{"uid":"cap_dH5T_poMBdouAN-4arcnG","slug":"agent-market-lab-website-change-check-52e4b70c","name":"Agent Market Lab Website Change Check","description":"Pay-per-call public-web extraction, ecommerce data including a 10-product batch, change detection and website business research for autonomous agents via x402 on Base.","url":"https://agent-market-lab.fidelly.eu/v1/website-change-check?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"url":{"type":"string","format":"uri","maxLength":2048,"description":"Absolute public HTTP or HTTPS URL to snapshot and compare."},"baselineId":{"type":"string","format":"uuid","description":"Optional snapshot ID previously returned for the same normalized URL. Omit to compare with the latest stored snapshot."}}},"responseSchema":{"type":"json","example":{"ok":true,"data":{"url":"https://example.com/","changed":null,"changes":null,"current":{},"baseline":null,"createdAt":"2026-10-09T00:00:00.000Z","snapshotId":"123e4567-e89b-42d3-a456-426614174000","contentHash":"sha256-example"},"tool":"monitor_website_changes","requestId":"123e4567-e89b-42d3-a456-426614174000"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.1","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":"$0.1/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.1","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.1","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_bGf1_2wS_06TpSUuc36Wm","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.1","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Snapshots a public URL and compares it to a previous baseline snapshot to detect whether the page content has changed.","exampleAgentPrompt":"Check whether https://example.com/pricing has changed since last time — compare it against my previous snapshot ID 123e4567-e89b-42d3-a456-426614174000 and tell me if anything is different.","exampleUseCases":[{"title":"Competitor pricing page tracker","prompt":"Keep an eye on https://competitor.com/pricing — has anything on that page changed since my last snapshot (baseline ID a1b2c3d4-0000-0000-0000-000000000001)? Show me what's different."},{"title":"Product availability monitoring","prompt":"Check https://shop.example.com/product/limited-edition-sneaker right now and compare it to my stored snapshot b9e8f7a6-1111-2222-3333-444455556666 — I want to know if the stock status or price has changed."},{"title":"News article edit detection","prompt":"I saved a snapshot of this article last week — can you check https://news.example.com/article/story-123 against baseline ID d4e5f6a7-aaaa-bbbb-cccc-ddddeeee0000 to see if the text has been quietly updated or corrected?"}],"resultDescription":"Returns a JSON object with a boolean 'changed' flag, a content hash of the current page, the new snapshot ID, a creation timestamp, optional diff details in 'changes', and the baseline snapshot metadata for comparison.","failureModes":["URL is not publicly reachable (returns error or empty snapshot)","Invalid or mismatched baselineId UUID causes comparison failure","Dynamically rendered JavaScript pages may yield unreliable content hashes","Rate limiting or payment failure via x402 blocks the request","URL exceeds 2048-character limit returns validation error","Paywalled or bot-protected pages may return blocked/empty content"],"whenToPreferThis":"Use this endpoint when you need lightweight, pay-per-call website change detection without committing to a subscription monitoring service. Ideal for autonomous agents that need to check a specific URL on demand, compare against a stored baseline, and get a clear changed/unchanged signal with a content hash. Prefer this over full web-scraping endpoints when your goal is purely detecting mutations rather than extracting structured data.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T12:38:18.179Z","isFirstParty":false,"canonicalSlug":"agent-market-lab-website-change-check-52e4b70c"}