{"uid":"cap_3s-71uQViapCn6f6OqCf2","slug":"web-evidence-capture-change-detection-589436e7","name":"Web Evidence Capture & Change Detection","description":"Website hosted for free through pinggy.io>\n    <meta name=","url":"https://gvfcs-159-89-4-32.free.pinggy.net/evidence?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","required":["url"],"properties":{"url":{"type":"string","description":"http(s) URL to capture evidence for"}}},"responseSchema":{"type":"object","required":["url","contentSha256"],"properties":{"url":{"type":"string"},"bytes":{"type":"integer"},"title":{"type":"string"},"receipt":{"type":"object"},"finalUrl":{"type":"string"},"httpStatus":{"type":"integer"},"linksSample":{"type":"array","items":{"type":"string"}},"contentSha256":{"type":"string"},"changeDetection":{"type":"object"}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"down","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm__avDph4rEjWRxciQLejtw","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Fetches a URL and returns a cryptographic content hash, HTTP metadata, page title, sampled links, and change detection data as tamper-evident evidence","exampleAgentPrompt":"Can you capture evidence of what's currently on https://example.com/terms-of-service — I need the content hash, HTTP status, page title, and any detected changes from the last snapshot so I have a verifiable record.","exampleUseCases":[{"title":"Legal proof of webpage content","prompt":"I need tamper-evident evidence of what https://competitor.com/pricing shows right now — get me the content hash, HTTP status, and page title so I can document it for a legal dispute."},{"title":"Monitor terms-of-service changes","prompt":"Check https://myvendor.com/tos for any content changes since the last time it was captured, and give me the SHA-256 hash so I can verify if anything was modified."},{"title":"Verify a URL redirects correctly","prompt":"Fetch https://old-domain.com/promo and tell me the final URL it lands on, the HTTP status code, and the content hash — I need to confirm the redirect is working and the destination page is unchanged."}],"resultDescription":"Returns the original URL, final URL after redirects, HTTP status code, page title, content size in bytes, SHA-256 hash of the page content, a sample of links found on the page, change detection metadata comparing to prior snapshots, and a payment receipt.","failureModes":["Target URL is unreachable or times out — returns error with no content hash","URL returns non-200 HTTP status (e.g. 404, 500) — httpStatus field reflects actual code, content may be empty","Redirect loop detected — finalUrl may differ or request fails","Invalid or malformed URL input — returns validation error","Tunnel host (pinggy.io) may be intermittently unavailable — service disruption possible"],"whenToPreferThis":"Choose this endpoint when you need a lightweight, cryptographically verifiable snapshot of a webpage — especially for compliance, legal evidence, or change-detection workflows — rather than a full browser-rendered scrape. Ideal when you need the SHA-256 hash as proof of content state, HTTP metadata, and redirect tracing in a single call at minimal cost ($0.005 per call).","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-13T00:28:09.213Z","isFirstParty":false,"canonicalSlug":"web-evidence-capture-change-detection-589436e7"}