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API Documentation

The REST-Api will only provide the actual endpoint to communicate with in general. Every single endpoint for fetching data has to be provided by modules which are installed separately.

Untrusted/Self-Signed Certificates

Using Self-Signed or Untrusted Certificates for running the API is in general supported and by default applied once the Icinga 2 Agent certificates are being used.

However, you will have to ensure your clients either trust the certificate or you enable insecure connections. This applies to web-toolkits, applications and browsers. Clients connecting with certificate validation checks will be invalidated, resulting in a terminated connection. After 6 corrupt connection attempts the remote client will be blacklisted and banned from accessing the API.

REST-Api with JEA profile

If you are running Icinga for Windows v1.6.0 or later and use the JEA profile, you will have to use Install-IcingaForWindowsCertificate to either install the Icinga Agent certificate as API certificate or a custom one. Your REST-Api certificate configuration is then ignored. This command provides the arguments CertFile and CertThumbprint with the same behavior as the REST daemon, but will always enforce the local installed certificate over your REST daemon configuration.

Clear Blacklist Cache

To clear the blacklist to allow blocked clients to connect again, you will have to restart the PowerShell daemon:


Common Client examples

Curl with –insecure

To use curl with Self-Signed/Untrusted Certificates, use the --insecure argument:

curl -X GET "/v1/checker?command=cpu" --insecure

PowerShell without Validation

PowerShell is by default very strict when it comes to insecure connections. Within the PowerShell Framework itself, there is a Cmdlet available for this, allowing you to enable untrusted certificates within the current PowerShell session:


Invoke-WebRequest -Method GET -UseBasicParsing -Uri '/v1/checker?command=cpu';

API Versioning

All API calls are defined behind the API version. Once changes to the API handler itself are made, the versioning will change, allowing full backward compatibility


Query Endpoints

To view a list of available endpoints, simply query them by only using the API version on your web path




    "Endpoints": [
        "<list of registered endpoints>"