Open Library

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Category: Knowledge · Auth: none · Status today: OK (HTTP 200) · 1214 ms

Example request

This is the exact probe the sentinel runs daily — one read-only GET:

curl -s 'https://openlibrary.org/isbn/9780140328721.json'

Example output

Captured 2026-08-16 19:46 UTC (application/json, first 400 chars):

{"identifiers": {"goodreads": ["1507552"], "librarything": ["6446"]}, "title": "Fantastic Mr. Fox", "authors": [{"key": "/authors/OL34184A"}], "publish_date": "October 1, 1988", "publishers": ["Puffin"], "covers": [15152634, 8739161, -1], "contributions": ["Tony Ross (Illustrator)"], "languages": [{"key": "/languages/eng"}], "source_records": ["promise:bwb_daily_pallets_2021-05-13:KP-140-654", "ia

Checked 2026-08-16 19:46 UTC by the Free Tier Sentinel. Machine-readable: api-health.json.