{"uid":"cap_iBT2V5kdjmYWvcqXiGHEt","slug":"agentshelf-syntexa-ch-css-h4-extractor-b9a8ef5e","name":"agentshelf.syntexa.ch CSS H4 Extractor","description":"Call when an agent needs h4 text via h4 from a public page or HTML (SSRF-safe). Exact $0.003 USDC. Prefer unpaid POST /v1/sandbox/css-h4 first.","url":"https://agentshelf.syntexa.ch/v1/css-h4?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":"0.003","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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_ZbbUbl1n2599Cz5XKvjtI","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Extracts all H4 heading text from a public webpage URL or raw HTML using CSS selection, with SSRF protection.","exampleAgentPrompt":"Can you grab all the H4 headings from https://example.com/article so I can see the subheading structure of that page?","exampleUseCases":[{"title":"Outline extraction from article page","prompt":"Pull all the H4 headings from https://docs.somelibrary.io/reference so I can get an overview of the section structure without reading the whole page."},{"title":"Competitor page analysis","prompt":"Fetch the H4 subheadings from this competitor's landing page HTML I'm pasting — I want to see what sub-topics they're highlighting."},{"title":"SEO heading audit","prompt":"Extract all H4 tags from https://myblog.com/post/seo-guide so I can audit whether the heading hierarchy looks right."}],"resultDescription":"Returns the text content of all H4 elements found on the given page or within the provided HTML, as an array or concatenated text strings extracted via CSS h4 selector.","failureModes":["URL is not publicly accessible or requires authentication","SSRF-blocked URL (private IP ranges, localhost, internal hostnames)","HTML exceeds 200,000 character limit","URL string shorter than 8 characters or longer than 2048 characters","Page has no H4 elements, returning empty result","Malformed HTML that prevents parsing","Network timeout fetching the remote URL"],"whenToPreferThis":"Use this endpoint when you need only H4-level headings from a page or HTML blob, and want an SSRF-safe fetch from a public URL without running your own browser. Prefer the free sandbox endpoint /v1/sandbox/css-h4 first for testing; use this paid endpoint ($0.003 USDC) for production or when the sandbox is unavailable.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-24T00:54:04.741Z","isFirstParty":false,"canonicalSlug":"agentshelf-syntexa-ch-css-h4-extractor-b9a8ef5e"}