API Mock Server
Create live mock API endpoints with custom JSON responses in under a minute
field: type lines, then generate realistic mock JSON to develop against before the real endpoint exists.[
{
"id": 1,
"name": "Ava García",
"email": "zara.chen@orbit.com",
"company": "Kestrel Group",
"plan": "plan-1",
"mrr": 428.43,
"created_at": "2026-06-12T23:01:21.000Z",
"active": true
},
{
"id": 2,
"name": "Mateo Smith",
"email": "ava.khan@acme.com",
"company": "Cobalt Group",
"plan": "plan-2",
"mrr": 404.01,
"created_at": "2026-04-14T11:35:33.657Z",
"active": true
},
{
"id": 3,
"name": "Liam Chen",
"email": "priya.okafor@vertex.com",
"company": "Orbit Group",
"plan": "plan-3",
"mrr": 311.97,
"created_at": "2025-12-05T13:33:02.966Z",
"active": true
},
{
"id": 4,
"name": "Mateo Chen",
"email": "noor.dubois@bright.com",
"company": "Northwind Labs",
"plan": "plan-4",
"mrr": 187.66,
"created_at": "2025-11-28T18:16:40.299Z",
"active": true
},
{
"id": 5,
"name": "Noor Nowak",
"email": "zara.nowak@lumen.com",
"company": "Bright Labs",
"plan": "plan-5",
"mrr": 125.45,
"created_at": "2026-02-23T22:43:54.727Z",
"active": false
}
]Build and test your frontend or automation workflow without a real backend. Define the request path, method, and response JSON — and get a live mock endpoint URL you can use immediately in any tool, framework, or integration.
What Is API Mocking?
API mocking creates a fake endpoint that returns predefined responses. It allows frontend developers, QA testers, and automation builders to work without waiting for a real backend.
When to Use a Mock API
- Frontend development — build UI before the backend API is ready
- Automation testing — test Make/Zapier/n8n flows against a predictable endpoint
- Demos — show a working integration without connecting live systems
- Load testing — test how your client handles API responses at scale
- Error handling — simulate 4xx/5xx responses to test your error logic
What You Can Configure
- Endpoint path —
/api/users,/webhook/orders, etc. - HTTP method — GET, POST, PUT, DELETE, PATCH
- Status code — 200, 201, 400, 401, 500, etc.
- Response headers — Content-Type, custom headers
- Response body — any valid JSON (or plain text)
- Delay — simulate network latency
Related Reading
This is a useful companion to the API Request Tester when you're building a Make.com or n8n scenario against a webhook that isn't live yet — see Make.com Webhook Tutorial or n8n Webhook Tutorial for the receiving side of that workflow.
From Mock to Production
Mock servers are useful for development but need to be replaced with real implementations before go-live. If you're building a production API or webhook backend, this is the kind of work I do for clients regularly. Book a consultation to discuss architecture, authentication, rate limiting, and monitoring.
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