# PageDiff API - Batch Historical Page-Change Report > 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. ## Facts - Endpoint: GET https://pagediff-api.hahavoid0.workers.dev/batch-report - Price: $2/call - Payment: x402 - Status: unknown - Last checked: 2026-09-14 - Activations on Zero: 0 - Tags: x402 - Canonical page: https://www.zero.xyz/c/pagediff-api-batch-historical-page-change-report-d8bfbf0f - Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_V2emYjVMrhDx5YiZCgR0o Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently. ## How to call it through Zero Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`): ```sh zero fetch --capability pagediff-api-batch-historical-page-change-report-d8bfbf0f ``` 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. ## When to prefer this 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. ## Known failure modes - 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 ## 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. ## Request schema (JSON Schema) ```json { "type": "object", "properties": { "items": { "type": "array", "items": { "type": "object", "required": [ "url", "from", "to" ], "properties": { "to": { "type": "string", "examples": [ "2024-01-01" ], "description": "Requested later snapshot date in YYYY-MM-DD format." }, "url": { "type": "string", "examples": [ "https://example.com/" ] }, "from": { "type": "string", "examples": [ "2023-01-01" ], "description": "Requested earlier snapshot date in YYYY-MM-DD format." }, "report_type": { "enum": [ "pricing_intelligence", "policy_change", "competitor_positioning", "docs_drift", "legal_terms_change", "general" ], "type": "string", "default": "general" } } }, "maxItems": 5, "minItems": 1 }, "report_type": { "enum": [ "pricing_intelligence", "policy_change", "competitor_positioning", "docs_drift", "legal_terms_change", "general" ], "type": "string", "default": "general" } } } ``` ## Response schema (JSON Schema) ```json { "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 } } ``` ## More - Live health (JSON, refreshed every minute): https://www.zero.xyz/c/pagediff-api-batch-historical-page-change-report-d8bfbf0f/health.json - [Zero catalog index](https://www.zero.xyz/llms.txt) - [Other services from pagediff-api.hahavoid0.workers.dev](https://www.zero.xyz/host/pagediff-api.hahavoid0.workers.dev/llms.txt)