List of the Top Free API Testing Tools in 2025 - Page 2

Test Mace is a modern and versatile cross-platform tool specifically designed for engaging with APIs and automating tests related to them. It empowers users to create requests and scenarios while offering features like variable management, authentication options, an autocomplete function, and syntax highlighting for ease of use. The interface is intuitive, making it easier to develop complex testing scenarios. With just a single click, users can run extensive regression tests, and the results from those tests can be conveniently saved in variables accessible from multiple nodes. Authorization tokens, response headers, and selected parts of response bodies can also be stored, which significantly boosts testing efficiency. Scenarios can be executed in various environmental contexts, facilitating effective management across development, staging, and production environments. Moreover, the tool includes built-in authentication methods that support the most common authentication types, simplifying the setup process for users. A key feature is the quick share functionality, which allows users to effortlessly share requests with team members by simply clicking a button to copy the URL of a specific node, thus fostering easy distribution among colleagues. This streamlined collaboration is vital for successful teamwork, ultimately enhancing productivity throughout the API testing process. Test Mace not only simplifies individual tasks but also cultivates a more cohesive working environment among teams.

Leverage our script generator to create a testing script using either JavaScript or CoffeeScript, which will set up the request parameters and validate the responses received. Ping-API is tailored to run your test scripts on global servers situated in the United States, Japan, Germany, and Singapore, providing a thorough testing environment for your APIs. You can also plan these tests to keep track of your APIs' performance metrics. Should a test encounter a failure, we will quickly send out failure notifications via email, Slack, and HipChat. With Ping-API, you have the freedom to write your test scripts in JavaScript or CoffeeScript, allowing you to define the request URL parameters, headers, and body, while also checking the response headers and body for validation. The script generator streamlines the creation process, enabling you to concentrate on configuring your API parameters, as it will generate the necessary test script automatically. It is designed with user-friendliness in mind, catering to web developers who need prompt alerts when their website faces downtime or when an unexpected response arises. Furthermore, Ping-API empowers you to schedule tests at regular intervals of either every minute or hour, guaranteeing that you receive timely alerts if there are any problems with your API tests. This comprehensive approach ensures that you can rely on us to help maintain the smooth operation of your services while minimizing downtime. The combination of powerful features and ease of use makes Ping-API an indispensable tool for any developer looking to optimize API performance.

Stoplight serves as a comprehensive platform for API design, development, and documentation. The Stoplight Platform fosters consistency, reusability, quality, and simplicity throughout the API lifecycle. Here’s how the Stoplight Platform can benefit your team: With Stoplight Studio's intuitive visual designer, crafting APIs becomes a straightforward task. The Stoplight Prism tool enables the automatic generation of mock API designs, enhancing your workflow. You can invite both internal and external collaborators to provide feedback and engage in the design process. This leads to the creation of APIs that are not only faster but also more robust. Additionally, by utilizing Stoplight Spectral, you can thoroughly test and uphold style guidelines. Automated documentation for both internal and external APIs ensures a seamless experience for all stakeholders. To efficiently scale API initiatives that are well-governed and collaborative, integrating design-first workflows is essential. This approach not only streamlines the process but also enhances overall productivity and collaboration among teams.

Monitor the effectiveness and health of your API endpoints along with vital website transactions through a single, intuitive dashboard. Checkly operates as a proactive reliability platform that combines the benefits of end-to-end testing with ongoing monitoring, making it ideal for modern, cross-functional DevOps teams. Focused on JavaScript-based open-source technology stacks, Checkly ensures a hassle-free setup and integrates effortlessly into your current development workflows. As the preferred solution for API and comprehensive monitoring in today’s dynamic environments, Checkly is highly programmable, versatile, and passionately supports JavaScript. Safeguard your critical website transactions with continuous monitoring and validation while also taking advantage of automatic screenshots that provide instant insights into your operational performance. Streamlining browser click-flow automation has never been simpler; make use of cutting-edge open-source tools like Playwright and Puppeteer for flawless automation. You can run your monitoring checks from 20 different locations around the globe, ensuring that your APIs not only respond quickly but also deliver accurate data payloads consistently. By utilizing Checkly, you can significantly improve the reliability and performance of your web applications, all while making your testing procedures more efficient. This enhanced capability allows teams to focus more on development rather than troubleshooting, thus fostering innovation and productivity.

