{"uid":"cap_iWqk4HWGugU88PaZYR76w","slug":"does-site-use-varnish-82605fa2","name":"Does Site Use Varnish","description":"Does a website use Varnish? Fetches the page (homepage for a bare domain) and matches Varnish's fingerprints in the HTML and response headers, returning yes/no with the evidence snippet and the category (cache). Technographics for sales, competitor research and migration planning, one technology per call. $0.01 per check.","url":"https://site.intel.rallylive.ca/site/uses/varnish?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_k9JGhuct86Y7Agyf9xjou","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Checks whether a website uses the Varnish HTTP cache by fetching its homepage and matching Varnish fingerprints in HTML and response headers, returning a yes/no answer with evidence.","exampleAgentPrompt":"Can you check if shopify.com is using Varnish as its caching layer — I want to know if they rely on it and see what evidence shows up in the headers or HTML?","exampleUseCases":[{"title":"Competitor stack research for sales","prompt":"I'm prospecting a list of SaaS companies — can you check if stripe.com uses Varnish? I want to know their caching setup to tailor my pitch."},{"title":"Pre-migration infrastructure audit","prompt":"We're about to migrate cloudflare.com to a new CDN — can you check whether it's currently running Varnish so we know what we're replacing?"},{"title":"Technographic lead qualification","prompt":"We sell Varnish support and consulting — can you check if bbc.co.uk is using Varnish so I can decide if they're a good prospect?"}],"resultDescription":"Returns a yes/no answer indicating whether the target website uses Varnish, along with an evidence snippet (matching HTML content or response header values that triggered the fingerprint match) and a technology category label of 'cache'.","failureModes":["Domain is unreachable or returns an error, resulting in an inability to fetch the homepage","Website blocks automated requests, potentially returning a misleading no-Varnish result","Varnish is configured to hide its fingerprints, producing a false negative","Input domain is malformed or missing, causing a validation error","Rate limiting or network timeouts on the target site may cause incomplete analysis"],"whenToPreferThis":"Use this endpoint when you need a fast, single-technology check specifically for Varnish on a given domain — ideal for sales prospecting, competitive technographic research, or pre-migration audits where you want targeted evidence (header values and HTML snippets) rather than a full technology stack scan. It is priced per call at $0.01, making it cost-effective for spot checks or batch prospecting workflows where Varnish detection is the specific signal needed.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T04:27:26.857Z","isFirstParty":false,"canonicalSlug":"does-site-use-varnish-82605fa2"}