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API Mock Designer

Design API endpoints visually, auto-generate realistic mock data (users, products, orders), and export as an OpenAPI 3.0 spec or Postman collection. Perfect for frontend development and API prototyping.

API Mock Server Designer

Design mock endpoints and generate realistic API responses.

3 endpoints · 1.8 KB
Endpoints
GET/api/users200
POST/api/users201
GET/api/products200
Export
Generate:
Template Helpers
{{name}}{{email}}{{id}}{{date}}{{number:1-100}}{{image:200x200}}
API Reference Preview
GET/api/users200
[
  {
    "id": "412582f0-9940-4e52-9998-4e1b02c06d8d",
    "name": "Marco Taylor",
    "email": "marco.taylor@gmail.com",
    "avatar": "https://api.dicebear.com/7.x/initials/svg?seed=Marco%20Taylor"...
POST/api/users201
{
  "id": "{{id}}",
  "name": "{{name}}",
  "email": "{{email}}"
}
GET/api/products200
[
  {
    "id": "0934d7cc-ff41-4a55-ab68-fa4fc6af060d",
    "name": "Deluxe Keyboard",
    "price": 146.64,
    "description": "High-quality product with excellent features and durability.",
    "imag...

How to Design Mock API Endpoints

Create mock API endpoints with realistic data using The IT Hustle's free API Mock Designer.

  1. 1
    Add an endpointClick Add Endpoint and configure the HTTP method (GET/POST/PUT/DELETE), path, and status code.
  2. 2
    Define the responseWrite JSON in the response body editor, or click Auto-Generate to create realistic mock data automatically.
  3. 3
    Use template variablesUse placeholders like {{name}}, {{email}}, {{id}}, {{date}} in your JSON to generate different data each time.
  4. 4
    ExportExport all endpoints as an OpenAPI 3.0 spec (YAML) or Postman collection for team sharing.

Frequently Asked Questions

Users (names, emails, avatars), products (names, prices, descriptions), orders (IDs, items, totals, dates), and comments (authors, text, likes). You can also use template variables for custom fields.

Yes. The Export as Postman Collection button generates a Postman v2.1 collection JSON file with all your endpoints, ready to import into Postman.

No. This tool designs mock endpoints and generates realistic response data. For a running mock server, export the OpenAPI spec and use tools like Prism or json-server.

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