Kestrun

PowerShell brains. Kestrel speed

Kestrun jumpstarts your web automation with a fast, PowerShell-centric framework built on ASP.NET Core, blending scriptable flexibility with modern .NET performance.

Get started now View it on GitHub

Kestrun is a PowerShell-integrated framework on ASP.NET Core (Kestrel) designed for REST API development. It combines the performance of C# with the flexibility of PowerShell, making it easy to prototype, automate, and deliver production-ready APIs with confidence.

Highlights

  • PowerShell-first routing — author endpoints with Add-KrMapRoute or Razor+PS hybrids.
  • Auth built-ins — JWT, API keys, Kerberos, client certs.
  • Razor + PS — serve .cshtml with .ps1 backers.
  • Scheduling — PowerShell and C# jobs with cron-like control.
  • Logging — Serilog, syslog, REST; structured logs galore.
  • OpenAPI — generate specs, validate I/O.
  • WebDAV, SMTP/FTP — expand beyond HTTP when you want to get naughty.

Getting started 

# spin up Kestrun
Import-Module Kestrun
New-KrServer -Name 'MyKestrunServer'
Add-KrEndpoint -Port 5000
Enable-KrConfiguration

Add-KrMapRoute -Verbs Get -Path '/ps/hello' -ScriptBlock {
    Write-KrTextResponse -inputObject "Hello world" -statusCode 200
}
Add-KrMapRoute -Verbs Get -Path '/cs/hello' -Code @'
    Context.Response.WriteTextResponse("Hello world", 200);
'@ -Language CSharp

Start-KrServer

External Documentation