{"uid":"cap_Jwyx9Yn6vIbnymPD9cLKy","slug":"extract-h3-as-json-change-watch-3c5bd38e","name":"Extract H3 As JSON Change Watch","description":"Change watch for extract h3 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. $0.02 per check.","url":"https://page.intel.rallylive.ca/watch/page/h3/json?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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_aOJ2jxkOy_UDs5smljiFg","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 webpage's H3 headings for changes and returns current values, a changed flag, before/after diffs, and last-seen timestamp.","exampleAgentPrompt":"Keep an eye on https://example.com for me — let me know if any of the H3 headings change compared to when you last checked, and show me exactly what changed with the before and after text.","exampleUseCases":[{"title":"Track competitor page section changes","prompt":"Watch https://competitor.com/pricing for me and tell me if any of the H3 section headings change — I want to see exactly what the old text was versus the new text."},{"title":"Monitor news site topic headings","prompt":"Check https://news.example.com for me and let me know if the H3 headings have changed since you last looked — flag it as changed or not and show me what's different."},{"title":"Alert on product page restructuring","prompt":"I need to know if https://store.example.com/products has updated any of its H3 subheadings since our last check — pull the current ones and compare them to the previous snapshot."}],"resultDescription":"Returns a JSON object containing the current H3 headings extracted from the target page, a boolean 'changed' flag indicating whether anything differs from the cached result (stored up to 90 days), a list of fields that changed with explicit before and after values, and a timestamp of when the page state was last observed.","failureModes":["No previous snapshot exists (first call returns current state with changed=false or null baseline)","Target URL is unreachable or returns an error, resulting in a failed check","Cached result has expired after 90 days, losing comparison baseline","Target page requires authentication, blocking H3 extraction","Network timeout or rate limiting on the target domain","Payment of $0.02 USDC not fulfilled, blocking the request"],"whenToPreferThis":"Choose this endpoint when you need to detect whether H3 headings on a specific webpage have changed over time, rather than just extracting the current headings. It is ideal for scheduled monitoring, alerting pipelines, and change-diff workflows where you need explicit before/after comparison rather than a raw snapshot. Use the bulk or non-watch siblings if you just need the current H3 content without change tracking.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-20T18:57:05.964Z","isFirstParty":false,"canonicalSlug":"extract-h3-as-json-change-watch-3c5bd38e"}