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Forest Commerce – Marketplace Listing Change Detector
x402
Forest Commerce – Marketplace Listing Change Detector 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 2026-10-02).
Detects material changes in a public marketplace listing (active state, price, seller, condition, or quantity) using a deterministic SHA-256 hash comparison.
Price / call$0.001
Success—
StatusUnknown
How this service works
Detect material marketplace listing changes in active state, price, seller, condition or quantity with a deterministic hash. It does not place bids, purchases or infer hidden listing facts. Base mainnet USDC
Output
Returns a deterministic SHA-256 hash of the current material listing state, plus a boolean or signal indicating whether a material change was detected relative to the provided previous hash. The result covers observable fields: active/inactive status, price, seller identity, item condition, and quantity. It does not place bids, make purchases, or infer hidden listing data.
Example use cases
Price drop alert on resale item
“Keep an eye on this StockX listing at https://stockx.com/product/example-sneaker — has anything changed since my last snapshot with hash sha256:b7e3a1c2d4f0...9e? I want to know if the price or condition has shifted.”
Sold-out or delisted product check
“I need to know if this Etsy listing at https://www.etsy.com/listing/987654321 is still active — compare it to my previous hash sha256:c9f2b4e1a7d3...2b and flag if it's been removed or the seller changed.”
Competitor listing surveillance
“Check this competitor's product listing at https://www.mercari.com/item/m12345678 and tell me if the price, quantity, or condition has changed compared to my earlier hash sha256:d4a8c3f7b2e1...5a.”
Technical details
Endpoint
POSThttps://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/marketplace/listing-changed?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a cheap, deterministic watchdog to detect whether a specific public marketplace listing has materially changed — especially for price, seller, condition, quantity, or active state. Prefer it over full-page scrapers when you only need a yes/no change signal against a known previous hash, not full structured data extraction. It is not suitable for placing bids, making purchases, or accessing listings behind authentication.
Side effects
- URL is not a publicly accessible marketplace listing (returns error or no data)
- Previous hash format is invalid or does not match expected sha256: prefix pattern
- Listing page requires login or is behind a CAPTCHA (cannot be resolved)
- Listing URL returns a non-200 HTTP status (e.g. 404 if already removed)
- Hash comparison finds no previous baseline, so change detection is inconclusive
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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