{"uid":"cap_EtVfAhH4j0y3PJS7gi0Ui","slug":"url-content-diff-comparator-1b3993cd","name":"URL Content Diff Comparator","description":"Fourteen pay-per-call web tools for AI agents, billed in USDC on Base with no account or API key. START WITH /audit -- one call returns a complete page health check (SEO + structured data + accessibility, optionally plus links and sitemap) with a single score and one worst-first findings list. The parts are also sold individually. SITE AUDIT: /seo (on-page SEO and meta tags), /links (broken links), /sitemap (robots.txt and XML sitemap crawlability), /structured (JSON-LD and social preview tags), /a11y (WCAG accessibility) -- each scored 0-100 with a prioritised issue list. READING: /read (clean markdown), /snap (screenshot, PDF or rendered HTML), /tables (every HTML table as structured JSON), /verify (does a claim actually appear on this page). MONITORING: /watch (has this page changed), /compare (what differs between two pages). Plus /rank (best x402 service for a task) and /batch (several operations behind one payment).","url":"https://x402-zadenworks.zaden-gaming.workers.dev/compare","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","bodyType","body"],"properties":{"body":{"type":"object","required":["urlA","urlB"],"properties":{"urlA":{"type":"string","description":"First public http/https URL"},"urlB":{"type":"string","description":"Second public http/https URL"},"waitMs":{"type":"integer","maximum":5000,"minimum":0},"selector":{"type":"string","description":"Optional CSS selector applied to both pages before comparing"},"maxDiffItems":{"type":"integer","maximum":50,"minimum":1}}},"type":{"type":"string","const":"http"},"method":{"enum":["POST"],"type":"string"},"bodyType":{"enum":["json","form-data","text"],"type":"string"}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"onlyInA":{"type":"array","items":{"type":"string"}},"onlyInB":{"type":"array","items":{"type":"string"}},"identical":{"type":"boolean"},"wordCountDelta":{"type":"integer"}}}}}}},"responseSchema":{"type":"json","example":{"urlA":"https://example.com","urlB":"https://example.org","onlyInA":[],"onlyInB":[],"identical":true,"wordCountA":20,"wordCountB":20,"wordCountDelta":0}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","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":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_iQ7OCNRb61ufZcCbX8wA0","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Compares the text content of two URLs and reports paragraphs unique to each side, word count delta, and whether the pages are identical.","exampleAgentPrompt":"Compare the content of https://example.com/page-v1 and https://example.com/page-v2 — show me which paragraphs are unique to each side, the word count difference, and whether they're identical.","exampleUseCases":[{"title":"Editorial change audit between versions","prompt":"I updated our About page — can you compare https://acme.com/about-old and https://acme.com/about to show me exactly which paragraphs are new and which were removed, and tell me the word count difference?"},{"title":"Competitor content divergence check","prompt":"Compare https://competitor-a.com/pricing and https://competitor-b.com/pricing and tell me which paragraphs are unique to each page and whether they're saying fundamentally the same things."},{"title":"Syndication duplicate detection","prompt":"I want to know if our article at https://ourblog.com/article-123 and the version at https://partnernews.com/article-456 are identical or if the partner changed any content — show me what's different."}],"resultDescription":"Returns a structured diff with: a boolean indicating whether the two pages are identical, a word count delta (numeric difference), and arrays of paragraphs that appear exclusively in URL A versus exclusively in URL B, allowing the caller to understand exactly how the two pages diverge textually.","failureModes":["One or both URLs are unreachable or return non-200 status — error returned with which URL failed","Pages are behind authentication/paywalls — content may be incomplete or empty","JavaScript-heavy pages may not render fully if JS execution is limited","Very large pages may time out or be truncated","URLs pointing to non-text content (images, PDFs, binaries) will yield no meaningful diff"],"whenToPreferThis":"Choose this endpoint when you need a structured, paragraph-level textual diff between two live web pages — especially when you care about which specific passages are unique to each side and want a word count delta. Prefer it over manual scraping + diffing when you need a single API call that handles fetching and comparison atomically. It's well-suited for editorial audits, syndication checks, and A/B content comparisons.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T06:30:35.254Z","isFirstParty":false}