OpenApiLINQPadDriver 0.0.8-alpha

This is a prerelease version of OpenApiLINQPadDriver.
dotnet add package OpenApiLINQPadDriver --version 0.0.8-alpha                
NuGet\Install-Package OpenApiLINQPadDriver -Version 0.0.8-alpha                
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="OpenApiLINQPadDriver" Version="0.0.8-alpha" />                
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add OpenApiLINQPadDriver --version 0.0.8-alpha                
#r "nuget: OpenApiLINQPadDriver, 0.0.8-alpha"                
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
// Install OpenApiLINQPadDriver as a Cake Addin
#addin nuget:?package=OpenApiLINQPadDriver&version=0.0.8-alpha&prerelease

// Install OpenApiLINQPadDriver as a Cake Tool
#tool nuget:?package=OpenApiLINQPadDriver&version=0.0.8-alpha&prerelease                

OpenApiLINQPadDriver for LINQPad 7/8

Latest build NuGet Downloads License


OpenApiLINQPadDriver is LINQPad 7/8 dynamic data context driver for creating C# clients based on Open API/Swagger specifications



generation of lpx6 files is on the roadmap, for now we only support instalation via nuget



LINQPad 7/8



  • Open LINQPad 7/8.
  • Click Add connection link.
  • Click button View more drivers...
  • Click radio button Show all drivers and type OpenApiLINQPadDriver (for now it is also required to check Include Prerelease checkbox)
  • Install.
  • In case of working in environments without internet access it is possible to manually download nuget package and configure Package Source to point to a folder where it is located


Open API Connection can be added the same way as any other connection.

  • Click Add Connection
  • Select OpenApi Driver
  • Enter Open Api/Swagger Uri or click Get from disk and pick it from file
  • Manually enter API Uri or click Get from Open Api document, if servers are found in the specification then uri of the first one will be picked
  • Set settings
  • Click OK
  • Client should start generation, you can use it by right clicking on it and choosing Use in Current Query or by picking it from Connection select
  • It is possible to drag method name from the tree view on the left to the query
  • Example code using PetStore API
async Task Main() 
  var newPetId = System.Random.Shared.NextInt64();
  await PetClient.AddPetAsync(new Pet() 
    Id = newPetId,
    Name = "Dino",
    Category = new Category 
        Id = 123,
        Name = "Dog"

  await PetClient.GetPetByIdAsync(newPetId).Dump();

Refreshing client

  • Right click on the connection and click Refresh
  • Or use shortcut Shift+Alt+D

Configuration Options

Client Generation

  • Endpoint grouping - how methods will be grouped in generated client
    • Multiple clients from first tag and operationName - usually first tag corresponds to ASP.NET controller, so this will group methods by controller
    • Single client from OperationId and OperationName - this will put all endpoints in one class
  • Json library - library used in generated client for serialization/deserialization, for specification reading NJsonSchema uses Newstonsoft.Json
    • System.Text.Json
    • Newstonsoft.Json
  • Class style
    • POCOs (Plain Old C# Objects)
    • Classes implementing the INotifyPropertyChanged interface
    • Classes implementing the Prism base class
    • Records - read only POCOs (Plain Old C# Objects)
  • Generate sync methods - by default sync methods will not be generated
  • Build in Release - Build generated code in Release, default: false


  • Debug info: show additional driver debug info, e.g. generated data context sources, add Execution Times explorer item with execution times of parts of the generation pipeline and will add warnings from the compilation if any were present
  • Remember this connection: connection will be available on next run.
  • Contains production data: files contain production data.


  • Each generated client has PrepareRequestFunction Func, for Multiple clients from first tag and operationName mode, helper set only Func is also generted to set them all at once
  • This Func will be run on each method exectuion before making a http request, it is run in PrepareRequest partial methods generated by NSwag
  • It can be used to set additional headers or other http client settings
  • Example usage
async Task Main() 
  PrepareRequestFunction = (httpClient, requestMessage, url) => 
    requestMessage.Headers.Add("UserId", "9");
    requestMessage.Headers.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", "<token>");
async Task Main() 
  PrepareRequestFunction = PrepareRequest;

private void PrepareRequest(HttpClient httpClient, HttpRequestMessage requestMessage, string url) 
  requestMessage.Headers.Add("UserId", "9");
  requestMessage.Headers.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", "<token>");






  • Allow injection of own httpClient
  • Unit tests
  • PrepareRequest with string builder overload
  • ProcessResponse
  • PrepareRequest and ProcessResponse async overload that could be set via a setting
  • Methods parameters and responses in tree view
  • Auto dump response
  • Auth helper methods eg. SetBearerToken
  • When multiple servers are found allow selection
  • LINQPad 5 support
  • Examples (include in the nuget) - possibly the same ones could be used in testing
  • Expose JsonSerializerSettings setter on multi client setup
  • Expose ReadResponseAsString on multi client setup
  • Treat warnings as errors in generated code (generalDiagnosticOption: ReportDiagnostic.Error)
Product Compatible and additional computed target framework versions.
.NET net6.0-windows7.0 is compatible.  net7.0-windows was computed.  net7.0-windows7.0 is compatible.  net8.0-windows was computed.  net8.0-windows7.0 is compatible. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

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Version Downloads Last updated
0.0.8-alpha 52 6/1/2024
0.0.7-alpha 99 2/5/2024
0.0.6-alpha 95 1/14/2024
0.0.5-alpha 96 12/27/2023
0.0.4-alpha 96 9/10/2023
0.0.3-alpha 82 9/10/2023
0.0.2-alpha 76 9/8/2023
0.0.1-alpha 78 9/8/2023