API Checker: The Dev Test Tool

📱 API Checker – Developer API Testing Tool

API Checker is a fast, lightweight, and powerful API testing tool built for developers who want to test, debug, and monitor APIs directly from their mobile device. Whether you are a backend developer, mobile app developer, or QA tester, API Checker helps you send requests, inspect responses, and troubleshoot issues anytime, anywhere.

With a clean interface and developer-friendly features, API Checker removes the need to depend only on desktop tools. You can quickly test REST APIs, validate responses, check headers, and debug server behavior on the go.

🚀 Key Features

🔹 Support for REST APIs

Easily test GET, POST, PUT, PATCH, and DELETE requests.

🔹 Custom Headers & Auth

Add custom headers, tokens, API keys, and authorization data.

🔹 Request Body Support

Send raw JSON, form data, or text payloads with full control.

🔹 Real-Time Response Viewer

View formatted API responses with status codes, headers, and body.

🔹 Pretty JSON Formatting

Automatically formats JSON responses for better readability.

🔹 Response Time Tracking

Check how long your APIs take to respond.

🔹 History Management

Save and reuse previously tested APIs without retyping everything.

🔹 Error Debugging

Quickly identify issues such as wrong endpoints, invalid headers, or server errors.

🔹 Secure by Design

Your API data is sent only to the API you specify. We do not store or sell your API information.

🎯 Who Is This App For?

• Mobile app developers testing backend APIs

• Backend developers verifying endpoints

• QA engineers validating responses

• Students learning API concepts

• Anyone who works with REST APIs

If you build apps, websites, or backend systems, API Checker can become your everyday testing companion.

💡 Why API Checker?

Most API tools are heavy desktop applications. API Checker focuses on speed, simplicity, and mobility. You can quickly test APIs during meetings, debugging sessions, deployments, or live server checks.

It is designed to be:

✔ Fast

✔ Simple

✔ Developer-focused

✔ Reliable

🔐 Privacy & Security

API Checker respects your privacy.

• No account required

• No personal data needed

• API requests go only to your server

• No hidden data collection

Your API keys and request data remain under your control.

🛠 Use Cases

• Test login, signup, and user APIs

• Debug broken endpoints

• Validate JSON responses

• Monitor server behavior

• Verify authentication headers

• Learn and practice API development

📈 Continuous Improvements

We are actively improving API Checker with performance upgrades, new developer features, and better debugging tools. Your feedback helps shape the future of this app.

❤️ Built for Developers

API Checker is built by a developer, for developers. The goal is to provide a clean, reliable, and efficient API testing experience without unnecessary complexity.

Download API Checker today and make API testing simple, fast, and portable.