Mocklyst
Mock APIs in seconds — no signup required

Ship faster with instant mock APIs

Design a response schema, generate a live endpoint, and call it from your code in under 30 seconds. Configure methods, status codes, headers, and latency — no accounts, no setup, no clutter.

Read the docs

Free forever · Endpoints auto-expire after 7 days · CORS enabled

A response schema transforming into a live mock API endpoint with a successful JSON response
From response shape to working endpoint in seconds.

Features

Everything you need to mock like it's production

A focused toolset for developers who need realistic APIs — fast.

Visual schema designer

Build object, array, or primitive responses with a clean form and a live JSON editor — synced in real time.

Realistic mock behavior

Choose the HTTP method, status code, custom headers, and latency for every endpoint — exactly like a real API.

Latency simulation

Add fixed or random response delays up to 60 seconds to test loading states, spinners, and timeouts.

Real-time analytics

Track request volume, response times, status distribution, and peak RPM from actual endpoint traffic.

Tiered rate limiting

Fair usage limits per IP with transparent X-RateLimit headers on every response.

Live editing

Update schemas and behavior after creation with conflict detection — your consumers always see the latest shape.

Templates

Start from a proven schema

Industry-ready JSON templates for the most common API shapes.

Browse all templates
E-commerce
{
  "orderId": "ORD-1001",
  "status": "shipped",
  "items": [
    { "sku": "SKU-41", "qty": 2 }
  ],
  "total": 129.98
}
Finance
{
  "accountId": "ACC-8842",
  "balance": 12450.75,
  "currency": "USD",
  "transactions": []
}
Healthcare
{
  "patientId": "PAT-7731",
  "name": "Jane Roe",
  "dob": "1984-03-12",
  "visits": []
}
IoT
{
  "deviceId": "DEV-0091",
  "temperature": 22.4,
  "humidity": 41,
  "online": true
}
Social
{
  "postId": "PST-551",
  "author": "alex",
  "likes": 128,
  "comments": []
}
Logistics
{
  "trackingId": "TRK-2049",
  "status": "out_for_delivery",
  "eta": "18:30",
  "stops": []
}

Changelog

Recently shipped

  1. Configurable mock behavior

    Aug 2026

    Endpoints now support HTTP methods, custom status codes, response headers, and latency simulation.

  2. Real analytics pipeline

    Aug 2026

    Dashboard KPIs, trends, and the live request feed now show real traffic data from every endpoint.

  3. Schema designer redesign

    Aug 2026

    A cleaner, faster, professional designer with a segmented response type control and unified JSON editing.

  4. Bulk operations in the dashboard

    Aug 2026

    Select, export, import, and delete endpoints in bulk with JSON export support.

How it works

From idea to endpoint in three steps

01

Design your response

Use the visual schema designer or paste JSON directly. Pick the response type, add fields, and preview the output live.

02

Configure the behavior

Set the HTTP method, status code, custom headers, and latency — so your mock behaves like the real API will.

03

Generate and call it

Get a public endpoint instantly. Use it from your app, your tests, or Postman — no authentication required.

Demo

A mock that behaves like the real thing

Configure the endpoint once — POST /orders returns 201 with your custom headers and a realistic delay, and the wrong method gets a clean 405.

  • Realistic responses

    Configured status codes, headers, and delays — every time.

  • Method-aware

    GET, POST, PUT, PATCH, or DELETE — your mock answers them all.

  • Rate-limit headers

    X-RateLimit-Limit / Remaining / Reset on every response.

Try it yourself
request
$ curl -X POST \ https://api.mocklyst.com/api/mock/7f3k9q 
  -H "Content-Type: application/json" 
  -d '{"sku":"SKU-41","qty":2}'

→ 201 Created
x-powered-by: Mocklyst · x-ratelimit-remaining: 98
{
  "orderId": "ORD-1001",
  "status": "created"
}
421ms (simulated latency)

FAQ

Frequently asked questions

Do I need an account to create a mock API?

No. You can create an endpoint instantly without signing up. Accounts are optional and add analytics, persistent endpoints in your dashboard, and higher rate limits.

How long do endpoints live?

Endpoints auto-expire after 7 days. Expired endpoints return a 410 Gone response and are cleaned up automatically.

Can I control the HTTP status code and headers?

Yes. Every endpoint supports a custom method (GET/POST/PUT/PATCH/DELETE), a status code from 100–599, custom response headers, and latency simulation.

Is there a rate limit?

Anonymous users get 100 requests/hour per IP; authenticated users 500/hour; premium 2000/hour. Rate limit details are returned on every response via X-RateLimit headers.

Can I edit an endpoint after creating it?

Yes — update the schema, method, status code, headers, or latency anytime from your dashboard, with conflict detection when multiple sessions edit.

Is my data safe?

Endpoints are isolated by row-level security when owned by an account, and anonymous endpoints are short-lived by design. Your schema is only ever stored to serve your mock.

Ready to start building?

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