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API Response Mocker
Local REST API Response Mocker
Design mock API routes, define response headers, status codes, and test endpoints locally inside a simulated browser sandbox.
100% Offline
Business
Add Mock Endpoint
Mock Server Config
Sandbox Simulated Client
Response Headers & Body:
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- ms
/* Response body will output here */
Active Mocks Directory
No custom mock endpoints registered yet. Create one on the left.
Frequently Asked Questions
Quick direct-answer guides about using this utility tool locally and securely.
How can I test mock endpoints?
You can use the Sandbox Simulated Client panel on the right. Enter the request method and path (e.g. GET /users) and click Send Request to receive the mock headers and payloads locally.
Can I intercept active browser fetch requests?
This tool runs inside an offline client sandbox. You can download the configurations JSON schema file to configure external mock servers or load it back anytime.