The rise of hackers targeting vulnerabilities within API frameworks is alarming. To protect sensitive information and prevent data breaches, it is crucial to implement robust security measures for APIs. APIsec excels in identifying critical weaknesses in API logic that could be exploited by cybercriminals to gain unauthorized access to private data. Unlike traditional security solutions that mainly address common threats such as injection attacks and cross-site scripting, APIsec thoroughly examines the entire API, making sure that every endpoint is secured against potential exploitation. Leveraging APIsec allows you to identify possible vulnerabilities in your APIs before they are launched, thereby thwarting hackers before they can strike. APIsec evaluations can be performed at any stage of the development lifecycle, helping to uncover weaknesses that might unintentionally permit malicious individuals to access sensitive information. Integrating security does not have to slow down the development process; APIsec aligns seamlessly with DevOps methodologies, offering continuous visibility into API security. Instead of relying on scheduled penetration tests, which can take time, APIsec provides swift feedback in a matter of minutes, allowing developers to work quickly while still safeguarding their APIs. By adopting APIsec, organizations can achieve an effective equilibrium between security and efficiency in their development processes, ensuring that they remain resilient against evolving threats. This proactive approach not only enhances security but also fosters a culture of vigilance and responsibility within development teams.

TeejLab is at the forefront of combining data science and machine learning to help organizations effectively manage the intricacies of the API economy. As the only solution globally tailored for API governance, we encourage you to evaluate your security and compliance measures concerning mainframe and legacy systems that interact with both internal and external information systems via APIs. Our groundbreaking software composition analysis tool is uniquely designed to identify shadow, hidden, private, and public APIs through a carefully developed knowledge base. Similar to how Google changed the game for websites, TeejLab is poised to transform the landscape of Web APIs. Our adaptable product suite meets the varied API governance needs of businesses and communities affordably, while also enabling the easy integration of new features as requirements evolve. Whether your organization seeks to discover and benchmark APIs or is an established producer or consumer aiming to enhance its offerings, we provide an all-encompassing solution tailored to drive your success. By leveraging our expertise, we empower organizations to confidently navigate the rapidly evolving digital environment and seize new opportunities for growth. Ultimately, our commitment is to ensure that you stay ahead in this dynamic landscape.

You have the option to send API test requests either through the user interface form or by invoking the EthicalCheck API using tools like cURL or Postman. To submit your request successfully, you'll need a publicly accessible OpenAPI Specification URL, a valid authentication token that lasts at least 10 minutes, an active license key, and your email address. The EthicalCheck engine autonomously conducts security tests tailored for your APIs based on the OWASP API Top 10 list, efficiently filtering out false positives from the results while generating a concise report that is easy for developers to understand, which is then delivered directly to your email inbox. According to Gartner, APIs are the most frequently targeted by attackers, with hackers and automated bots taking advantage of vulnerabilities, resulting in significant security incidents for many organizations. This system guarantees that you view only authentic vulnerabilities, as any false positives are systematically removed from the results. Additionally, you can create high-caliber penetration testing reports that are suitable for enterprise-level use, enabling you to share them confidently with developers, customers, partners, and compliance teams. Employing EthicalCheck can be compared to running a private bug-bounty program that significantly enhances your security posture. By choosing EthicalCheck, you are making a proactive commitment to protect your API infrastructure, ensuring peace of mind as you navigate the complexities of API security. This proactive approach not only mitigates risks but also fosters trust among stakeholders in your security practices.

Akto is a rapid, open-source API security platform that enables users to set up in just one minute. Security teams utilize Akto to keep an ongoing inventory of APIs, assess them for vulnerabilities, and identify issues during runtime. The platform includes tests for all categories from the OWASP Top 10 and HackerOne Top 10, such as Broken Object Level Authorization (BOLA), authentication flaws, Server-Side Request Forgery (SSRF), Cross-Site Scripting (XSS), and various security configurations. With its robust testing engine, Akto conducts a range of business logic tests by analyzing traffic data to discern API usage patterns, effectively minimizing false positives. Additionally, Akto supports integration with a variety of traffic sources, including Burpsuite, AWS, Postman, GCP, and various gateways, enhancing its usability across different environments. This adaptability makes Akto a valuable tool for ensuring the security of APIs in diverse operational settings.

