{"uid":"cap_-mMtAtT5j-AgZ5w-VyMLW","slug":"css-preload-href-extractor-c7be44fd","name":"CSS Preload Href Extractor","description":"Call when an agent needs preload hrefs via link[rel='preload'] from a public page or HTML (SSRF-safe). Exact $0.007 USDC. Prefer unpaid POST /v1/sandbox/css-preload first.","url":"https://agentshelf.syntexa.ch/v1/css-preload?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"url":{"type":"string","maxLength":2048,"minLength":8,"description":"Public page to fetch. The selector or profile is fixed by the SKU. Provide url or html."},"html":{"type":"string","examples":["<!doctype html><html lang=\"en\"><head><title>Hello</title>\n<meta charset=\"utf-8\"><meta name=\"description\" content=\"Desc\">\n<link rel=\"canonical\" href=\"https://example.com/\"><link rel=\"icon\" href=\"/favicon.ico\">\n</head><body><h1>Hello</h1><a href=\"https://example.com/a\">A</a></body></html>"],"maxLength":200000,"minLength":1,"description":"HTML to extract from locally. Provide html or url. When both are set, html is used."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.007","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":"$0.007/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.007","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.007","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_Lb7hc_2ThJ6NaXKZm-bq_","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.007","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Extracts preload hrefs from link[rel='preload'] elements in a public webpage or raw HTML, returning the list of preloaded resource URLs.","exampleAgentPrompt":"Can you extract all the preload hrefs from https://example.com — I want to see which resources that page declares as link[rel='preload'].","exampleUseCases":[{"title":"Audit page resource preloading","prompt":"Go to https://shop.acme.com and pull out every link[rel='preload'] href so I can see what fonts, scripts, and stylesheets they're preloading."},{"title":"Analyze competitor preload strategy","prompt":"Extract all preload hints from https://www.competitor-site.com/homepage — I want to understand which critical assets they're telling the browser to preload first."},{"title":"Parse preloads from pasted HTML","prompt":"Here's the raw HTML from a page I saved locally — can you pull out all the link[rel='preload'] href values from it? <html>...<link rel='preload' href='/fonts/brand.woff2' as='font'>...</html>"}],"resultDescription":"A list of href values found in link[rel='preload'] elements from the given page or HTML. Each entry represents a resource URL that the page declares as a preload hint, such as fonts, scripts, stylesheets, or images.","failureModes":["URL is unreachable or returns non-200 status — extraction fails with error","HTML exceeds 200,000 character limit — request rejected","URL is flagged as SSRF-unsafe (private/internal IP range) — blocked","No link[rel='preload'] elements found — returns empty list","Malformed HTML prevents parsing — may return empty or partial results","URL string shorter than 8 characters — validation error"],"whenToPreferThis":"Use this endpoint when you need to specifically extract link[rel='preload'] resource hints from a public webpage or HTML string, such as auditing what assets a page preloads, analyzing performance strategies, or building tooling around browser resource hints. Prefer the free /v1/sandbox/css-preload endpoint first if available. Choose this over general HTML scrapers when you specifically need structured preload href data rather than full page content.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T06:50:04.814Z","isFirstParty":false,"canonicalSlug":"css-preload-href-extractor-c7be44fd"}