Calling ASP.NET Web API endpoints at regular intervals can be easily done using Windows Task Scheduler and PowerShell’s Invoke-RestMethod. The following script makes a GET call for each supplied endpoint, if a call fails then the endpoint’s URL and the error details are sent to Windows Application Event Log.

MonitorEndpoints.ps1

#############################################  
##  
## Monitor ASP.NET WebAPI Enpoints 
## Author: Stefan Prodan   
## Date : 7 Apr 2014  
## Company: VeriTech.io    
#############################################

#Base url
$urlPrefix = "http://localhost/MyApp.Server/";

#Endpoints
$endpoints = @(
"api/status/ping", 
"api/alerts/check", 
"api/jobs/run"
);

$headers = @{"Client-Token"="my-app-client-secret-token"};

function Log([string] $url, $exception){
    #Create EventLog source if it doesn't exist
    $eventSource = "MyApp Job";
    if (![System.Diagnostics.EventLog]::SourceExists($eventSource)){
        New-Eventlog -LogName "Application" -Source $eventSource;
    }

    #Write warning to EventLog
    $message = "Call failed URL: " + $url + " Details: " + $exception;
    Write-EventLog -LogName "Application"`
     -Source $eventSource -EventId 1 -EntryType Warning -Message $message;
}

#Call each endpoint 
foreach ($endpoint in $endpoints) {
    Write-Output -InputObject $endpoint;

    try {
        $response = Invoke-RestMethod -Uri ($urlPrefix + $endpoint)`
         -method GET -ContentType "application/json" -Headers $headers;
        Write-Output -InputObject $response;
    }
    catch {
        Write-Output -InputObject $_.Exception.Response.StatusCode.Value__;
        Log -url ($urlPrefix + $endpoint) -exception $_.Exception.Message;      
    }
}