Tigmat enables you to automate your testing processes effortlessly, requiring no coding skills at all. This platform accommodates a variety of applications, including Web, Android Web, and APIs, allowing for seamless recording of both Web and Android platforms. With Tigmat, you can modify any aspect of your tests without the need to delve into the underlying code. The service provides extensive test execution capabilities across over 60 real Android devices, along with support for Windows, Linux, Firefox, Chrome, and Edge, ensuring comprehensive coverage. You can easily register for a free trial to explore all features and determine if Tigmat meets your needs. Every test you conduct is captured in a video format for your review, adding an extra layer of convenience and clarity. Among the numerous functionalities available are CI/CD integration and effective user management options, which enhance the overall testing experience. Experience the benefits of Tigmat today and discover how it can facilitate your objectives more efficiently.

Enjoy effortless navigation through a clean and structured interface that allows you to focus on crucial elements for efficiently testing and collaborating on APIs. Firecamp boasts a user-friendly design complemented by a broad array of powerful features that streamline the API development process and enhance collaboration among team members. You have the flexibility to dynamically set variable values across the platform, promoting consistency and simplifying access. Moreover, you can craft visually appealing API documentation to share not just with your team, but also with the larger community. Perform API Collection Tests directly from the terminal or seamlessly integrate them into your CI/CD pipeline, all while testing and troubleshooting your authentication endpoints with support for various authentication methods. This holistic approach not only enhances productivity but also nurtures a collaborative atmosphere for API development, ensuring that all team members can contribute effectively. Furthermore, the platform continually evolves to incorporate user feedback, making it an ideal choice for developers seeking to improve their workflow.

Transform your API experience by leveraging our comprehensive, enterprise-level One APIMarketplace, designed to streamline consumption, promote collaboration, and enhance the overall developer experience. This innovative platform addresses challenges associated with API sprawl and reduces complexities by operationalizing APIs, making them easily discoverable, consumable, and accessible for teamwork. By facilitating a quicker time to market, One APIMarketplace significantly enhances API adoption through improved accessibility, detailed performance metrics, and heightened consumption rates. Empower developers with comprehensive documentation, community engagement, essential resources, SDKs, and sandbox environments to accelerate the adoption process even further. One APIMarketplace not only simplifies the process of discovering and using APIs but also ensures a smooth experience for both developers and enterprises alike. With thorough documentation and the option to test APIs in a sandbox environment before full integration, users can advance their projects with confidence. Moreover, our powerful analytics dashboard delivers crucial insights into API utilization, performance metrics, and user engagement, enabling strategic decision-making. This holistic approach ensures that your API initiatives are not only efficient but positioned for success in a dynamic digital landscape.

Testfully provides a wide range of features, including a powerful API client and advanced testing and monitoring tools. Users benefit from flexible storage options, both in the cloud and offline, which facilitate smooth collaboration among teams and enable easy migration, all through a single, comprehensive multi-platform solution. The platform enhances the process of moving data from Postman or Insomnia for effortless integration into Testfully. With an emphasis on adaptability and security, it allows users to define global, environment, and folder variables that can be customized for specific workspaces or individual accounts. Furthermore, users have the ability to tailor authentication methods, parameters, headers, and body content easily, making it simple to craft any HTTP request. Team collaboration is seamless as members can be invited, assigned distinct roles, and folder permissions can be effectively managed. Testfully accommodates major authorization protocols like OAuth2, providing secure access management capabilities. This makes it suitable for users tackling both simple tasks and complex scenarios, as the tool simplifies the testing process without necessitating any programming knowledge, making sophisticated API testing more accessible and user-friendly. Users also have the option to execute requests in a folder simultaneously, sequentially, or in random order with just one click, which significantly boosts efficiency. In addition, it supports response validation and contract testing using a declarative format, further reducing the need for coding and enhancing the overall testing experience. Ultimately, Testfully is crafted to serve both beginners and seasoned professionals, ensuring that all users can effectively harness its powerful features. Moreover, its intuitive interface allows for a quick learning curve, making it easier for newcomers to get started.

