The playground
Try any of 1465 endpoints — live.
Pick an endpoint, load a working example, tweak the params, and send — no signup to try. Results render the way the data deserves; raw JSON, headers & code are one tab away.
Playground demo key · api.reefapi.com
post/books/v1/subjects1 credit
browse a subject / genre / theme → ranked work cards PLUS facets (top authors, publishers, related subjects, people, places, time-periods) and work_count/ebook_count; optional ebooks-only and published_in year-range filters; page/limit pagination
Working example
Parameters
request preview
curl -X POST https://api.reefapi.com/books/v1/subjects \
-H "x-api-key: $REEF_KEY" \
-H "content-type: application/json" \
-d '{"subject":"fantasy","limit":"5"}'Hit Send to run this endpoint live.