Is Calibre Down? Check current status

Check if Calibre is down, official outages, user-reported issues, and outages map.

Current Calibre status

Calibre is working normally

Updated from Calibre official status page a few minutes ago

Calibre not working for you?

Calibre service health. Issues reported in the last 24 hours

Check the number of user-reported issues over the past 24 hours, grouped into 20-minute intervals. It's normal to see occasional reports, which may be due to individual user issues rather than a broader problem. We only consider an issue widespread if there are multiple reports within a short timeframe.

Working Normally
Possible Incident
Confirmed Outage
Calibre Outage Map

View Calibre Reports Map

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  • Track outages in real-time
  • Keep your team or customers informed
  • Create private or public status pages

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Calibre recent outages and downtime history

IsDown has tracked 26 incidents since started monitoring Calibre status in November 2021. We collect data from 4522+ services, and normalize the data to give you a clear picture of the impact of the outage. It will show official Calibre outages and also issues that we're started by a spike in crowdsource reports.

Date Incident Duration
Oct 20, 2025
07:00 AM EDT
Major
Test delays
Due to AWS incident with various services, we are experiencing delays in tests for North Virginia...
about 15 hours
May 28, 2025
10:05 PM EDT
Minor
Application unavailable
We are currently investigating this issue.
17 minutes
Jun 27, 2024
06:23 PM EDT
Major
Application outage
We are currently investigating application unavailability.
about 5 hours
Jan 09, 2024
05:47 PM EST
Major
Test processing delays in all regions
We are currently investigating test processing delays in all testing regions. You might experienc...
about 6 hours
Nov 08, 2022
02:38 AM EST
Minor
Test delays in Canada region
We are currently investigating test delays in the Canada region. You might experience some Snapsh...
about 2 hours
Oct 01, 2022
04:30 AM EDT
Minor
Test Processing Delay
We are investigating a delay in tests being processed.
about 2 hours
Sep 14, 2022
06:31 AM EDT
Minor
Test delays in North Virginia region
We are currently investigating test delays in the North Virginia region. You might experience som...
about 1 hour
Aug 23, 2022
07:57 PM EDT
Minor
API requests are affected by an upstream DNS issue
An upstream DNS issue is preventing API requests (Node.js API, Command Line Client) made to api.c...
about 2 hours
Jul 12, 2021
02:43 AM EDT
Minor
Degraded application performance
We are currently investigating elevated error reports for Calibre's user interface and APIs.
9 months
Feb 11, 2021
08:08 PM EST
Minor
Website and documentation partially unavailable
Due to an outage of our hosting provider, Vercel, our marketing website and documentation might b...
about 1 year
Sign up to check more outage history

Be the first to know when Calibre goes down

  • Monitor external dependencies in one place
  • Track outages in real-time
  • Keep your team or customers informed
  • Create private or public status pages

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User comments about Calibre status

See what users are saying about Calibre issues that impacted them and how they are affected by the outage. You can see if other users are experiencing the same issues and if there are any workarounds or solutions.

  • Richard - Caliber is simply just not loading for me..

  • Patrick - Crashes with every document when converting to epub file format .

  • Joshua - authenication server error.

Calibre components or services current status

Component Status Details
Application status OK View details
CLI & Node.JS API status OK View details
Test Agents status OK View details
Website & Documentation status OK View details

Users who monitor Calibre status also monitor these services

Users are monitoring tens of services with IsDown. Here are some that are monitored together with Calibre. With IsDown you can get a bird's eye view of all your dependencies and how they are performing.

Causaly

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Calix

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OK
Kindly

Kindly

OK
CacheFly

CacheFly

MAINTENANCE
CallFire

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OK
Calendso

Calendso

OK
Cambly

Cambly

OK
Callbell

Callbell

OK
Caliva

Caliva

OK
CallHub

CallHub

OK
Callingly

Callingly

OK
100ms

100ms

OK
CallRail

CallRail

OK
Upstash

Upstash

OK
View all services Start Monitoring Your Dependencies

Website performance monitoring and optimization tool with data centers in global locations including Singapore, Ohio, Northern California, Oregon, Tokyo, Seoul, North Virginia, and Sydney.

Monitoring Calibre since November 2021

Tracking 20 Calibre services and regions

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Check their status page.

2 incidents in 2025

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How to monitor the status of Calibre and all your dependencies?

IsDown is a status page aggregator that monitors if Calibre and all your dependencies are experiencing issues. We combine the status of all the services you dependent and provide a clear view of all your vendors health in one place. We not only monitor official information but also crowdsourced reports. That means that even when Calibre, per example, doesn't report an outage, you will still be notified if other users are experiencing issues.

How IsDown monitors Calibre?

IsDown monitors Calibre health in almost real-time

Every few minutes we go to the status page of Calibre (and 4,522+ other services) and check if they are experiencing issues. We collect the status and outage information of Calibre's 20 components. Also, we not only monitor official sources but also user reports. Sometimes or a lot of times vendors take some time to report an incident, so by monitoring user reports we're able to alert you early.

The moment an issue is detected in Calibre, IsDown sends an alert and updates your status page

Not only you will get notified, but IsDown offers notification filters, so you can choose which issues you want to be notified about. This way you avoid getting all the incidents from Calibre and other services.