Elevate your software development experience with our robust API solution, ensuring stability, exceptional performance, and reliability in every iteration. Enjoy seamless integration with CI/CD practices to forge a comprehensive development pipeline. API Swan is dedicated to creating a software testing platform that balances cost-effectiveness with reliability, specifically designed for engineering teams navigating the fast-paced environment of early-stage startups. Boost your product delivery speed by a factor of ten while easily detecting and fixing a greater number of bugs. Our continuous application monitoring guarantees consistent and uninterrupted functionality around the clock. The platform intelligently generates regression tests from network activity, offering an innovative method for automated test case development that seamlessly fits within your current workflow. Moreover, the automatic documentation of APIs and schemas not only improves understanding but also saves precious time for your team. With API Swan, your development process transforms into a more efficient and streamlined operation than ever before, paving the way for future innovations and improvements. Our commitment to enhancing your workflow ensures that you remain competitive in a rapidly evolving industry.

Pynt is a cutting-edge API Security Testing Platform that unveils authenticated API vulnerabilities through simulated attacks. We assist numerous organizations, such as Telefonica, Sage, and Halodoc, in consistently monitoring, classifying, and preemptively addressing inadequately secured APIs before malicious hackers can exploit them. Leveraging a distinctive hacking methodology and an integrated shift-left approach, Pynt employs proprietary attack scenarios to identify genuine threats. In addition, it facilitates the discovery of APIs and provides recommendations for rectifying confirmed vulnerabilities. With the trust of thousands of businesses, Pynt plays a crucial role in safeguarding their applications. Many companies incorporate Pynt into their application security strategies to ensure robust protection against potential threats. This reliance on Pynt underscores its importance in the ever-evolving landscape of API security.

Hoverfly Cloud, a software-as-a-service offering from iOCO, assists organizations in speeding up delivery, reducing costs, and developing strong software more efficiently. Designed with a focus on integration, automation, and performance, Hoverfly Cloud allows developers and testers to replace the APIs their applications depend on with flexible, lightweight simulations. By doing this, it effectively decouples the development and testing stages from unreliable and expensive testing systems, as well as restrictive API sandboxes. The platform provides the capability to configure API simulations that replicate unpredictable behaviors, such as significant latency or random failures, thereby ensuring that applications can manage disruptions gracefully when their dependent APIs experience issues. With its remarkably low operational costs, even through demanding and complex testing scenarios, Hoverfly Cloud facilitates the rapid creation of API mocks and simulations, enabling users to achieve this in just minutes with a comprehensive testing solution that avoids unnecessary complications. This streamlined approach not only optimizes the testing workflow but also significantly boosts the overall quality and dependability of the software, ultimately leading to more robust applications in the marketplace. Moreover, by enhancing collaboration between development and testing teams, Hoverfly Cloud fosters a more agile and responsive software development lifecycle.

Quickly set up endpoints, generate customized data, and perform operations through a RESTful interface. Define the resource structure along with data generators for each individual field. Create connections between resources while automatically producing the relevant endpoints. MockAPI acts as a user-friendly platform that allows individuals to easily simulate APIs. This tool is crafted to support prototyping, testing, and educational endeavors, thereby enhancing the development workflow. Ideal for both developers and students, it offers a valuable resource for tackling various API-related challenges effectively. Additionally, its intuitive design ensures that users can maximize their productivity while minimizing potential obstacles during the development process.

Sparrow offers a robust suite of tools aimed at optimizing the entire API lifecycle, assisting research and development teams in achieving superior outcomes in design-first API creation. Users can leverage cURL to effortlessly send API requests while utilizing vital methods like GET and POST. The platform enhances API interactions by effectively handling headers, data, and authentication processes. As an open-source collaborative platform for API development, Sparrow facilitates the efficient creation of exceptional APIs. With teamwork at the forefront, developers can enhance their methodologies early in the development timeline, leading to stronger APIs and quicker delivery times. Additionally, users benefit from smooth parallel testing across multiple environments, enabling them to collect crucial insights in real-time. Sparrow also provides powerful tools for securing and managing API data, along with self-hosting options that allow full control over testing environments. Moreover, developers can stay updated with the latest enhancements, insights, and resources offered by Sparrow, enriching their overall development experience. This dedication to ongoing improvement guarantees that developers have access to the most effective practices and cutting-edge innovations in the realm of API development, fostering a culture of continuous learning and adaptation.

