API Testing Tools

Akita

Instantly understand your APIs.

An API observability tool that auto-generates specs and maps.

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Karate DSL

API Test Automation, Mocking, Performance Testing and more!

An open-source framework that combines API test automation, mocking, and performance testing.

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Httpie

The API testing client for humans.

A user-friendly command-line HTTP client and a web & desktop GUI.

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Karate

Test Automation Made Simple.

An open-source tool for API test automation.

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Postman

The Collaboration Platform for API Development.

An API platform for building and using APIs.

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Hoppscotch

Open Source API Development Ecosystem.

A free, fast, and beautiful API request builder.

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vREST

Automated API Testing, Simplified.

A tool for automated testing of REST/HTTP APIs, with mocking and CI/CD integration.

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Insomnia

The Open Source API Client and Design Platform.

A collaborative API design and testing tool.

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Swagger UI

Visualize and interact with your API's resources.

An open-source tool to render OpenAPI specifications as interactive API documentation.

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Assertible

Continuous API Testing and Monitoring.

An automated API testing and monitoring tool.

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ACCELQ

AI-Powered Codeless Test Automation and Management Platform.

A cloud-based continuous testing platform for API, web, mobile, and backend automation.

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Gatling

The best-in-class load testing tool for any web application.

A developer-focused, code-based load testing tool.

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Katalon Studio

The all-in-one test automation platform.

A comprehensive test automation tool for various platforms.

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Apigee

API Management Platform.

A comprehensive API management platform that includes API testing capabilities.

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Firecamp

The DX-First API Development Platform.

An API client for GraphQL, WebSocket, and Socket.IO.

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Advanced REST Client (ARC)

A simple, powerful, and free API client.

An open-source API client that started as a Chrome extension and is now a standalone desktop app.

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RapidAPI Testing

Comprehensive API testing, from development to deployment.

A cloud-based API testing solution from the RapidAPI hub.

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Apigee API Management

Design, secure, analyze, and scale APIs anywhere with visibility and control.

Google's platform for developing and managing APIs.

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SwaggerHub

The API Design and Documentation Platform, Built for Teams.

A collaborative platform for API design and documentation.

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MuleSoft Anypoint Platform

The #1 platform for APIs and integrations.

A unified platform for integration, API management, and automation.

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ReadyAPI

One Platform to Accelerate API Quality.

A platform for functional, security, and performance API testing.

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SoapUI

The World's Most Popular API Testing Tool.

Open-source tool for testing SOAP and REST APIs.

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Tricentis Tosca

AI-powered, codeless test automation.

An enterprise-focused, model-based test automation tool.

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BlazeMeter

Continuous Testing at Enterprise Scale.

A continuous testing platform for performance, functional, and API testing.

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JMeter

Apache JMeter, a 100% pure Java application designed to load test functional behavior and measure performance.

An open-source Java application for load testing and performance measurement.

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Apache JMeter

Open source software to load test functional behavior and measure performance.

A popular open-source tool for load and performance testing.

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Sauce Labs API Testing

Ensure API quality from design to deployment.

A platform for API testing and monitoring.

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Testfully

Powerful API Client and Automated Testing Tool for Busy Developers.

A modern tool for the entire API lifecycle.

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Nightingale

A modern, fluent REST client for Windows.

A native Windows 10/11 REST client with a focus on modern design and performance.

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