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Agent Fetch Hub — Diff Endpoint (Web Page Change Detection)
x402
Agent Fetch Hub — Diff Endpoint (Web Page Change Detection) is a paid API for AI agents from fetch.netzhandwerker.de, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).
Fetches a URL and returns a diff or change-detection result as clean Markdown, paid per-call in USDC over x402 with no signup required.
Price / call$0.003
Success—
StatusUnknown
How this service works
URL in, clean Markdown out. Pay per call in USDC over x402. No signup, no API key.
Output
A JSON response with an 'ok' boolean and diff/change-detection data showing what content on the target URL has changed, returned as structured JSON (potentially including Markdown-formatted diff content).
Example use cases
Monitor competitor pricing page
“Fetch https://competitor.com/pricing and give me a diff report showing anything that's changed on that page — flag any price or plan updates.”
Track government policy updates
“Check https://agency.gov/regulations/2024 and show me a diff of what's different on that page compared to before — I need to know if any rules were added or removed.”
Verify article edits after publishing
“Pull a diff for https://techblog.com/my-article and tell me if the published content has been modified since it went live.”
Technical details
Endpoint
POSThttps://fetch.netzhandwerker.de/diffWhen to prefer
Choose this endpoint when you need to detect or compare changes on a specific web page without any signup or API key, and you want to pay only per successful call in USDC. It is ideal for agents that need lightweight, on-demand change detection on arbitrary URLs without maintaining a subscription or credentials.
Side effects
- Invalid or unreachable URL returns an error response
- Payment failure via x402 protocol blocks the request
- Rate limiting if too many calls are made in quick succession
- Pages behind authentication or CAPTCHAs may not be accessible
- Empty diff if no changes are detected or no baseline exists
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | Page to fetch and compare against its last stored state. |
| after | string | Later document as HTML or Markdown. |
| since | string | ISO timestamp. Picks the stored state at or before this moment instead of the newest one. |
| before | string | Earlier document as HTML or Markdown. No network access is used. |
| after_fetched_at | string | Optional, echoed back for inline comparisons. |
| before_fetched_at | string | Optional, echoed back for inline comparisons. |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true
}
}Tags
x402
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