{"uid":"cap_3ByrEnikpj8pGrVDbiGpx","slug":"public-data-monitor-baseline-change-report-d2f838f2","name":"Public Data Monitor – Baseline & Change Report","description":"Create a public-data baseline or receive a sourced, timestamped and cryptographically hashed change report.","url":"https://9dmb38pvlp8dr1d3rtfjpe934o.ingress.h4i-dedicated.eu-sw-2.digitalfrontier.so/api/seller/v3/public-data-monitor","method":"POST","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.05","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":"$0.05/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_g2KUpgrPTVDPmlAfLlaNa","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.05","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Creates a cryptographically hashed baseline snapshot of a public URL or returns a sourced, timestamped, hash-verified change report since the last baseline.","exampleAgentPrompt":"Create a baseline snapshot of https://www.sec.gov/rules/proposed.shtml right now, and then check back in an hour to give me a cryptographically hashed change report showing exactly what was added or removed.","exampleUseCases":[{"title":"Regulatory page change audit","prompt":"Set up a tamper-evident baseline on https://www.fda.gov/safety/recalls-market-withdrawals-safety-alerts and then run a change report against it — I need a timestamped, SHA-256-hashed diff I can use as evidence if anything was quietly updated."},{"title":"Public pricing page monitoring","prompt":"Baseline our competitor's public pricing page at https://competitor.com/pricing right now, and give me a sourced change report the next time I call so I can see exactly what text was added, removed, or changed, with cryptographic proof."},{"title":"Government dataset version tracking","prompt":"Create a baseline of the public CSV at https://data.cityofnewyork.us/api/views/abc123/rows.csv and then generate a change report showing any row-level additions or removals since that baseline, with hashes so I can verify the evidence."}],"resultDescription":"Returns either (a) a baseline record containing a timestamped SHA-256 hash of the current state of the public URL, plus a credential token for future change checks, or (b) a change report containing sourced before/after evidence of what changed, a timestamp of when the change was detected, and cryptographic hashes verifying the integrity of both the old and new states.","failureModes":["URL is not publicly accessible — returns error indicating the resource could not be fetched","Invalid or expired baseline credential — change report cannot be generated without a valid prior baseline","Non-HTTPS or private URL provided — endpoint only supports public HTTPS sources","Rate limit or payment failure — $0.05 USDC per call; insufficient payment returns 402","Target page returns non-200 status — baseline or diff cannot be captured","Content type not supported — binary or unsupported MIME types may not be processable"],"whenToPreferThis":"Choose this endpoint when you need cryptographically verifiable, auditable evidence of what a public webpage or dataset contained at a specific point in time, or exactly what changed between two points — particularly for compliance, legal, regulatory, or investigative use cases where a simple screenshot is insufficient. Prefer this over generic web scraping when tamper-evident hashing and sourced change provenance are required.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T06:40:07.467Z","isFirstParty":false}