Mock Rules

Basic concepts

In Mimicry, mock rules are organized in a hierarchy.

The folder structure of mock rules: projects, folders, and rules shown as a hierarchy in a tree view

Project- The top-level unit of organization (e.g., MyApp)

Folder- Groups rules together (e.g., Users API)

Rule- An individual mock rule

Each rule can be toggled on or off; a disabled rule is no longer applied.

Creating a rule

The mock rule editor showing setting fields for the URL pattern, HTTP method, status code, and response body

Select the folder to add the rule to in the left sidebar.

Set the URL pattern, HTTP method, and response.

Click the Save button to save the rule.

Make sure the rule is enabled (toggle switch).

Settings

URL pattern

Specify a pattern that matches the request URL. You can use wildcards (*).

# Exact match
https://api.example.com/users

# Path wildcard
https://api.example.com/users/*

# Multi-segment wildcard
https://api.example.com/*/profile

# Domain wildcard
https://*.example.com/api/*

HTTP method

Specify the HTTP method to match.

All methodsGETPOSTPUTPATCHDELETEHEADOPTIONS

Selecting "All methods" matches every HTTP method.

Status code

Specify the status code of the response. Common codes are available as presets, and selecting "Custom" at the end of the list lets you enter any code from 100 to 599 directly.

200OK

201Created

204No Content

301Moved Permanently

302Found

400Bad Request

401Unauthorized

403Forbidden

404Not Found

500Internal Server Error

502Bad Gateway

503Service Unavailable

Response headers

Specify the response headers in JSON format.

{
  "Content-Type": "application/json",
  "Cache-Control": "no-cache"
}

Response body

Set the response body. You can specify it in any format, such as JSON, text, or HTML.

{
  "id": 1,
  "name": "John Doe",
  "email": "[email protected]"
}

Delay (milliseconds)

Specify the delay in milliseconds before the response is returned. Use it to test network latency and timeout handling.

Example:050020005000

Projects and folders

Creating projects and folders

You can create a project or folder from the + button at the top of the left sidebar.

Duplicating a rule

Duplicate an existing rule to create similar rules efficiently.

Right-click the rule you want to duplicate
Select "Duplicate"
A rule with the same settings is created

This is handy when creating multiple rules with similar URL patterns or responses.

Drag & drop

You can reorder rules and folders by drag and drop. You can also move rules between multiple projects.

Enabling and disabling

Each rule has an enable/disable toggle switch. A disabled rule does not match requests.

Rule priority

When multiple rules match, the rule higher in the list takes precedence.

Hint: We recommend placing more specific rules (such as exact matches) higher and general rules (wildcards) lower.