API Tester - REST Client

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About this app

API Tester - Fast REST API Client for Android

Test, debug and inspect REST APIs directly from your phone with API Tester.

Send HTTP requests in seconds, view formatted JSON responses, manage headers and authentication, and quickly troubleshoot APIs from anywhere.

Perfect for developers, QA testers, backend engineers and tech enthusiasts who need a lightweight mobile REST client.

Powerful API Testing Tools
HTTP Request Support

Send:

GET
POST
PUT
PATCH
DELETE

Quickly test REST APIs and endpoints with a fast and intuitive request builder.

JSON Response Viewer

Inspect formatted JSON responses with:

Syntax highlighting
Readable formatting
Status codes
Response timing
Error details

Easily debug API issues and verify responses in real time.

Authentication Support

Connect to secured APIs using:

Bearer Tokens
Basic Authentication
Custom Headers

Perfect for testing authenticated endpoints and protected services.

Advanced Request Builder

Configure:

Headers
Request body data
Content types
Authorization
Query parameters

Designed for fast mobile API development and debugging.

Built for Developers

API Tester is ideal for:

REST API testing
Backend debugging
Mobile development
QA testing
JSON inspection
Endpoint validation
HTTP request testing
Fast, Clean and Mobile Friendly

Whether you're working remotely, debugging on the go, or quickly checking an endpoint, API Tester delivers a smooth and responsive mobile experience.

No complicated setup. Just launch the app and start testing APIs instantly.

Download API Tester today and simplify REST API testing on Android.

What’s new

cURL Import: Quickly import requests using the new cURL tool.

Save Requests: Save your favorite configurations for easy access.

Params Tab: New dedicated tab for managing query parameters.

Response View: Added both JSON and Preview tabs for non-JSON returns.

History: You can now view and revisit your previous requests.

UI Improvements: Refined interface with system theme recognition (Dark/Light mode).