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    • EXAMPLES

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  • INTRODUCTION

  • Getting Started
  • How to Use
  • Roadmap

  • FEATURES

  • HTTP
  • WebSocket
  • Handler Table
  • Tools
  • Node CLI
  • Browser CLI

  • UI

  • Custom UI

  • EXAMPLES

  • Playground

On This Page

  • Reset Dev tool
  • Add Temp Handler
  • Field
Question? Give us feedback 
DocsTools

Tools

MSW Dev Tool tools panel

Utility tools for MSW Dev Tool.

Reset Dev tool

Button to reset the Dev Tool to its initial runtime state.

  • Set HTTP and WebSocket behaviors to default
  • Enable global and per-item HTTP/WebSocket mocking
  • Remove temporary HTTP handlers, WebSocket endpoints, and listeners
  • Close active mocked WebSocket connections

Add Temp Handler

Add Temp Handler form

Dialog to add a temporary handler stored in the browser’s session storage.

Field

You can add the following fields to the temporary handler.

FieldDescriptionValidation
MethodHTTP method, Default: GETOptional

Path 

Path to mockRequired
Delay Delay time in milliseconds, Default: 0Minimum 0 milliseconds
StatusOne of the supported HTTP status codes, Default: 200Supported codes only
Status TextStatus message for status codeOptional
Content TypeMIME type of response body, Default: JSONOne of the supported MIME types
Response BodyResponse bodyAppropriate to Content Type
HeaderResponse headerJSON format
Last updated on September 23, 2026
Handler TableNode CLI
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