One status page to monitor all your external dependencies

What you get when monitoring Calibre with IsDown

Track Calibre incidents and downtimes by severity

IsDown checks Calibre official status page for major/minor outages or downtimes. A major outage is when Calibre experiences a critical issue that severely affects one or more services/regions. A minor incident is when Calibre experiences a small issue affecting a small percentage of its customer's applications. An example is the performance degradation of an application. The moment we detect a Calibre outage, we send you an alert and update your dashboard and status page.

Get alerted as soon as users reports problems with Calibre

Calibre and other vendors don't always report outages on time. IsDown collects user reports to provide early detection of outages. This way, even without an official status update, you can stay ahead of possible problems.

All the details of Calibre outages and downtimes

IsDown collects all information from the outages published in Calibre status page to provide the context of the outage. If available, we gather the title, description, time of the outage, status, and outage updates. Another important piece of information is the affected services/regions which we use to filter the notifications that impact your business.

Prepare for upcoming Calibre maintenance events

Calibre publishes scheduled maintenance events on their status page. IsDown collects all the information for each event and creates a feed that people can follow to ensure they are not surprised by unexpected downtime or problems. We also send the feed in our weekly report, alerting the next maintenances that will take place.

Only get alerted on the Calibre outages that impact your business

IsDown monitors Calibre and all their 20 components that can be affected by an outage. IsDown allows you to filter the notifications and status page alerts based on the components you care about. For example, you can choose which components or regions affect your business and filter out all other outages. This way you avoid alert fatigue in your team.

One platform to monitor all your external dependencies

Our tool was build to be the best way to monitor all your external dependencies in one place. IsDown not only will help you monitor Calibre but also 4,522 other services. Your team and customers will have a clear view of all your dependencies and their status, making it easier to identify and resolve issues.

Monitor Calibre and all your external dependencies in real-time

Add all your dependencies to your dashboard. IsDown will monitor them in real-time and send you alerts when there is an issue. You can also create a status page for a bird-eye view and share it with your team.

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Monitor Calibre and all your external dependencies in real-time

Get notified imediatelly when there's an issue with Calibre or other services

Not only you will get notified, but IsDown offers notification filters, so you can choose which issues you want to be notified about. This way you avoid getting all the incidents from Calibre and other services.

Start Monitoring for Free
Get notified imediatelly when there's an issue with Calibre or other services

Send outage information from Calibre and other services to your tools

IsDown integrates with 20+ tools. Connect the status of Calibre and 4,522 other vendors to your tools to receive vendor outage alerts exactly where your team needs them.

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Send outage information from Calibre and other services to your tools

Share Calibre status in your status page

Create a status page that can easily be access by your team and customers. You can make it public or private, and customize it to your needs. This will be your first line of communication when there's the question 'Is Calibre down?'

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Share Calibre status in your status page

Calibre Downdetector vs IsDown

While Downdetector relies on user-submitted reports to detect Calibre outages, IsDown monitors Calibre's status page for verified, detailed incident information. Here's why official monitoring provides better reliability for your business:

Features
Downdetector
Official Calibre status page monitoring with real-time incident details.
Monitor 4,522+ services including Calibre in a single dashboard.
Instant Calibre outage alerts sent to Slack, Teams, PagerDuty, and more.
Combined monitoring of Calibre official status and user-reported issues.
Maintenance feed for Calibre
Granular alerts filtering by Calibre components and regions.
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Frequently Asked Questions

Is Calibre down today?

Calibre isn't down. You can check Calibre status and incident details on the top of the page. IsDown continuously monitors Calibre official status page every few minutes. In the last 24 hours, there were 0 outages reported.

What is the current Calibre status?

Calibre is currently operational. You can check Calibre status and incident details on the top of the page. The status is updated in almost real-time, and you can see the latest outages and issues affecting customers.

Is there a Calibre outage now?

No, there is no ongoing official outage. Check on the top of the page if there are any reported problems by other users.

Is Calibre down today or just slow?

Currently there's no report of Calibre being slow. Check on the top of the page if there are any reported problems by other users.

How are Calibre outages detected?

IsDown monitors the Calibre official status page every few minutes. We also get reports from users like you. If there are enough reports about an outage, we'll show it on the top of the page.

Is Calibre having an outage right now?

Calibre last outage was on October 20, 2025 with the title "Test delays"

How to check if Calibre is down?

Why use IsDown to monitor Calibre instead of the official status page?

Because IsDown is a status page aggregator, which means that we aggregate the status of multiple cloud services. You can monitor Calibre and all the services that impact your business. Get a dashboard with the health of all services and status updates. Set up notifications via Slack, Datadog, PagerDuty, and more, when a service you monitor has issues or when maintenances are scheduled.

How IsDown compares to DownDetector when monitoring Calibre?

IsDown and DownDetector help users determine if Calibre is having problems. The big difference is that IsDown is a status page aggregator. IsDown monitors a service's official status page to give our customers a more reliable source of information instead of just relying on reports from users. The integration allows us to provide more details about Calibre's Outages, like incident title, description, updates, and the parts of the affected service. Additionally, users can create internal status pages and set up notifications for all their third-party services.

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