{"uid":"cap_tJKeuTzbyxCK-GLG-7FD7","slug":"autogrok-desk-watch-once-url-change-detection-c0802002","name":"AUTOGROK Desk — Watch Once (URL Change Detection)","description":"Paid micro-jobs for AI agents and people: URL probe, page extract, watch once, JSON shape, researched brief. Pay per call with x402 (USDC on Base) or with prepaid card packs (Stripe MPP).","url":"https://desk.grokaiapps.com/v1/jobs/watch-once?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"url":{"type":"string","format":"uri","description":"Public http(s) URL to hash"},"previous_hash":{"type":"string","description":"Prior sha256 hex; omit for baseline (changed=null)"}}},"responseSchema":{"type":"json","example":{"url":"https://example.com/","hash":"ab12cd34ef567890ab12cd34ef567890ab12cd34ef567890ab12cd34ef567890","changed":true,"fetched_at":"2026-09-21T20:00:00.000Z","word_count":42,"previous_hash":"e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.1","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":"$0.1/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.1","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.1","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_hGxxngR9Sxx1ngQhUOzs1","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.1","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Fetches a URL, computes a SHA-256 hash of its content, and reports whether it has changed since a previous hash was provided.","exampleAgentPrompt":"Check if https://example.com/pricing has changed since my last snapshot — my previous hash was ab12cd34ef567890ab12cd34ef567890ab12cd34ef567890ab12cd34ef567890.","exampleUseCases":[{"title":"Baseline snapshot of new URL","prompt":"I want to start tracking https://docs.openai.com/changelog for updates — fetch it now and give me a baseline hash so I can compare against it later."},{"title":"One-time change check on pricing page","prompt":"Has https://stripe.com/pricing changed since I last checked? My previous hash was e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855 — just do a single check now."},{"title":"Verify article hasn't been edited","prompt":"Can you confirm whether https://techcrunch.com/2024/01/15/some-article has been modified? The hash I recorded when I first read it was ab12cd34ef567890ab12cd34ef567890ab12cd34ef567890ab12cd34ef567890."}],"resultDescription":"Returns a JSON object with the current SHA-256 hash of the page content, a boolean 'changed' flag (null if no previous_hash was supplied), the UTC timestamp of the fetch, a word count of the page, and the previous hash for reference.","failureModes":["URL is unreachable or returns non-200 status — fetch fails with an error","URL is behind authentication or a paywall — content may be incomplete or inaccessible","Previous hash format is invalid (not a 64-character hex string) — validation error","URL resolves to dynamic/JS-rendered content — hash may differ each fetch even without meaningful changes","Rate limit or payment failure — 402 or 429 response"],"whenToPreferThis":"Use this endpoint when you need a single, lightweight check of whether a URL's content has changed, without storing state server-side. It is ideal for spot-checks, one-shot monitoring, or building your own change-detection loop where you manage the previous hash. Prefer it over full-page extraction endpoints when you only need a change signal, not the content itself.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-11T12:44:20.923Z","isFirstParty":false,"canonicalSlug":"autogrok-desk-watch-once-url-change-detection-c0802002"}