Programming language: C#
License: MIT License
Tags: Software Development     IDE/Tools    
Latest version: v2020.12.11.114

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License MIT License

Quickly mock away any webservice using HttPlaceholder. HttPlaceholder lets you specify what the request should look like and what response needs to be returned.


  • ⚙ Install as dotnet tool dotnet tool install --global httplaceholder
  • 🗔 Install on Windows powershell Set-ExecutionPolicy Bypass -Scope Process -Force; iex ((New-Object System.Net.WebClient).DownloadString('https://raw.githubusercontent.com/dukeofharen/httplaceholder/master/scripts/Install-Windows.ps1'))
  • 🐧 Install on Linux bash curl -o- https://raw.githubusercontent.com/dukeofharen/httplaceholder/master/scripts/install-linux.sh | bash
  • 🍎 Install on Mac OS X bash curl -o- https://raw.githubusercontent.com/dukeofharen/httplaceholder/master/scripts/install-mac.sh | bash


At my current job, we develop and maintain a lot of web applications. These web applications have a lot of dependencies on other web services. So I thought: instead of running all these dependent web services on the local dev machine, why not use a stub to make development easier? That's exactly what I did.

So a few bullet points in a row:

🤠 Define all the needed requests in a YAML file, which can also be checked in for all your team members to use. 🏄‍ Many request conditions take regular expressions, to make your stub even more flexible. 😴 Use the HttPlaceholder REST API to prepare all the requests you need for automated tests.


You have an input YAML file (which contains 1 or more requests):

- id: situation-01
    method: GET
      path: /users
        id: 12
        filter: first_name
    statusCode: 200
    text: |
        "first_name": "John"
      Content-Type: application/json

In the conditions element, you specify which conditions the request should apply to.

  • The method should be GET.
  • The path of your URL should be '/users'.
  • The query parameters id and filter should be there with the values 12 and first_name respectively.

In this case, if you go to the URL http://localhost:5000/users?id=12&filter=first_name, you get the response as defined.

The response element defines the response of the request. In this case, HTTP 200 is returned, the literal JSON string defined and application/json as Content-Type header. Also take a look at the [samples](docs/SAMPLES.md).

Go to http://localhost:5000/ph-ui, you will get to the management interface to see all made requests and all stubs.

[Management UI](docs/img/ui_screenshot.png)

Batteries included 🔋

  • XPath conditions.
  • JSONPath conditions.
  • Request header conditions.
  • Many conditions also take regular expressions.
  • Basic authentication conditions.
  • Add Base64 and file references to your response, so returning files is also possible.
  • Artificially make your responses slower, to simulate slow web servers and test the timeout settings of your application.
  • HttPlaceholder can be run under HTTPS.
  • REST API to automate the creation of stubs (useful in test scenarios).
  • User interface to view stubs and executed requests.
  • And more.

Documentation 📚

  • [Installation](docs/INSTALL.md)
  • [Getting started](docs/GETTING-STARTED.md)
  • [Stub samples](docs/SAMPLES.md)
  • [HttPlaceholder REST API](docs/API.md)
  • [Configuration](docs/CONFIG.md)
  • [Request conditions explained](docs/CONDITIONS.md)
  • [Response definitions explained](docs/RESPONSE.md)
  • [Management interface](docs/UI.md)

Tools 🛠

  • [HttPlaceholder REST API client for .NET](docs/NUGETCLIENT.md)


  • There's no way to add custom condition checkers or response writers yet.

*Note that all licence references and agreements mentioned in the HttPlaceholder README section above are relevant to that project's source code only.