Steam Game Price Tracker & Deal Monitor

Track current and original Steam game prices, discount percentages, sale status, currency, and free-to-play status for a supplied list of app IDs. Each run emits timestamped, deduplicated snapshots for game-deal newsletters, price dashboards, catalog checks, and scheduled monitoring.

This Actor uses Steam's publicly accessible Store app-details endpoint. It returns snapshots—not price history, automatic alerts, review data, or regional comparisons—and skips unavailable or invalid apps without emitting a paid result.

Built for

• Game-deal newsletters and scheduled deal-alert pipelines

• Catalog and storefront price checks

• Dashboards that upsert the latest snapshot by dedupeKey

Why this instead of a raw Steam response

The Actor validates app availability, normalizes integer cents into currency amounts, rejects oversized responses, skips unavailable apps instead of charging for them, and emits a compact typed record rather than Steam's much larger app payload.

Input

{
  "appIds": [730, 570, 440],
  "maxItems": 25,
  "requestTimeoutSecs": 30
}

Paid result

{
  "appId": 730,
  "name": "Example Game",
  "isAvailable": true,
  "isFree": false,
  "onSale": true,
  "currency": "USD",
  "initialPrice": 19.99,
  "finalPrice": 9.99,
  "discountPercent": 50,
  "sourceUrl": "https://store.steampowered.com/app/730",
  "detectedAt": "2026-08-26T12:00:00.000Z",
  "dedupeKey": "steam|730"
}

The example illustrates the schema; prices change and must be read from the current run.

Limits and source behavior

• Uses Steam's public app-details endpoint; it does not log in, purchase games, or bypass access controls.
• App IDs must be positive JavaScript safe integers.
• This Actor emits snapshots, not persistent change events. Schedule it and upsert by dedupeKey to compare snapshots from separate runs.
• Responses are capped at 2 MB per app and malformed, unavailable, non-successful, or oversized records are skipped without a paid result.
• maxItems limits paid snapshots and processing stops when the Apify PPE charge limit is reached.

Local verification

npm ci
npm run lint
npm test
npm run typecheck
npx --yes apify-cli validate-schema

Production uses Node.js 24, npm 12.0.2, a committed npm lockfile, and Oxc (oxlint).