A lightweight, non-iatrogenic delta-monitoring tool that tracks precise changes in price, inventory, additions, and removals across any public Shopify catalog. By using the raw /products.json endpoint, it operates with structural efficiency, bypassing standard browser anti-bot friction.

Unlike traditional scrapers that dump full catalog snapshots (forcing you to process megabytes of unchanged data), this Actor stores the previous run's baseline internally. It outputs only the modifications (deltas) detected between runs.

This Actor uses the Pay-Per-Event (PPE) pricing model. You only pay for infrastructure initialization and actual data mutations.

• Actor Start (apify-actor-start): $0.01 per run (Covers boot compute and initial endpoint handshake).
• Per Result Transmitted (apify-default-dataset-item): $0.005 per detected product delta (price change, stock modification, new release, or deletion).

• Run on an unchanged store: 1 Start Event = $0.01 total.
• Run tracking 20 price drops / re-stocks: 1 Start Event ($0.01) + 20 Item Events ($0.10) = $0.11 total.

• Rate Limits: Large catalogs (>10K items) are requested sequentially at a protective rate of 2 pages/sec to guarantee long-term endpoint viability and prevent Shopify HTTP 429 blocks.
• Integrity Gate: If a store responds with an unrecoverable network failure mid-stream, the Actor executes a graceful abort. Your previous baseline state remains untouched, and zero data changes are written to the dataset, protecting you from accidental PPE overcharging due to partial scrapes.