1
Define the route
Create a route that matches the endpoint your production application will eventually use.
JSON API Mock
Create a JSON API Mock Online
Create a JSON API mock that returns the exact data structure your application needs. Forge API provides a hosted endpoint, so you can connect your frontend without configuring a local server or waiting for backend development.
No backend server setup required.
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Return custom JSON from a hosted URL.
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Model objects, arrays, nested data and API responses.
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Develop React, Next.js, Vue, Angular, Flutter and mobile apps.
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Keep frontend work moving while backend contracts are finalised.
How it works
From JSON to a working endpoint
2
Paste the response
Add valid JSON containing the fields, values and nesting required by your interface.
3
Connect your application
Use the generated endpoint with fetch, Axios or your preferred API client.
Use cases
Built for practical development workflows
JSON response design
Agree on response structures before backend implementation begins.
UI development
Populate tables, dashboards, forms and lists with realistic API data.
Integration testing
Test how your application parses and displays expected JSON responses.
Frequently asked questions
Questions about json api mock
What is a JSON API mock?
A JSON API mock is an endpoint that returns predefined JSON data instead of retrieving it from a production database or backend service.
Can the response contain nested JSON?
Yes. You can use objects, arrays, nested properties and other valid JSON structures.
Can I use the endpoint from a frontend framework?
Yes. The generated URL can be called from frontend applications using standard HTTP tools.
Build your frontend before the backend is ready
Create custom mock endpoints, return your own JSON and connect your application to a working API URL in seconds.