← all 90 tracked mock & placeholder APIs
FAILING right now — answering HTTP 422 to plain requests.
Last checked 2026-09-26T01:30:50Z · checked every hour (a timeout/TLS/DNS blip on an otherwise-up service is confirmed with a same-run retry before it counts) · OK-rate 24h: 0% · 7d: 0% · raw JSON · Atom feed of its down/recovered events
Failing streak began 2026-09-19T02:30:27Z or earlier (7 days — dead, not a blip) · last successful check: none in the last 7 days
Context: The Internet Archive's open book catalog — keyless, free, tens of millions of records, and the API behind most book-search tutorials. A nonprofit treasure that behaves like one: in our timed runs (Sep 2026) searches took 2–5s when healthy and ~1 in 6 calls hung ~15s then dropped at the TLS handshake with no HTTP status (fetch throws TypeError). Their docs ask for 1 req/sec (3/sec with an identifying User-Agent). Shape traps: description is a plain string on some works and {type,value} on others; works list authors as bare keys (N+1 for names).
What we check: GET https://openlibrary.org/search.json?q=the&limit=1 — a plain, keyless request from Cloudflare's network with an honest bot UA, exactly what a tutorial curl or an <img> tag experiences. OK = HTTP 2xx/3xx within 8s. No retries, no cookies, no API keys.
If openlibrary.org is failing (or you're tired of finding out mid-demo), Mockbird gives you your own copy of the reference data — 250 countries (names, ISO codes, capitals, regions, currencies, flags) or 170+ currencies with dated sample rates — served as a queryable REST API in one pipe, no key, no monthly cap — free, no signup:
curl -s https://mockbird.mockbird.workers.dev/data/countries.db.json \
| curl -s -X POST 'https://mockbird.mockbird.workers.dev/api/projects/import?name=countries' \
--data-binary @-
# then e.g. ?region=Europe or ?code=FR on /m/YOUR_ID/countries
# currencies + sample rates: /data/currencies.db.json (see /guides/mock-exchange-rates-api)
Read the honest Open Library API (openlibrary.org) migration guide → (it also says when Open Library API (openlibrary.org) is the better tool) or create your own mock API in one click.
Does your project's test suite or tutorial depend on openlibrary.org? Embed a live status badge — it re-renders from our latest check (cached 5 min):
<!-- Markdown -->
[](https://mockbird.mockbird.workers.dev/status/openlibrary)
<!-- HTML -->
<a href="https://mockbird.mockbird.workers.dev/status/openlibrary"><img src="https://mockbird.mockbird.workers.dev/status/openlibrary/badge.svg" alt="openlibrary.org status"></a>
Green = answering plain GETs, red = network-dead, amber = answering but with an error status. Every tracked service has one; there's also a summary badge for all 90.
Subscribe any webhook URL — no account needed. One message when openlibrary.org goes down, one when it recovers (debounced: two consecutive hourly checks must agree, so a single blip never fires). Slack and Discord incoming-webhook URLs get a formatted message; anything else gets an HMAC-signed JSON POST.
Or from a terminal / CI script:
curl -X POST https://mockbird.mockbird.workers.dev/api/status/watch \
-H "content-type: application/json" \
-d '{"service": "openlibrary", "url": "https://hooks.slack.com/services/T000/B000/XXXX"}'
Use "service": "*" to watch all 90 tracked services at once. The response includes an unsubscribe curl; 5 consecutive failed deliveries auto-unsubscribe. No webhook? Omit "url" to get a pollable subscription instead — GET the returned poll URL anytime for the transitions since your last poll. Full API details →
The same checker can watch your own URL: POST /api/status/monitor {"url": "https://api.example.com/health", "notify": "<webhook>"} — every 30 minutes, alert on down + recovery, free, no account. Monitor API →
| Checked at (UTC) | Result | Time |
|---|---|---|
| 2026-09-26T01:30:50Z | HTTP 422 | 849 ms |
| 2026-09-26T00:30:43Z | HTTP 422 | 741 ms |
| 2026-09-25T23:30:44Z | HTTP 422 | 732 ms |
| 2026-09-25T22:30:45Z | HTTP 422 | 877 ms |
| 2026-09-25T21:30:48Z | HTTP 422 | 7366 ms |
| 2026-09-25T20:30:50Z | HTTP 422 | 953 ms |
| 2026-09-25T19:30:59Z | HTTP 422 | 998 ms |
| 2026-09-25T18:30:53Z | HTTP 422 | 2408 ms |
| 2026-09-25T17:30:56Z | HTTP 422 | 985 ms |
| 2026-09-25T16:30:55Z | HTTP 422 | 2329 ms |
| 2026-09-25T15:30:54Z | HTTP 422 | 1519 ms |
| 2026-09-25T14:31:04Z | HTTP 422 | 5082 ms |
| 2026-09-25T13:31:10Z | HTTP 422 | 875 ms |
| 2026-09-25T12:31:05Z | HTTP 422 | 879 ms |
| 2026-09-25T11:31:02Z | HTTP 422 | 1813 ms |
| 2026-09-25T10:30:54Z | HTTP 422 | 1575 ms |
| 2026-09-25T09:30:52Z | HTTP 422 | 1440 ms |
| 2026-09-25T08:31:02Z | HTTP 422 | 1313 ms |
| 2026-09-25T07:30:56Z | HTTP 422 | 3594 ms |
| 2026-09-25T06:30:51Z | HTTP 422 | 889 ms |
| 2026-09-25T05:30:48Z | HTTP 422 | 669 ms |
| 2026-09-25T04:30:47Z | HTTP 422 | 642 ms |
| 2026-09-25T03:30:42Z | HTTP 422 | 1070 ms |
| 2026-09-25T02:30:42Z | HTTP 422 | 993 ms |
| 2026-09-25T01:30:43Z | HTTP 422 | 940 ms |
| 2026-09-25T00:30:45Z | HTTP 422 | 1862 ms |
Bias disclosure: this page is run by Mockbird, a free hosted mock-API service. The status data is real and logged verbatim (pull it yourself), and the linked guides say when the incumbent wins.