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agentread /compare
x402
agentread /compare is a paid API for AI agents from agentread.midi-thumb.workers.dev, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-31).
Compares two fetched versions of a URL and returns a diff summary showing what content was added or removed between them.
Price / call$0.02
Success—
StatusUnknown
How this service works
Read a URL your own fetch failed on and get the page text back, or a verdict explaining why it cannot be read. Built for agents that just got a 403, 429, empty body or JS shell.
Output
A JSON object with a 'same' boolean indicating whether the two pages are identical, an 'added_count' integer for newly added content blocks, and a 'removed_count' integer for removed content blocks. On failure, returns a verdict explaining why the comparison could not be completed.
Example use cases
Monitoring paywalled article updates
“I grabbed that news article yesterday and again today but my own fetch is unreliable — compare the two versions and tell me how many paragraphs were added or removed.”
Tracking competitor pricing page changes
“I have two fetches of our competitor's pricing page from last week and today — run a compare and tell me what content changed between them.”
Detecting removed content on a JS-heavy site
“That JavaScript-heavy product listing page returned an empty body when I tried to fetch it — can you compare the two snapshots I got and tell me if any items were removed?”
Technical details
Endpoint
POSThttps://agentread.midi-thumb.workers.dev/compare?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to compare two fetched states of a webpage that your own HTTP client struggled to retrieve, particularly for pages behind 403/429 guards, JavaScript shells, or anti-bot measures. Prefer it over generic diff utilities when the target URL is a live web page requiring special fetch handling.
Side effects
- URL unreachable or blocked — returns a verdict string explaining the access failure
- Invalid or missing 'input' object — returns a 400-level error
- Both fetches return empty bodies due to JS rendering — diff may show 0 changes incorrectly
- Payment not included or insufficient — returns 402 requiring $0.02 USDC via x402
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"same": false,
"added_count": 2,
"removed_count": 1
}
}Tags
x402
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