{"uid":"cap_jl3NNoCDPFoLJ2HXlCj5z","slug":"webbersites-alt-text-audit-3cecbc8b","name":"WebberSites Alt-Text Audit","description":"Alt-text audit for any page: finds images with missing alt attributes, flags filename-as-alt and generic alt text, over-long alt, unlabeled svg[role=img], image-map areas and image inputs without alternatives. Counts decorative alt=\"\" separately. For SEO and accessibility agents.","url":"https://api.webbersites.com/api/seo/alt-check","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","description":"Public URL of the page to audit"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"issues":{"type":"array"},"missing_alt":{"type":"number"},"images_total":{"type":"number"},"low_quality_alt":{"type":"number"}}}}}}},"responseSchema":{"type":"json","example":{"url":"https://example.com","issues":[{"src":"/hero.jpg","tag":"img","issue":"missing_alt"}],"missing_alt":6,"images_total":24,"with_good_alt":15,"low_quality_alt":1,"empty_alt_decorative":2}},"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_tvzHtcLOFn8QSVhig4NGs","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":"Audits any public webpage for image accessibility issues including missing alt attributes, filename-as-alt, generic/over-long alt text, unlabeled SVGs, image-map areas, and image inputs without alternatives.","exampleAgentPrompt":"Can you audit https://example.com/about for alt text issues — I want to know which images are missing alt attributes, which have generic or filename-based alt text, and how many are decorative?","exampleUseCases":null,"resultDescription":"Returns a structured report with total image count, count of images missing alt attributes, count of low-quality alt text (generic, filename-based, or over-long), a list of specific issues with details, and a separate count of decorative images using alt=\"\".","failureModes":["URL is not publicly accessible or returns non-200 status — audit cannot be performed","Page has no images — returns zeroed counts with empty issues array","Malformed or non-HTTP URL input — returns validation error","Page behind authentication or bot-blocking — content not retrievable","Very large pages may time out or return partial results"],"whenToPreferThis":"Choose this endpoint when you specifically need image alt-text and accessibility metadata for a webpage, including nuanced checks for generic alt text, filenames used as alt, over-long descriptions, SVG roles, and image-map areas. Prefer over generic WCAG checkers when image accessibility is the primary concern, or when you need granular alt-text quality signals for SEO reporting.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:53:49.729Z","isFirstParty":false}