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PageDiff API - Batch Historical Page-Change Report
x402
PageDiff API - Batch Historical Page-Change Report is a paid API for AI agents from pagediff-api.hahavoid0.workers.dev, paid per call via x402, $2/call, status unknown (last checked 2026-09-14).
Fetches and compares Wayback Machine snapshots of up to 5 URLs across date ranges, returning structured change reports with summaries, risk notes, commercial impact, and source timestamps.
Price / call$2
Success—
StatusUnknown
How this service works
Pay-per-call historical page-change evidence for AI agents. Check Wayback snapshot availability, compare archived pages, and generate structured reports with important changes, impact, risks, and source timestamps.
Output
Returns a batch of structured change reports — one per URL — each including: a headline and summary of detected changes, counts of added/removed/modified text blocks, the actual Wayback archive URLs used, a confidence level, risk caveats, commercial impact observations, and a recommended next action. Also includes a batch-level JSON URL for full detail.
Example use cases
Example prompt
“Can you pull a pricing intelligence report comparing Stripe's pricing page from January 1 2023 to January 1 2024, and also check Twilio's pricing page over the same period — I want to know what changed, what was added or removed, and any commercial impact notes.”
Technical details
Endpoint
GEThttps://pagediff-api.hahavoid0.workers.dev/batch-reportWhen to prefer
Use this endpoint when you need historical evidence of what changed on a specific web page between two known dates — especially for pricing intelligence, policy tracking, legal terms audits, or competitive positioning research. Prefer it over live scraping when you need a point-in-time comparison backed by archived source timestamps. Best when Wayback Machine coverage of the target domain is known to be good.
Side effects
- Wayback Machine has no snapshot near the requested date — snapshot not found or falls back to nearest available
- Target page was JavaScript-rendered or authenticated, resulting in incomplete or missing content
- Low confidence score due to sparse archiving of the target URL
- URL unreachable in archive — appears in failures array with reason
- Rate or batch limit exceeded (maxItems is 5)
- Network timeout reaching the Wayback Machine CDX or content endpoints
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| items | array | |
| report_type | string |
Output
Schema · Response
{
"type": "json",
"example": {
"reports": [
{
"url": "https://example.com/",
"summary": "Compared 20230101000000 to 20240101000000. Change level: low. Added: 1. Removed: 1. Modified: 0.",
"headline": "2 archived text changes detected for pricing intelligence.",
"json_url": "https://pagediff-api.hahavoid0.workers.dev/reports/r_example.json",
"report_id": "r_example",
"confidence": "medium",
"report_url": "https://pagediff-api.hahavoid0.workers.dev/reports/r_example",
"risk_notes": [
"Results depend on Internet Archive snapshot availability and quality.",
"JavaScript-rendered, authenticated, or poorly archived content may be incomplete.",
"This report is machine-generated evidence triage, not legal advice or certified web capture."
],
"next_action": "Review the source snapshots, then run /report on adjacent dates or related pages to isolate when the change first appeared.",
"report_type": "pricing_intelligence",
"diff_summary": {
"added_count": 1,
"change_level": "low",
"removed_count": 1,
"modified_count": 0
},
"source_snapshots": {
"to": {
"digest": "EXAMPLE2",
"mimetype": "text/html",
"timestamp": "20240101000000",
"statuscode": "200",
"archive_url": "https://web.archive.org/web/20240101000000id_/https://example.com/",
"original_url": "https://example.com/",
"requested_date": "2024-01-01"
},
"from": {
"digest": "EXAMPLE",
"mimetype": "text/html",
"timestamp": "20230101000000",
"statuscode": "200",
"archive_url": "https://web.archive.org/web/20230101000000id_/https://example.com/",
"original_url": "https://example.com/",
"requested_date": "2023-01-01"
}
},
"commercial_impact": [
"Review packaging, limits, trial language, and enterprise call-to-action changes before updating competitive positioning.",
"If pricing language changed, treat this as a signal to inspect sales motion, margin pressure, or segmentation changes."
],
"important_changes": [
"Added: Updated example page content.",
"Removed: Original example page content."
]
}
],
"batch_id": "b_example",
"failures": [],
"json_url": "https://pagediff-api.hahavoid0.workers.dev/batches/b_example.json",
"batch_url": "https://pagediff-api.hahavoid0.workers.dev/batches/b_example",
"report_count": 1
}
}Tags
x402
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