Goodreads Book Rating Momentum by URL

Unofficial — independent tool, not affiliated with, endorsed by, or sponsored by Goodreads. It reads only publicly visible pages. Support, reliability guarantees and the full disclaimer are at the bottom of this page.

For a known Goodreads book page, return its current public average rating and rating/review counts. Provide your own earlier counts to get signed changes ready for a publisher or retailer monitoring decision. A single snapshot makes no trend claim.

Input

Supply one to three exact HTTPS www.goodreads.com/book/show/<id> page URLs in bookUrls. Optional previousRatingCounts and previousReviewCounts map those exact URLs to nonnegative integer baselines. No search keywords, arbitrary URLs, or review pages. Input order is preserved and duplicate URLs collapse. The default contains two known books. Goodreads may canonicalize an older edition URL to a newer book ID; bookId always names the validated canonical page.

Output

One decision row per validated book. ratingCountDelta and reviewCountDelta are current minus supplied prior count and appear only for a supplied baseline. A negative delta can reflect source revisions; it is not a claim that readers removed ratings. No elapsed time or trend direction is invented. Example counts are illustrative and change at source.

Limits

The Actor rechecks robots.txt at each run, allows only /book/show/ pages, requests at most three books sequentially with two seconds between pages, and caps each response at 10 MiB and 30 seconds. It uses no proxy, browser, API key or paid data source. A 202/challenge, 403, 429, 404, redirect, timeout, oversized or malformed page fails explicitly. All selected pages are validated before any result delivery. The default memory is 256 MB.

Privacy

Only the book title, numeric public rating/counts, optional caller baseline deltas, book IDs and provenance are returned. Review prose, reviewer identity, profile data, shelves, author biography, HTML and cookies are never exported.

Pricing

One primary book-momentum-created paid event at $0.01 for each delivered decision row. No start or secondary charge. At most three rows cost $0.03; invalid input or source failure before delivery has no paid row.

Goodreads terms and current source access limits are documented in the dated scout under DR-0007.

If something goes wrong

• Wrong number or a failed run? Open a ticket on the Issues tab. I read every one and reply within 2 business days (Japan time).
• You never get a fake "empty" result. If the site can't be read, the run fails and says so. One validated book rating/count decision row delivered is one billable event. A source failure before delivery produces no paid row; earlier delivered rows remain billable after a later write failure.
• Checked every week. An automatic test runs this tool weekly; if the site changes, I fix it.
• Public pages only. No login, no personal data, and it goes easy on the site.

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Disclaimer

Unofficial, independent tool — not affiliated with, endorsed by, or sponsored by Goodreads. Product names and logos belong to their owners and only say where the data comes from. Data is read from public pages, for market research; check before you act on it.