{"uid":"cap_NXFxyfomNjIpuzNRdNgQQ","slug":"ishob-site-speed-core-web-vitals-7ce2af0f","name":"ISHOB Site Speed & Core Web Vitals","description":"Page speed & Core Web Vitals from a real headless-Chromium load (mobile or desktop): LCP, CLS, FCP, TTFB, total blocking time with good/needs-improvement/poor ratings, load timings, request count and page weight by resource type. Unthrottled lab run from Cloudflare's network (not Lighthouse, not field data). robots.txt respected.","url":"https://api.ishob.com/v1/site-speed?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","required":["url"],"properties":{"url":{"type":"string","format":"uri","maxLength":2048},"device":{"enum":["mobile","desktop"],"type":"string","default":"mobile"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"weight":{"requests":38,"total_transfer_bytes":412345},"overall":"good","core_web_vitals":{"cls":{"value":0.02,"rating":"good"},"lcp_ms":{"value":1210,"rating":"good"}}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_amjMwIm-KrK3MzM4B45UA","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Runs a real headless-Chromium page load (mobile or desktop) from Cloudflare's network to measure Core Web Vitals (LCP, CLS, FCP, TTFB, TBT) and page weight with good/needs-improvement/poor ratings","exampleAgentPrompt":"Can you run a real headless-Chrome page speed test on https://www.example.com on mobile and tell me the LCP, CLS, FCP, TTFB scores with their good/needs-improvement/poor ratings and how heavy the page is?","exampleUseCases":[{"title":"Pre-launch landing page audit","prompt":"Before we go live, can you measure the Core Web Vitals — LCP, CLS, FCP, TTFB — for https://staging.myproduct.com on mobile and tell me if anything is rated poor or needs improvement?"},{"title":"SEO performance check for desktop","prompt":"I need to check if our homepage https://www.mybrand.com passes Core Web Vitals on desktop — can you run a real browser test and show me each metric with its rating?"},{"title":"Competitor benchmarking","prompt":"Can you test the page speed and Core Web Vitals of https://www.competitor.com on mobile, including total page weight, number of requests, and LCP and CLS ratings?"}],"resultDescription":"Returns a JSON object with: an overall rating (good/needs-improvement/poor), individual Core Web Vitals metrics (LCP, CLS, FCP, TTFB, Total Blocking Time) each with their numeric value and rating, total number of HTTP requests, and total transfer size in bytes — all measured from a real unthrottled headless-Chromium load from Cloudflare's network.","failureModes":["URL is unreachable or returns an error — endpoint may return an error or empty metrics","robots.txt disallows crawling — the test will be skipped to respect the directive","Invalid URL format — request rejected with validation error","Timeout if the page takes too long to load or has infinite redirects","Non-HTTP/HTTPS URL schemes — likely rejected by URL validation"],"whenToPreferThis":"Choose this endpoint when you need real browser-based Core Web Vitals measurements (not synthetic Lighthouse scores or field data aggregates) run from Cloudflare's network without throttling. Ideal for programmatic performance checks, CI/CD pipelines, SEO audits, or competitive benchmarking where you need LCP, CLS, FCP, TTFB, and TBT with clear good/needs-improvement/poor ratings and resource-level page weight data.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-14T06:38:43.636Z","isFirstParty":false,"canonicalSlug":"ishob-site-speed-core-web-vitals-7ce2af0f"}