{"uid":"cap_fRdEKsuf_5zDqvLZUcnxI","slug":"h4-empty-attribute-value-report-7da2056d","name":"H4 Empty Attribute Value Report","description":"Level-four headings — Empty value report: Empty value report for Level-four headings. One public HTTPS page or supplied HTML; static parsing, no JavaScript rendering, login or access bypass. Specialised preset in a shared 50-profile, 20-operation engine. 0.01 USDC includes one bounded empty value report result.","url":"https://market.datapackvibe.com/x402/assistant-bx-web-h4-empty?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"url":{"type":"string","default":"","maxLength":2048},"html":{"type":"string","default":"<!doctype html><html><head></head><body><h4 id=\"sample\" data-kind=\"example\">Example product guide</h4></body></html>","maxLength":100000},"term":{"type":"string","default":"product","maxLength":100,"minLength":1},"attribute":{"type":"string","default":"id","pattern":"^[a-zA-Z][a-zA-Z0-9:_-]{0,49}$","maxLength":50},"previous_texts":{"type":"array","items":{"type":"string","default":"","maxLength":1000},"default":["Older example"],"maxItems":200,"minItems":0},"attribute_value":{"type":"string","default":"sample","maxLength":200}}},"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_f-d_xOjleVgtTYtaLO0Qu","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":"Parses H4 heading elements from a webpage or HTML snippet and reports which ones have empty values for a specified HTML attribute.","exampleAgentPrompt":"Can you check https://example.com/docs for any H4 headings that have an empty 'id' attribute, looking specifically for headings related to 'product'?","exampleUseCases":[{"title":"Accessibility audit for heading IDs","prompt":"Check this HTML page at https://mysite.com/guide for any H4 headings where the 'id' attribute is empty — I need to know which headings are missing IDs so I can fix accessibility issues."},{"title":"SEO data-attribute completeness check","prompt":"Scan https://shop.example.com/products for H4 headings that have a blank 'data-category' attribute value; the headings I care about are related to 'pricing'."},{"title":"HTML template validation for empty classes","prompt":"I have this HTML snippet — can you find all the H4 headings that have an empty 'class' attribute? Here's the markup: <!doctype html><html><body><h4 class=\"\">Guide</h4><h4 class=\"tip\">Tip</h4></body></html>"}],"resultDescription":"Returns a bounded empty value report identifying which H4 heading elements have empty (blank) values for the specified attribute, parsed statically from a supplied URL or raw HTML without JavaScript rendering or authentication.","failureModes":["URL is unreachable or returns non-200 status — report may be empty or error returned","HTML exceeds 100,000 character limit — request rejected","Attribute name does not match pattern ^[a-zA-Z][a-zA-Z0-9:_-]{0,49}$ — validation error","Page requires JavaScript rendering — dynamic content not captured","No H4 elements found in provided HTML or page — empty result set returned"],"whenToPreferThis":"Use this endpoint when you need a focused, low-cost static analysis of H4-level heading attribute emptiness specifically — particularly when you want to audit a single page's fourth-level headings for missing or blank attribute values without needing JavaScript execution, login access, or full-page structural analysis.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T18:52:22.549Z","isFirstParty":false,"canonicalSlug":"h4-empty-attribute-value-report-7da2056d"}