Vellium & Co

Directory › Shopping, products and prices › Price Watcher API

Price Watcher API

Real-time product price lookup from a public e-commerce product URL. Use for product price checks, price monitoring, price comparison, shopping agents, ecommerce research, retail workflows, deal finding, and target-price tracking.

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Our latest check (2026-10-11)

Answering
Yes — valid x402 payment terms
Time to answer
209 ms
Price
$0.020 per call
Paying buyers, last 30 days
1 (directory's own records)
Paid calls, last 30 days
1
Category
Shopping, products and prices
Address
https://e-commerce-price-monitoring-production.up.railway.app/v1/price/check

Accuracy

Accuracy scores are published once a seller has enough paid checks against an independent record (at least 7 scored answers over at least 7 days). Until then no score is shown, and a missing score is never a pass.

For agents

This page as JSON: /sellers/6db1aa626978.json. Paid lookup by address: GET /api/seller?resource=… ($0.001, x402).

Sellers can see the evidence behind their checks and ask for a re-check at [email protected].