Question: Is there a tool that can automatically generate comprehensive test suites for my API from my existing API specs?

If you need a tool to generate a full-featured test suite for your API based on your existing API documentation, Kusho is worth a look. Kusho is an AI-powered agent that converts API documentation into full-featured test suites, bypassing manual testing and integrating with existing development workflows. It accepts input files like Postman collections, OpenAPI specs and cURL commands, and can be prompted with basic API information to generate test code. This tool is geared for developers and test teams that want to automate API testing and keep releases at a high level of quality without sacrificing time and effort.

Another contender is ReAPI, an AI-augmented system for designing, testing and documenting APIs. ReAPI has a no-code test case designer for complex logic flows, a serverless cloud runner and detailed test reports. It also can generate API documentation, creating visually appealing and accurate documentation. This tool is geared for teams working on API design, with built-in debugging tools and AI-assisted design to help ensure high-quality and efficient API design.

If you need a broader testing solution, SmartBear has a range of tools for API design, testing and monitoring. Its API Hub includes products like SwaggerHub and PactFlow for designing and testing APIs. SmartBear's tools are well integrated with popular development tools and frameworks, so it's good for small and large projects. The platform is designed to be flexible and accessible, with a strong focus on open-source projects and community support.

Last is Conektto, an API design platform that automates API integrations through generative design, code and test abilities powered by AI. Conektto includes tools like API Design Studio, API Test Harness and Hybrid API Orchestrator that are geared for product managers, architects, developers, testers and DevOps teams. It's geared for enterprise-class API development, but there's a free Community Edition for lighter use, and a Pro Plan for more advanced abilities.