1
Choose the state to test
Decide whether you need a successful response, empty result, validation message or another scenario.
Frontend API Testing
Test Frontend API Integrations Without a Backend
Frontend API testing is easier when responses are predictable. Forge API lets you create controlled endpoints for testing components, screens, error handling and application flows without depending on a live backend.
No backend server setup required.
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Test user interfaces with predictable data.
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Reproduce the same response across multiple test runs.
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Develop loading, empty, success and failure states.
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Avoid using production services during frontend testing.
How it works
From JSON to a working endpoint
2
Create the JSON response
Define the fields and values required to exercise that frontend state.
3
Call the endpoint
Use the Forge API URL in your component, page or automated test.
Use cases
Built for practical development workflows
Component development
Build components around realistic asynchronous data and network requests.
End-to-end testing
Use stable responses during browser-based application tests.
Error-state design
Confirm that interfaces clearly handle missing, malformed or unsuccessful responses.
Frequently asked questions
Questions about frontend api testing
Why not hard-code test data in the frontend?
A hosted mock endpoint exercises your real request and response handling, making development closer to the final integration.
Can I use Forge API with automated tests?
Yes. Test suites can call Forge API endpoints when stable, predefined responses are useful.
Can I test multiple response scenarios?
Yes. You can create separate endpoints or update responses to represent different application states.
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.