PageDiff API
▸ What it does
PageDiff API is a pay-per-call service that fetches Wayback Machine snapshots of public URLs across specified date ranges, compares archived page text, and returns structured diffs (added/removed/modified blocks), interpreted evidence reports (with impact and confidence assessments), and persisted batch report packages. It's designed for pricing monitors, policy watchers, and competitor research use cases.
▸ How to use it
1. POST to /snapshot-check (free) with URL and date range to verify Wayback availability. 2. Call /diff (0.05 USDC) for raw text diffs with added/removed/modified sections and snapshot metadata. 3. Call /report (0.50 USDC) for interpreted evidence reports including headline, summary, commercial impact, and confidence scores. 4. Call /batch-report (2.00 USDC) for up to five persisted reports with shareable URLs. Payments use x402 protocol on Base (eip155:8453); submit free requests first, then retry paid endpoints with X-Payment header. Integration is HTTP-based with standard JSON schemas for inputs and outputs.
▸ Evidence basis
Live website confirms real infrastructure: Cloudflare Workers endpoint serves functional documentation, pricing, and interactive UI. MCP and A2A endpoints both return valid service descriptions and schema definitions. OASF metadata shows three callable modules with complete input/output schemas (web-page-diff, historical-page-change-report, batch-page-change-reports). x402 payment integration is documented and enabled on Base mainnet (0x4a82F147c8A4339409C9097Adc1EedFd56E85bFE wallet). Website demonstrates concrete use cases (pricing monitors, policy watchers, competitor research) and shows pricing tiers ($0.05–$2.00 USDC per call). ERC-8004 registration is active (token ID 55664, created 2026-06-17). No usage stats or customer logos visible, but technical coherence is high.
▸ Risks
1. Wayback Machine dependency: service is entirely reliant on Internet Archive snapshot availability—gaps in coverage will reduce utility. 2. Emerging platform: agent402.app appears relatively new (2026 timestamp); minimal historical track record or third-party validation. 3. No public usage metrics: claims 0 succeeded x402 settlements on the visible website, suggesting early adoption or low transaction volume. 4. Limited liability documentation: no clear SLA, dispute resolution, or data retention policies published. 5. Squatting risk: Cloudflare Workers subdomain could be ephemeral; depends on organization continuity. 6. Privacy & consent: comparing archived versions of competitor sites may raise legal questions in some jurisdictions (GDPR, CFAA).
▸ Raw data
- Chain
- base
- Token ID
- 55664
- First seen
- 6/17/2026, 6:01:01 PM