InstantMock

InstantMock runs a local HTTP mock server directly inside VS Code using JSON route definitions.

Key Features

• One command to toggle server state: InstantMock: Toggle Server
• One command to preselect or change mock file: InstantMock: Select Mock File
• Status bar indicator for ON/OFF state
• Route matching by path and HTTP method
• Configurable response status, JSON body, and delay per route
• Startup port prompt with 3000 prefilled as recommended
• Startup mock-file picker with remembered recommended file path
• CORS headers enabled for local frontend development

Quick Start

1. Create a JSON mock config file (for example mock-api.json in your workspace root).
2. Open Command Palette (Cmd+Shift+P on macOS).
3. Run InstantMock: Toggle Server.
4. Choose the mock file:
5. Use recommended file (last selected, or workspace mock-api.json) or browse any local file.
6. Confirm or enter the server port (3000 recommended).
7. Call your endpoints on http://localhost:<selected-port>.

Example mock-api.json:

{
  "routes": [
    {
      "path": "/api/health",
      "method": "GET",
      "status": 200,
      "body": {
        "status": "ok"
      }
    }
  ]
}

Command

• InstantMock: Toggle Server
• InstantMock: Select Mock File

Setting

• instantMock.port: Server port setting (default 3000) available for compatibility.