Best API testing AI tools

Test API integrations, webhooks, and workflows via MCP in your IDE without real API keys or quota.

TestPlan is a powerful, AI-powered tool designed to instantly transform project requirements into comprehensive, actionable test plans and detailed test cases. It supports a wide range of test types, from functional to security, making software testing more efficient for development teams.

Swytchcode is an AI solutions engineer designed for API and SDK publishers to streamline API consumption. It automates code generation for 15+ languages, simplifies complex integrations, and reduces support overhead. Publishers can manage APIs, create interactive playgrounds, and enable AI-API communication, significantly boosting developer adoption and cutting costs.

TestNeo is an AI-powered test automation platform that transforms natural language inputs into executable test scripts. It streamlines the testing process by eliminating manual scripting, offering self-healing automation, intelligent reporting, and seamless cloud execution. Designed for both technical and non-technical users, TestNeo accelerates API and performance testing, ensuring robust software quality with minimal effort.

Katalon is a comprehensive, AI-augmented test automation platform for web, API, mobile, and desktop applications. It empowers teams of all sizes with low-code, full-code, and no-code solutions, streamlining the entire quality lifecycle from test creation and execution to analysis and management.

Aspen is a free, native macOS application for API testing, supercharged with an AI assistant. It offers a fast, private, and efficient way to test REST APIs, generate code, create data models, and produce OpenAPI specs without requiring a login.

Kusho is an AI-powered platform that automates software testing for developers and enterprises. It uses autonomous AI agents to transform inputs into comprehensive, ready-to-run test suites for both web UIs and backend APIs. By automatically generating and maintaining tests, Kusho helps teams achieve over 90% test coverage, accelerate deployment cycles, and ship bug-free code with confidence.

roost is an AI-powered testing copilot that leverages Large Language Models (LLMs) to automate the generation of unit and API test cases. It helps development teams achieve 100% test coverage, detect static vulnerabilities, and accelerate release cycles by integrating seamlessly into existing DevOps workflows.

Testkit is an AI-powered platform designed to automate the software testing lifecycle. It helps development and QA teams generate, execute, and maintain test cases with greater speed and accuracy, significantly reducing manual effort and accelerating the delivery pipeline.

A former generative testing platform for computer vision APIs that allowed developers to create custom synthetic images and API requests to streamline testing workflows. Please note: This tool is no longer available.

Qodex is an AI-powered platform that simplifies and accelerates API testing and security. It automatically discovers your APIs, generates comprehensive tests from plain English prompts, and integrates seamlessly into your developer workflow. Reduce test creation time by 80% and ship bug-free software faster.

Devzery is an AI-powered platform that automates API functional regression testing. Its self-driving AI agent streamlines end-to-end testing, integrates with CI/CD pipelines, and provides codeless automation. It's designed to accelerate software release cycles, reduce development costs, and enhance test management efficiency by identifying bugs early and ensuring flawless API performance.

An AI-powered platform designed for software testers and QA professionals to accelerate the software testing lifecycle. It automates the creation of test cases, scenarios, test data, and even automation code from simple requirements. It supports various testing types, including functional, API, security, and performance, aiming to increase test coverage and efficiency.

FlowTestAI is the first open-source, GenAI-powered IDE for API-first workflows. It allows developers to describe end-to-end user experiences in natural language and automatically translates them into executable API tests. Featuring a visual interface, CLI for CI/CD integration, and an analytics dashboard, it simplifies API testing, enhances collaboration, and prioritizes privacy with local operation.

An AI-powered platform that automates API governance by enforcing best practices and industry standards. Trained on 10,000 public APIs, it detects and resolves critical design and implementation issues, helping teams deliver consistent, high-quality APIs faster.

Testsigma is a unified, AI-powered test automation platform that enables teams to create, run, and maintain tests for web, mobile, API, and ERP applications without code. It uses AI agents to accelerate test generation, reduce maintenance by 90%, and achieve end-to-end testing on a massive scale.

Celerforge is an AI-powered platform that enables developers to create mock APIs at lightning speed. By simply describing API requirements in natural language, users can instantly generate realistic, fully functional mock endpoints and data, significantly accelerating prototyping and frontend testing.

QAEverest is an AI-powered, low-code/no-code platform designed to revolutionize software testing. It automates the entire testing lifecycle, from generating comprehensive test cases for functional, system, API, performance, and security testing to executing UI, API, and mobile app automation. It aims to increase test coverage, accelerate workflows, and significantly reduce time and costs for QA teams.

Scalar is an open-source developer platform for creating beautiful, interactive API documentation from OpenAPI/Swagger specifications. It features a built-in, offline-first API client for seamless testing, extensive customization options, and integrations with popular frameworks, streamlining the entire API lifecycle.