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Forest Commerce - Product Change Detection
x402
Forest Commerce - Product Change Detection is a paid API for AI agents from http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-29).
Detects material changes in a public product page (price, availability, variant, or seller) using a deterministic SHA-256 hash, excluding noise like timestamps and analytics.
Price / call$0.001
Success—
StatusUnknown
How this service works
Cheaply detect material public product changes in price, availability, selected variant or seller using a deterministic hash. Timestamps, images and analytics noise are excluded. Base mainnet USDC
Output
Returns a boolean indicating whether a material change was detected, the new deterministic SHA-256 hash of the normalized product state, and details about which fields changed (price, availability, variant, seller). Timestamps, images, and analytics noise are excluded from the hash computation.
Example use cases
Price drop alert for electronics
“Has the price or availability changed on https://www.amazon.com/dp/B09XYZ1234 since my last check? My previous hash was sha256:deadbeef1234567890abcdef1234567890abcdef1234567890abcdef12345678.”
Restock monitoring for sold-out item
“I want to know if this product is back in stock — check https://www.nike.com/product/air-max-2024 for any material changes and compare it to my stored hash sha256:cafebabe0000111122223333444455556666777788889999aaaabbbbccccdddd.”
Seller change detection on marketplace listing
“Can you check whether the seller or price has changed on this marketplace listing https://www.walmart.com/ip/98765432 since my previous hash was sha256:f0f0f0f0a1a1a1a1b2b2b2b2c3c3c3c3d4d4d4d4e5e5e5e5f6f6f6f6a7a7a7a7?”
Technical details
Endpoint
POSThttps://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/commerce/changed?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need lightweight, noise-free change detection on a specific public product URL and already have a previous hash to compare against. It is ideal for polling loops, price-drop alerts, restock monitors, and seller-change detection where you want to avoid false positives from analytics, timestamps, or image URL rotations. Prefer it over full scraping endpoints when you only need to know *if* something changed, not extract all product data fresh every time.
Side effects
- URL is not a recognized product page — returns error or empty change data
- Product page behind login/paywall — cannot access content
- URL returns non-200 status — fetch fails with origin error
- Previous hash format invalid — validation error on sha256: pattern
- Product page uses heavy JavaScript rendering — static fetch may miss dynamic content
- Rate limiting or bot detection by the commerce site — request blocked
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | Public HTTP(S) URL to inspect, resolve, or compare. |
| previous_hash | string | Earlier result hash used to detect a material change. |
Tags
x402
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