{"uid":"cap_EoEeqUJlkXaEJkqaSlMZI","slug":"extract-main-as-json-watch-41cafccf","name":"extract-main-as-json-watch","description":"Change watch for extract main as json: runs the check, compares it with the result from your previous call for the same url (kept 90 days) and returns the current answer, changed true/false, the fields that changed with before/after values, and when it was last seen. Schedule it to be alerted when this changes. $0.02 per check.","url":"https://page.intel.rallylive.ca/watch/page/main/json?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","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":"$0.02/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_mLBGR7noAE3WvVmN3d5Fh","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Monitors a web page's main content (as JSON) for changes, returning a diff with before/after values and a changed flag on each call","exampleAgentPrompt":"Keep an eye on the main content section of https://example.com/products for me — let me know whether anything has changed since the last time you checked, and show me exactly what's different with the before and after values.","exampleUseCases":[{"title":"Competitor pricing page watch","prompt":"Watch the main content of https://competitor.com/pricing — has anything changed since last time? Show me which fields changed and what the old vs new values are."},{"title":"News article content drift detection","prompt":"Check the main section of https://news-site.com/article/123 and tell me if the story has been updated since you last checked it — I want to see exactly what was added or removed."},{"title":"Scheduled regulatory page monitor","prompt":"Monitor the main content of https://regulator.gov/notices for any changes — flag it as changed or unchanged and tell me when it was last seen in its previous state."}],"resultDescription":"Returns the current extracted main-element content as JSON, a boolean 'changed' flag indicating whether it differs from the last call for the same URL (stored for 90 days), a list of fields that changed with their before and after values, and a timestamp of when the content was last seen in its prior state.","failureModes":["URL is unreachable or returns a non-200 status — returns an error with no content","No previous snapshot exists (first call) — returns current content with changed=false and no diff","Snapshot older than 90 days has been purged — treated as a first call with no diff available","Page has no identifiable main element — returns empty or null content","Rate limiting or payment failure — call is rejected before check is performed"],"whenToPreferThis":"Choose this endpoint when you need to detect and diff changes in a web page's main content area specifically in JSON format, and want persistent snapshot comparison (up to 90 days of history) without managing your own storage. It is ideal for scheduled agent workflows that need to react to content updates — prefer it over a plain extraction endpoint when the goal is change alerting rather than one-off retrieval, and over general-purpose web monitors when you need structured JSON diffs of the main element specifically.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-20T18:57:01.451Z","isFirstParty":false,"canonicalSlug":"extract-main-as-json-watch-41cafccf"}