Is Research Paper & DOI Lookup (Crossref) down?
Down
Yes, Research Paper & DOI Lookup (Crossref) is down.
It has failed every check since 17 Oct 2026, 10:38 UTC (2 days 2 h, 4 checks). Latest error: initialize returned HTTP 404. It last passed on 17 Oct 2026, 00:44 UTC.
Latest check
- Last check
- 48 min ago (19 Oct 2026, 11:55 UTC)
- Response time
- Not measured (typical 244 ms)
- Next check
- In about 24 h
- How often
- About every 11 hours over the last 7 days
Uptime
Uptime is the share of checks that passed. We checked it about every 11 hours over the last 7 days.
Outages in the last 30 days
1 outage, 2 days 2 h of failed checks in total.
| Started | Duration | Failed checks | First error |
|---|---|---|---|
| 17 Oct 2026, 10:38 UTC | Ongoing, 2 days 2 h so far | 4 | initialize returned HTTP 404 |
Times are when our checks ran, about every 11 hours for this listing, so start times and durations are accurate to about that.
Recent checks
| When | Result | HTTP | Time |
|---|---|---|---|
| 19 Oct 2026, 11:55 UTC | initialize returned HTTP 404 | 404 | 217 ms |
| 18 Oct 2026, 08:21 UTC | initialize returned HTTP 404 | 404 | 199 ms |
| 17 Oct 2026, 21:21 UTC | initialize returned HTTP 404 | 404 | 213 ms |
| 17 Oct 2026, 10:38 UTC | initialize returned HTTP 404 | 404 | 199 ms |
| 17 Oct 2026, 00:44 UTC | Passed | 200 | 244 ms |
How we check
Up means the MCP handshake and the tool list worked, or the server asked for sign-in or payment.
Checks come from our server, about every 11 hours for this listing over the last 7 days. A failure can also mean the service blocks our checks. Two failed checks in a row count as an outage, which ends at the next passing check.
If you think a check is wrong, contact hello@toolvet.app. More on how we check and score.