# Open Library Book Monitor - Authors, Editions & Metadata Search Open Library books and track authors, editions and bibliographic metadata under stable work IDs. Compare saved catalog records with source links. No book downloads. Canonical product page: https://mayd-it.com/data-tools/actors/openlibrary-book-discovery-monitor/ ## Example input ```json { "queries": [ "machine learning" ], "maxResults": 5, "itemsPerQuery": 3 } ``` ## Full guide # Open Library Book Monitor - Authors, Editions & Metadata Open Library Book Monitor - Authors, Editions & Metadata icon **Track bibliographic changes with stable work IDs and exports ready for a catalog.** Open Library Book Monitor with saved field comparisons, source URLs and CSV/JSON exports. Simple inputs, bounded results and readable reports. No source API key. ## Start in under a minute 1. Paste book searches into the first input field, or use the included sample. 2. Keep the five-result limit for your first run and choose **Start**. 3. Open **Observations**, **Scope and diagnostics**, or the **Readable run report** in Output. Export CSV or JSON from the dataset. ```json { "queries": [ "machine learning" ], "maxResults": 5, "itemsPerQuery": 3 } ``` No source account, API key, paid proxy or extra subscription is required for these public endpoints. Source availability and rate limits still apply. ## Who this helps Publishers, education apps and catalog enrichment teams. ## A real output sample Captured in a successful bounded Apify run; arrays and long text are shortened for readability. Values are snapshots, not live guarantees. ```json { "recordId": "/works/OL20709638W", "title": "Hands-On Machine Learning with Scikit-Learn, Keras, and TensorFlow", "workId": "/works/OL20709638W", "authors": [ "Aurélien Géron" ], "firstPublishedYear": 2019, "editionCount": 4, "languages": [ "eng" ], "ebookAccess": "no_ebook", "url": "https://openlibrary.org/works/OL20709638W", "observedAt": "2026-10-18T03:59:45.752Z", "comparisonStatus": "not_requested" } ``` ## What you receive One row per unique confirmed observation. Every row includes a stable `recordId`, title, source URL and observation time. | Field | Meaning | |---|---| | `workId` | Source-reported work id; missing optional values remain null. | | `authors` | Source-reported authors; missing optional values remain null. | | `firstPublishedYear` | Source-reported first published year; missing optional values remain null. | | `editionCount` | Source-reported edition count; missing optional values remain null. | | `languages` | Source-reported languages; missing optional values remain null. | | `ebookAccess` | Source-reported ebook access; missing optional values remain null. | | `comparisonStatus` | not_requested, new, changed or unchanged | | `changedFields` | Fields different from your last saved observation | | `previous` | Previous saved source values when comparison is enabled | ## Saved comparisons Enable **Compare with saved observations**, choose a snapshot name, and reuse the same input scope. The first run establishes history; it cannot report changes before that point. Enable **Save only new or changed observations** for later runs if you want a change-only export. An unchanged run can correctly save zero rows. Only confirmed saved rows advance history. A bounded or failed run never establishes that a missing record was deleted. History is stored in a named key-value store in the running user's account. Use one writer per snapshot: do not overlap runs against the same snapshot. Change the snapshot name when starting a new independent workflow. ## Scope and limitations Open Library search, first page, one row per work. Community metadata can be incomplete. No book text, protected content, sales estimates or complete edition list. At most ten input values and five hundred saved rows per run. Results requested per query controls a single source page (1–50, default five); there is no pagination. Each input performs one bounded public source request; NuGet also resolves its service index once per run. Requests are paced. Responses are capped at 8 MiB and share the run deadline. No authentication bypass or code execution is performed. HTTP 429 stops further requests. Source failures appear in SUMMARY and the HTML report, never as paid data rows. ## Pricing The configured base price is **$0.001 per saved observation**, plus **$0.00005 per start** at the default memory. Five observations cost $0.00505 at that base rate. Applicable plan discounts and the Store pricing panel govern actual charges. Set a maximum charge in Run options. Diagnostics, reports and unchanged skipped rows are not dataset result events. ## A practical workflow Publishers, education apps and catalog enrichment teams. Track bibliographic changes with stable work IDs and exports ready for a catalog. Start with the included five-result sample, review source links, then save your own scope as an Actor task. Use a named snapshot for repeat runs and keep source metadata with downstream exports. ## Make it recurring Save an Actor task with your inputs, then attach an Apify Schedule. For change detection, keep the same snapshot and avoid overlapping runs. Add an integration to deliver results to your own spreadsheet or workflow. No external delivery is enabled automatically. ## Frequently asked questions **Why did a repeat run return zero rows?** With change-only mode enabled, unchanged records are skipped. Check SUMMARY to distinguish this from empty matches, limits, or an upstream error. **Does a missing record mean it was deleted?** No. Searches cover a bounded source window; a record can move outside it. Missing records never become deletion claims. **Can I export or integrate the data?** Yes. Use Apify dataset exports for CSV/JSON, or the Actor API and your own integrations. No external message or delivery is enabled by default. ## Examples 1. **Book searches: machine learning** — A bounded machine learning observation sample. Review source evidence and export rows or compare them in a later run. 2. **Book searches: robotics** — A bounded robotics observation sample. Review source evidence and export rows or compare them in a later run. 3. **Book searches: climate change** — A bounded climate change observation sample. Review source evidence and export rows or compare them in a later run. ## Source and support [Official source documentation](https://openlibrary.org/dev/docs/api/search). This independent Mayd IT tool is not affiliated with the source platform. Open an Actor issue with the run ID and expected result, or contact bmay@mayd-it.com. Never include credentials.