{"uid":"cap_SwEpMKfvQO_5vm_PAv2iG","slug":"does-site-use-web-vitals-script-572445e7","name":"does-site-use-web-vitals-script","description":"Does a website use web-vitals script? Fetches the page (homepage for a bare domain) and matches web-vitals script's fingerprints in the HTML and response headers, returning yes/no with the evidence snippet and the category (performance). Technographics for sales, competitor research and migration planning, one technology per call. $0.01 per check.","url":"https://site.intel.rallylive.ca/site/uses/web-vitals-script?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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_wZkO-Zk2NT71FVsHBPN6_","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's homepage uses the web-vitals JavaScript library by fingerprinting its HTML and response headers, returning a yes/no answer with evidence.","exampleAgentPrompt":"Can you check if shopify.com is using the web-vitals script on its homepage? I want to know if they're tracking Core Web Vitals performance metrics.","exampleUseCases":[{"title":"Competitor performance stack research","prompt":"I'm doing competitive research on our top 5 rivals — can you check if acmecorp.com is using the web-vitals script so I know whether they're actively monitoring their page performance?"},{"title":"Sales prospect technographic enrichment","prompt":"We sell performance optimization tools and want to target companies already measuring web vitals. Can you check if techstartup.io has the web-vitals script installed on their site?"},{"title":"Migration readiness audit","prompt":"We're planning a site migration and need to know if our current site, mybrand.com, already has the web-vitals library in place before we switch platforms — can you check?"}],"resultDescription":"Returns a yes/no boolean indicating whether the web-vitals script was detected on the site's homepage, along with the matching evidence snippet found in the HTML or response headers, and the technology category label (performance).","failureModes":["Domain is unreachable or returns a non-200 status — result may be inconclusive or an error","The site serves a JavaScript-rendered SPA where web-vitals is loaded dynamically — static fingerprinting may return false negative","Minified or obfuscated script names may evade fingerprint matching","Rate limiting or bot protection on the target site may block the fetch"],"whenToPreferThis":"Use this endpoint when you need a fast, low-cost ($0.01) single-domain check for web-vitals script presence as part of sales prospecting, competitive intelligence, or migration planning. Prefer this over bulk endpoints when checking one domain at a time or when you need immediate yes/no results with evidence. Choose this over generic website crawlers when you specifically need technographic data about web-vitals adoption.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-15T12:37:16.263Z","isFirstParty":false,"canonicalSlug":"does-site-use-web-vitals-script-572445e7"}