{"uid":"cap_rDf7U8T1mcQ4UynBzWJAD","slug":"agent-fetch-hub-diff-endpoint-web-page-change-detection-2292b272","name":"Agent Fetch Hub — Diff Endpoint (Web Page Change Detection)","description":"URL in, clean Markdown out. Pay per call in USDC over x402. No signup, no API key.","url":"https://fetch.netzhandwerker.de/diff","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"url":{"type":"string","format":"uri","description":"Page to fetch and compare against its last stored state."},"after":{"type":"string","description":"Later document as HTML or Markdown."},"since":{"type":"string","format":"date-time","description":"ISO timestamp. Picks the stored state at or before this moment instead of the newest one."},"before":{"type":"string","description":"Earlier document as HTML or Markdown. No network access is used."},"after_fetched_at":{"type":"string","format":"date-time","description":"Optional, echoed back for inline comparisons."},"before_fetched_at":{"type":"string","format":"date-time","description":"Optional, echoed back for inline comparisons."}}},"responseSchema":{"type":"json","example":{"ok":true}},"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_Pl3WdtWDX_uQyrjDfUgmB","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":"Fetches a URL and returns a diff or change-detection result as clean Markdown, paid per-call in USDC over x402 with no signup required.","exampleAgentPrompt":"Can you check https://example.com/pricing and give me a diff showing what's changed on that page — I want to see any content differences detected?","exampleUseCases":[{"title":"Monitor competitor pricing page","prompt":"Fetch https://competitor.com/pricing and give me a diff report showing anything that's changed on that page — flag any price or plan updates."},{"title":"Track government policy updates","prompt":"Check https://agency.gov/regulations/2024 and show me a diff of what's different on that page compared to before — I need to know if any rules were added or removed."},{"title":"Verify article edits after publishing","prompt":"Pull a diff for https://techblog.com/my-article and tell me if the published content has been modified since it went live."}],"resultDescription":"A JSON response with an 'ok' boolean and diff/change-detection data showing what content on the target URL has changed, returned as structured JSON (potentially including Markdown-formatted diff content).","failureModes":["Invalid or unreachable URL returns an error response","Payment failure via x402 protocol blocks the request","Rate limiting if too many calls are made in quick succession","Pages behind authentication or CAPTCHAs may not be accessible","Empty diff if no changes are detected or no baseline exists"],"whenToPreferThis":"Choose this endpoint when you need to detect or compare changes on a specific web page without any signup or API key, and you want to pay only per successful call in USDC. It is ideal for agents that need lightweight, on-demand change detection on arbitrary URLs without maintaining a subscription or credentials.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:37:52.264Z","isFirstParty":false}