{"uid":"cap_teJGokXD2Y9xouhlrsjBC","slug":"agentshelf-css-track-src-extractor-d9fa0065","name":"AgentShelf CSS track[src] Extractor","description":"Call when an agent needs text track sources via track[src] from a public page or HTML (SSRF-safe). Exact $0.005 USDC. Prefer unpaid POST /v1/sandbox/css-track-src first.","url":"https://agentshelf.syntexa.ch/v1/css-track-src?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":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_ABaSeHgCE_k_QkjfQ5sfu","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Extracts text track source URLs (track[src] attributes) from HTML or a public web page URL, returning all values found in <track> elements.","exampleAgentPrompt":"Can you pull out all the text track source URLs (like subtitle or caption file links) from this video page? The URL is https://example.com/video/episode-1","exampleUseCases":[{"title":"Subtitle URL discovery for video","prompt":"I need to find all the subtitle and caption track file URLs from this video page at https://streaming-site.com/watch/movie-123 — can you extract the track src values from it?"},{"title":"Accessibility audit for media content","prompt":"Check this HTML I'm pasting and pull out every track[src] attribute so I can verify which caption and audio description files are being referenced: <video><track src='/captions/en.vtt' kind='subtitles'><track src='/captions/ad.vtt' kind='descriptions'></video>"},{"title":"Caption source inventory for media pipeline","prompt":"We're building a media catalog and need the text track source URLs from each of our video pages. Start with https://media.example.com/shows/pilot and extract all the track src values."}],"resultDescription":"Returns a list of all src attribute values found on <track> elements within the fetched or provided HTML, typically pointing to WebVTT or timed text files used for subtitles, captions, chapters, or audio descriptions.","failureModes":["URL is unreachable or returns non-200 status — extraction fails with an error","Provided HTML exceeds 200,000 character limit — request rejected","URL blocked due to SSRF protection (private/internal IP ranges) — returns SSRF error","No track elements found in the HTML — returns empty list","Malformed HTML provided — parser may return incomplete or empty results","URL string shorter than 8 characters or HTML shorter than 1 character — validation error"],"whenToPreferThis":"Use this endpoint when you need to extract text track (subtitle, caption, chapter, or description) source file URLs from a public web page or a known HTML fragment. It is SSRF-safe, making it suitable for agent pipelines where arbitrary URLs are processed. Prefer the unpaid sandbox at POST /v1/sandbox/css-track-src for testing. Choose this over a general HTML scraper when you specifically need track[src] values for media accessibility or subtitle pipeline work.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T06:49:58.048Z","isFirstParty":false,"canonicalSlug":"agentshelf-css-track-src-extractor-d9fa0065"}