The problem
Steam's "Overwhelmingly Positive" badge is an all-time average. It can stay green for weeks after a patch, a pricing change, or a broken launch actually tanks a game's rating. Most devs find out from an angry tweet or a Reddit thread, not from Steam itself.
I'd already built a similar review-mining tool for the App Store (a "copy+10%" market-research Actor — different post, different audience). Same week, I wondered: does Steam expose anything as clean as Apple's public RSS/Lookup endpoints? Turns out yes — better, actually.
What Steam gives you for free
Two public, zero-auth endpoints:
https://store.steampowered.com/appreviews/<appid>?json=1&filter=recent
https://store.steampowered.com/appreviewhistogram/<appid>?l=english
The first gives you individual reviews with voted_up (boolean, no star-rating math needed), playtime_at_review, refunded, written_during_early_access — much richer than I expected. The second gives you a rolling histogram of recommendations_up / recommendations_down per period (weekly for active games, monthly for older ones), which is the actual key to detecting a real decline instead of noise.
The bug that mattered
I first tried Steam's documented day_range parameter to window the query_summary to "last N days." It doesn't do anything — I tested it against a game with 800K+ reviews spanning two years, day_range=30 and no day_range at all returned byte-identical totals. Not documented as broken anywhere I could find, so noting it here in case it saves someone else the debugging time.
The appreviewhistogram endpoint is the actual fix: compare the most recent period's positive % against a baseline of prior periods, with a minimum-volume gate (I use 20 reviews/period) so a slow week on a small indie title doesn't get mistaken for a crisis.
Real result
Ran it against a game that had a rough launch week. Flagged an active decline immediately, and the negative-review sample broke down as 43% bugs/performance + 18% server issues — i.e., a genuine stability problem, not a subjective "the game isn't fun" wave. That distinction is the whole point: a balance-patch complaint is a design conversation, a wave of bug reports is a fire to put out today.
Try it
It's a pay-per-run Actor on Apify: https://apify.com/muddy_snowshoe/steam-review-miner (~$0.03/game analyzed). Point it at your own App ID to get an early-warning system, or a competitor's for market research.
Genuinely interested in feedback from anyone who's lived through a real Steam rating crisis — does the "active decline" threshold match what you actually experienced, especially around timing (how many days after the triggering event did it become visible in the data)?
Top comments (1)
The concept is strong — 'is my rating actively declining and why' is a real panic question for indie devs. But the listing page undercuts you: '$30.00 / 1,000 results' means nothing to a game dev (what's a 'result'? one review? one game?) — price it per report or per monitoring period instead. The description is accurate but passive; lead with the outcome: 'Know your review score is tanking before your wishlists do.' And 'Total users: 2, Rating 0.0' is social proof working against you — get three devs to quote, or show a sample report. The driver classification (bugs vs pricing vs balance) is the smart part — make that the headline. I do landing page teardowns for a living — kimmy.inkboxwire.com/roasts has free one-line examples from 550+ recent launches if the pattern is useful.