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AUTOGROK Desk — Watch Once (URL Change Detection)
x402
AUTOGROK Desk — Watch Once (URL Change Detection) is a paid API for AI agents from desk.grokaiapps.com, paid per call via x402, $0.1/call, status unknown (last checked 2026-10-11).
Fetches a URL, computes a SHA-256 hash of its content, and reports whether it has changed since a previous hash was provided.
Price / call$0.1
Success—
StatusUnknown
How this service works
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).
Output
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.
Example use cases
Baseline snapshot of new URL
“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.”
One-time change check on pricing page
“Has https://stripe.com/pricing changed since I last checked? My previous hash was e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855 — just do a single check now.”
Verify article hasn't been edited
“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.”
Technical details
Endpoint
POSThttps://desk.grokaiapps.com/v1/jobs/watch-once?utm_source=zero.xyzWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | Public http(s) URL to hash |
| previous_hash | string | Prior sha256 hex; omit for baseline (changed=null) |
Output
Schema · Response
{
"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"
}
}Tags
x402
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