Hoppscotch streamlines the creation and testing of APIs, allowing for faster product launches and enhanced efficiency. You can build APIs rapidly, perform instant tests, and automatically document and share your projects with ease. Whether you're working on initial prototypes or preparing for final production, everything you need for smooth API development is conveniently provided by Hoppscotch, eliminating the need to switch between multiple tabs. The platform allows for the establishment of dedicated workspaces tailored for your teams, offering customizable access controls as necessary. Real-time collaboration with colleagues is facilitated, leading to improved teamwork and productivity. Additionally, you have the option to deploy Hoppscotch on your own servers, providing you with greater flexibility and control. Organizing requests into collections or folders makes it easy to share with team members, while managing environment variables ensures consistency throughout your projects. You can also maintain a comprehensive record of your request history for quick reference. With the ability to modify headers, authenticate requests, generate random data, and explore an array of other features, thorough API testing is easily achievable, including writing assertions to verify responses. Hoppscotch accommodates over 30 languages, making it accessible in your preferred language. You can monitor all activities within your workspace, noting who performed actions and when, enhancing accountability. The integration of your existing SSO provider simplifies login processes, allowing for efficient user, workspace, and resource management. Moreover, the platform’s user-friendly interface ensures that both beginners and seasoned developers can navigate it without difficulty, making API development a more enjoyable experience overall. This comprehensive suite of features, combined with its adaptability, truly makes Hoppscotch a valuable tool for any development team.

Qodex.ai is a groundbreaking platform that utilizes AI technology to significantly improve the effectiveness of API testing and documentation, offering full automation without requiring any human intervention. Tailored for developers, it allows users to formulate tests in plain English, eliminating the need for programming expertise. The platform adeptly adapts to product changes, maintaining consistent test coverage over time. Users have the option to upload their current API files or utilize Qodex's SDK to create new APIs, which can be prepared for testing in mere minutes. The AI functionality smartly learns the API configuration and automatically produces tests, while also enabling the crafting of custom tests through simple English instructions. Tests can be run at any moment, yielding clear reports that allow for prompt identification and resolution of issues. In addition, the platform boasts interactive API documentation, enabling users to ask questions and obtain instant responses in an accessible format, making it an essential tool for both front-end and back-end testing. Moreover, its smooth integration into existing development workflows boosts productivity and streamlines the testing procedure, ultimately resulting in a more efficient development cycle. This innovative approach not only simplifies the testing process but also enhances the overall user experience.

Comprehensive test automation solution You can quickly initiate the process and scale it to accommodate any team size. Katalon Studio Reliable testing across all platforms Its efficient IDE simplifies the creation of automated tests for any platform or operating system, no matter the complexity of your application. A robust recording tool captures all UI elements in one location, enhancing reusability and efficiency. It offers a codeless experience for novices while allowing experts to expand their testing capabilities further. Project setup is straightforward. There are templates available that come with built-in functionalities. You can dive right in with pre-designed templates, libraries of test cases, keywords, object repositories, and various other helpful resources. All forms of end-to-end testing are centralized in one location, making it easy to execute both web and mobile testing within a single project. This makes the entire testing process streamlined and significantly more efficient for teams of any size.

BlazeMeter provides a robust, open-source solution designed for enterprises that integrates all critical features for effective left and right shift testing. The platform's intuitive interface allows users to easily create new tests or leverage existing scripts, running them at scale within a continuous testing framework. Furthermore, users can perform tests, produce detailed reports, and analyze historical data trends, enabling a greater focus on innovation rather than tool management. Continuous testing plays a crucial role in ensuring quality, volume, and speed in product delivery; however, managing multiple tools can consume valuable time and resources. BlazeMeter streamlines this complexity through a highly user-friendly platform that includes all necessary functionalities. It enables comprehensive shift-left testing, equipping users to captivate the market with innovative breakthroughs. Additionally, BlazeMeter supports interaction with CLIs, APIs, UIs, and a variety of open-source tools, facilitating a seamless workflow. By significantly reducing the time spent on setup, maintenance, and daily operations, users can experience enhanced efficiency. Ultimately, BlazeMeter not only boosts productivity but also elevates your testing strategy to unprecedented levels, positioning you for future success.

