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Search the World of Books catalogue of one storefront. Free text over title, author, publisher and both ISBNs, plus filters on author, publisher, the store's own three-level category tree, cosmetic condition, binding, language, product type, publication year, price and stock depth, and four sort orders. One row per EDITION (one barcode) carrying the identifiers a book buyer actually keys on — ISBN-13 AND ISBN-10 as separate fields — plus the author, publisher, publication year, binding, language, the full category path, the cheapest live price in that storefront's currency, the list price, which of the five conditions are in stock, a real unit count and the store's own sales rank. Every filter offered here was measured against an unfiltered call in the same run and really changes the result; filters the source accepts and then ignores are not exposed, and the engine re-checks the returned rows against the filter you asked for and reports any disagreement in meta.warnings instead of letting it pass. The result window is 1,000 records per query and the engine says so rather than looping past it.
curl -X POST https://api.reefapi.com/worldofbooks/v1/search \
-H "x-api-key: $REEF_KEY" \
-H "content-type: application/json" \
-d '{"market":"uk","query":"dune","per_page":"20","sort":"price_asc"}'Hit Send to run this endpoint live.
What you can run here, without an account
ReefAPI is one HTTP gateway to 438 live web-data APIs covering 2778 endpoints across 14 categories. Every endpoint answers with the same JSON envelope, so one integration reaches all of them. Each response reports what it cost and when the source was read.
No signup, no API key and no card are required to try an endpoint on this page. Anonymous calls run on a shared demo key, capped at 15 calls per hour per visitor. Pick an API, fill the parameters and the real response comes back from the live source, not from a canned sample. A free account lifts the cap and gives you 1,000 credits and your own key.
Browse every API in the catalog, read an endpoint's fields and example response in the docs, or see per-call credit costs on the pricing page.
Coverage by category
| ecommerce | 191 |
| classifieds | 99 |
| media | 25 |
| real-estate | 21 |
| utilities | 19 |
| developer-tools | 18 |
| jobs | 17 |
| reviews | 15 |
| social | 12 |
| travel | 9 |
| finance | 5 |
| other | 3 |
| search-seo | 2 |
| government | 2 |