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Search every copy on offer across 11,264 Dutch and Belgian second-hand and antiquarian bookshops and private sellers. ONE ROW IS ONE COPY from ONE seller at ONE price, not a catalogue title: the same ISBN appears once per shelf it sits on, which is what makes the price spread visible. `query` takes a title, an author, a publisher or an ISBN. 🔴 Search rows do NOT carry an ISBN — the source's result table has no ISBN column; call `book` with the row's `book_id` for ISBN, language, condition and the full seller block. 50 copies per page (measured constant on 12 sampled pages); the site's own ceiling is page 200, i.e. at most 10,000 copies per query.
curl -X POST https://api.reefapi.com/boekwinkeltjes/v1/search \
-H "x-api-key: $REEF_KEY" \
-H "content-type: application/json" \
-d '{"query":"tolkien"}'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 |