Cloudflare, and Stripe. Can you re-scan it now and tell me if anything has changed in their tech stack?"}],"resultDescription":"Returns a list of detected technologies for the given domain, each with its name, category (e.g. CMS, CDN, analytics), version if detectable, a confidence score, and supporting evidence. Optionally compares against a previously observed snapshot to highlight changes.","failureModes":["Domain is unreachable or returns no HTTP response — detection cannot proceed","Domain uses aggressive bot-blocking that prevents fingerprinting — partial or empty results","Previously observed technologies object malformed or missing required fields — 400 validation error","URL exceeds 2048 characters — rejected by schema validation","Payment not confirmed over x402 — request blocked before processing","Domain exists but has no detectable technologies — empty technology array returned"],"whenToPreferThis":"Choose this endpoint when you need no-signup, pay-per-call technology fingerprinting with confidence scores and evidence, especially for one-off or low-volume domain scans where recurring API key subscriptions are overkill. The x402 micropayment model makes it ideal for agent workflows that need to scan arbitrary domains on demand without pre-provisioning credentials. Particularly useful when you have a prior snapshot and want delta-detection.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-13T00:41:28.008Z","isFirstParty":false,"canonicalSlug":"tech-detect-technology-stack-detection-via-x402-35a93e11"}