{"uid":"cap_TKflrx3J_v_hWqZ4rrX-8","slug":"tech-detect-technology-stack-detection-api-x402-42f70fcb","name":"Tech Detect – Technology Stack Detection API (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/mailchimp?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_GPzpkJr4Enm1RQbAAKRPf","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, CMS, analytics, etc.) used by a given domain, returning confidence scores and evidence for each detected technology, paid per call in USDC via x402.","exampleAgentPrompt":"Can you detect what technology stack stack.halowerk.com is running — frameworks, CMS, analytics tools, anything you can find — and tell me the confidence level for each hit?","exampleUseCases":[{"title":"Competitor martech stack audit","prompt":"I want to know what marketing and analytics tools my competitor at acmecorp.com is using — things like email platforms, CRM integrations, tag managers, and analytics. Can you detect their full tech stack and show me the confidence for each?"},{"title":"Pre-acquisition tech due diligence","prompt":"We're evaluating acquiring startupxyz.com and need to understand their technical infrastructure. Can you scan their domain and tell me every technology you detect — frontend, backend, hosting, third-party services — with confidence scores and evidence?"},{"title":"Detecting Mailchimp usage on a prospect site","prompt":"Before our sales call with clientsite.com, can you check whether they're currently using Mailchimp or any other email marketing platform so I know what migration pitch to make?"}],"resultDescription":"Returns a list of detected technologies for the given domain, each with a technology name, category (e.g. CMS, analytics, JavaScript framework), version if detectable, a confidence score, and supporting evidence strings. Optionally compares against a previously observed set to surface additions or removals.","failureModes":["Domain unreachable or returns non-200 status — no technologies detected","URL malformed or exceeds 2048 characters — validation error returned","Domain blocks scraping/fingerprinting — partial or empty results","Low-confidence detections for heavily obfuscated or custom-built stacks","Rate limiting or payment failure via x402 protocol — request rejected"],"whenToPreferThis":"Choose this endpoint when you need fast, pay-per-call technology fingerprinting without signup or API key management. It is ideal for one-off lookups, agent workflows that need zero-friction access, or when you want to compare a current scan against a previous observation. Prefer it over subscription-based tech detection services (e.g. BuiltWith, Wappalyzer API) when cost-per-call economics and x402 micropayment compatibility are priorities.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T18:43:30.003Z","isFirstParty":false,"canonicalSlug":"tech-detect-technology-stack-detection-api-x402-42f70fcb"}