Eggplant enables organizations to craft exceptional digital experiences that captivate users. We assist businesses in tracking, evaluating, and enhancing their customer interactions effectively. Companies globally leverage Eggplant to surpass their rivals, boost efficiency, and provide outstanding customer satisfaction. So, how does Eggplant achieve this? It significantly elevates the quality, speed, and functionality of software applications across a variety of interfaces and platforms, including mobile devices, IoT, and desktops, all within agile, DevOps, and pioneering application and data environments. Additionally, Eggplant’s comprehensive approach ensures that organizations can adapt swiftly to changing market demands while maintaining high standards of performance.

In just thirty minutes, you can create an API and share it with your colleagues or clients, enabling them to interact with a mock version without needing to write any code. This interaction allows you to collect essential feedback that helps you refine your design prior to actual development, ensuring that the final product aligns with the requirements of your developers. Think of this mock as the very essence of your API—robust, open-source, and thoughtfully crafted for developers. It effectively merges the ease of Markdown with the functionalities of automated mock servers, along with testing, validation, proxies, and code samples across various programming languages. It can often be difficult to foresee how an API will be used until you actually engage with it within a coding environment. Similar to how wireframes are fundamental in UI design, a server mock plays a comparable role in API development, allowing for quick prototyping before any coding begins. With just two clicks, Apiary can be linked to any chosen repository, giving you the choice to maintain the privacy of your API Blueprint or to open it up for public collaboration. Each time you make a change, we ensure that your API documentation is consistently updated, and we automatically synchronize any commits to your repository whenever you modify something in Apiary. This creates a productive feedback loop that not only enhances the quality and functionality of your API but also streamlines the entire development process, making it more efficient and responsive to user needs. Ultimately, utilizing such a tool promotes a more iterative approach to API design, fostering continuous improvement and engagement throughout the development cycle.

With Loadmill, organizations can generate automated API tests directly from real user sessions, streamlining their development workflows while significantly increasing speed and automating previously manual testing processes by mimicking genuine user behavior. By re-executing thousands of user flow tests, Loadmill effectively addresses regression challenges, thereby reducing the time needed for regression cycles and allowing teams to focus on critical priorities. This approach not only minimizes costs associated with inefficient testing and maintenance but also ensures that regression tests are automatically generated from actual user interactions, enabling teams to operate more efficiently. Furthermore, by automating the entire quality assurance process through the recreation of authentic user actions, Loadmill integrates smoothly into continuous delivery pipelines, promoting quicker deployment of updates. By harnessing real traffic from websites around the globe, Loadmill facilitates rapid performance testing of your server, enabling tests to be launched in mere seconds and helping to identify bottlenecks before they impact production environments. Its distributed system allows the use of countless unique IP addresses and locations for each test, and it also provides the option to record and replay specific user scenarios on a large scale, ensuring thorough coverage and reliability in all testing initiatives. In addition, this capability fosters a more robust testing environment, empowering organizations to adapt to evolving user needs efficiently.

Bright Security offers a developer-focused Dynamic Application Security Testing (DAST) solution that enables companies to swiftly and cost-effectively deliver secure APIs and applications. Its innovative approach facilitates rapid and iterative scanning, allowing for the early detection of significant security vulnerabilities within the Software Development Life Cycle (SDLC), all while maintaining high standards of quality and delivery speed. By empowering Application Security (AppSec) teams with the governance needed to protect APIs and web applications, Bright also enables developers to take charge of security testing and remediation processes. In contrast to traditional DAST solutions, which were primarily created for AppSec experts and often uncover vulnerabilities late in the development timeline, Bright's solution is simple to implement and spans the entire SDLC, starting from the Unit Testing phase. It continuously learns from each scan, enhancing its effectiveness over time. This proactive approach not only aids organizations in identifying and addressing vulnerabilities at an early stage but also significantly mitigates risk and lowers costs associated with security breaches. Ultimately, Bright Security fosters a collaborative environment where security practices are integrated seamlessly into the development workflow.