Build, test, and share realistic REST APIs in minutes—no backend required
Mock API Builder is a powerful tool that lets you create fully functional REST APIs without writing any backend code. Perfect for frontend developers, testers, and teams who need to prototype, test, or demonstrate API integrations quickly.
Whether you're building a React app, testing an iOS application, or demonstrating a new feature to stakeholders, Mock API Builder provides instant, realistic API responses without the wait.
Start frontend development immediately without waiting for backend APIs to be built.
Create specific test scenarios and edge cases that would be difficult to reproduce in production.
Share mock APIs with team members, stakeholders, or clients for demos and feedback.
No servers to configure, no databases to set up—just instant, working APIs.
Try the platform instantly without creating an account — build for 24 hours
Support for all HTTP methods with proper status codes and responses
Powered by Faker.js with 100+ data generators
Import existing specs to create complete APIs instantly
Start with pre-built templates for common use cases
Follow our Quick Start Guide and create your first mock API in just 5 minutes.