{
"status": "success",
"data": {
"products": [
{ "id": "prod_01J82", "name": "Mechanical Keyboard" },
{ "id": "prod_01K99", "name": "Wireless Mouse" }
]
}
}Everything you can do in MockFlow
From API mocking to webhook debugging and utility tools, each module is designed for day-to-day development.
Mock API Builder
Create GET, POST, PUT, PATCH, and DELETE mock endpoints with custom status codes, headers, and JSON responses.
Build mocksRequest Catcher
Generate a public URL per project, capture incoming webhook requests, and inspect payloads and headers in one place.
Open Request CatcherDeveloper Tools Hub
Use built-in utilities like JSON Formatter, JWT Decoder, HTTP Status Code Explorer, IP lookup, and Base64/PDF converters.
Browse toolsInstant Access
No forms, no signups, no waiting. Open MockFlow and start building your schema instantly. Local-first architecture means sub-millisecond response times.
Full Control
Customize every detail: method, path, headers, and dynamic body content. Full CRUD support for all your testing needs.
Response Profiles
Toggle between success, error, and timeout scenarios with a single click to test your app's resilience.
Precision JSON Editor
Our editor uses JetBrains Mono for perfect alignment and readability, validating your schemas in real time.
Choose Your Workflow
Start local, move to the cloud whenever you're ready.
Frequently asked questions
Everything you need to know about MockFlow.
- What is MockFlow?
- MockFlow is a mock API generator that lets you create fake REST API endpoints with custom responses, headers, delays, and response profiles. It's designed for frontend developers, QA teams, and SaaS builders who need to prototype or test APIs without a real backend.
- Can I create a mock API without signing up?
- Yes. MockFlow has a guest mode that lets you create mock APIs instantly in your browser without any account. Guest mode stores all data locally in your browser — no signup required.
- Where is guest data stored?
- Guest mode data is stored entirely in your browser's localStorage. Nothing is sent to MockFlow servers. If you clear your browser data or switch devices, you will lose your guest data.
- Can I create real public API endpoints?
- Yes, with a MockFlow account. Account mode creates real mock API endpoints hosted in the cloud with permanent URLs you can share or use in external requests. Guest mode does not create real public URLs.
- Can I simulate API errors and slow responses?
- Yes. MockFlow supports response profiles (success, error, unauthorized, server error) and configurable response delays so you can test how your frontend handles every scenario.
- Can I use MockFlow for frontend development without a backend?
- Yes. MockFlow is designed specifically for frontend-first development. Define all your API endpoints and responses before the backend exists so your team can build and test the full UI without waiting.
- Is MockFlow free?
- MockFlow has a free tier. Guest mode is completely free with no signup required. Account features including cloud-hosted endpoints may have usage limits depending on the plan.
Explore MockFlow resources
Learn API mocking best practices, use production-ready tool pages, and review our legal documentation.