Best Free API Testing Tools of 2024

Engineered for peak performance and efficient resource use, KrakenD can manage a staggering 70k requests per second on just one instance. Its stateless build ensures hassle-free scalability, sidelining complications like database upkeep or node synchronization. In terms of features, KrakenD is a jack-of-all-trades. It accommodates multiple protocols and API standards, offering granular access control, data shaping, and caching capabilities. A standout feature is its Backend For Frontend pattern, which consolidates various API calls into a single response, simplifying client interactions. On the security front, KrakenD is OWASP-compliant and data-agnostic, streamlining regulatory adherence. Operational ease comes via its declarative setup and robust third-party tool integration. With its open-source community edition and transparent pricing model, KrakenD is the go-to API Gateway for organizations that refuse to compromise on performance or scalability.

Tyk is an Open Source API Gateway and Management Platform that is leading in Open Source API Gateways and Management. It features an API gateway, analytics portal, dashboard, and a developer portal. Supporting REST, GraphQL, TCP and gRPC protocols We facilitate billions of transactions for thousands of innovative organisations. Tyk can be installed on-premises (Self-managed), Hybrid or fully SaaS.

You can use your favorite debugging software to locally troubleshoot your Kubernetes services. Telepresence, an open-source tool, allows you to run one service locally and connect it to a remote Kubernetes cluster. Telepresence was initially developed by Ambassador Labs, which creates open-source development tools for Kubernetes such as Ambassador and Forge. We welcome all contributions from the community. You can help us by submitting an issue, pull request or reporting a bug. Join our active Slack group to ask questions or inquire about paid support plans. Telepresence is currently under active development. Register to receive updates and announcements. You can quickly debug locally without waiting for a container to be built/push/deployed. Ability to use their favorite local tools such as debugger, IDE, etc. Ability to run large-scale programs that aren't possible locally.

It works: Codeless testing Give your entire team the ability to create and maintain automated tests. Not just developers. Meet your testing demands fast. You can get full coverage of your tests in days and not months. Our natural-language tests are very resistant to code changes. Our AI will quickly repair any test failures. Continuous Testing is a key component of Agile/DevOps. Push features to production in the same day. Boozang supports the following test approaches: - Codeless Record/Replay interface - BDD / Cucumber - API testing - Model-based testing - HTML Canvas testing The following features makes your testing a breeze - In-browser console debugging - Screenshots to show where test fails - Integrate to any CI server - Test with unlimited parallel workers to speed up tests - Root-cause analysis reports - Trend reports to track failures and performance over time - Test management integration (Xray / Jira)

Testim is the fastest way to create resilient end-to-end test cases, whether they are codeless or coded. Testim allows you to create codeless, stable tests that leverage our AI. You also have the option to export your tests as code. Testim's JavaScript API is available to you and your IDE. This allows you to debug, modify, or refactor your tests. To keep them in sync, store them in your version control system. Run tests on every commit. Testim is used by millions of customers every month, including NetApp, Wix and JFrog. Find out more on our website.

ZAPTEST is a leading Free and Enterprise software test automation and RPA tool. Computer Vision technology allows cross-platform digital interface automation for UI and API. This combined with our 1SCRIPT methodology, seamless automation, parallel execution, and unlimited licenses, will result in a testing suite that generates up to 10X ROI. ZAPTEST will automate any procedure you can do via any digital interface (live app or mockup). Discover the unparalleled advantages of partnering with ZAPTEST Our partners are essential in providing businesses with innovative, industry-leading automation solutions that transform software testing and RPA processes. ZAPTEST empowers organizations with a unified automation platform that streamlines both software testing and business operations. Our unlimited licensing model ensures you can scale effortlessly, transforming your business into an agile, efficient powerhouse.

Ambassador Edge Stack, a Kubernetes-native API Gateway, provides simplicity, security, and scalability for some of the largest Kubernetes infrastructures in the world. Ambassador Edge Stack makes it easy to secure microservices with a complete set of security functionality including automatic TLS, authentication and rate limiting. WAF integration is also available. Fine-grained access control is also possible. The API Gateway is a Kubernetes-based ingress controller that supports a wide range of protocols, including gRPC, gRPC Web, TLS termination, and traffic management controls to ensure resource availability.

API Tester is a mobile app for IOS and Android for testing and using APIs. It's a completely free API testing tool with a minimalistic interface and, at the same time, rich functionality that allows users to do very complex tasks on a small screen. - Test all types of APIs: REST, GraphQL, WebSocket, SOAP, JSON RPC, XML, HTTP, and HTTPS. - Perform all HTTP request methods: GET, POST, PUT, PATCH, DELETE, HEAD, etc. - Make the API calls with any kind of request data encoding and transfer type like query params, FormData, raw data, etc. Advanced settings allow you to skip TLS, disable redirects, and adjust timeouts. - Import requests or collections by cURL, link, or file from your device: Swagger, OpenAPI, Postman, and YAML collections are supported. - Share requests in a second using a deep link and cURL command. - Powerful GraphQL editor with full-scale experience: body editor with Queries, Mutations, Subscriptions, and syntax support; variables editor, documentation. - WebSocket testing tool is available too: handles connection and message exchange via WS or WSS. So you can easily connect with APIs you are working with from everywhere in the world and leave your laptop at home!

Telerik Fiddler HTTP (S) proxy can capture all HTTP(S), traffic between your computer & the Internet. You can inspect traffic, set breakpoints and play with requests & replies. Fiddler Everywhere is a web-debugging proxy that works on macOS, Windows and Linux. You can capture, inspect, monitor, and analyze all HTTP(S), traffic between your computer, the Internet, and mock requests. Fiddler Everywhere is compatible with any browser, app, or process. You can debug traffic from macOS or Windows systems, as well as iOS or Android mobile devices. Make sure that the appropriate cookies, headers, cache directives and headers are sent between the client's and server. Any framework is supported, including.NET and Java, Ruby, and others. You can mock or modify any website's requests and responses. It's quick and easy to modify the requests and responses on any website without having to change the code. Fiddler Everywhere allows you to log all HTTP/S traffic between the computer and the Internet.

Xano offers a fully-managed, scaleable infrastructure that powers your backend. You can also quickly create the business logic that powers your backend with Xano without writing a single line or use one our pre-made templates to launch quickly and without compromising security or scale. You can quickly create custom API endpoints with just one line of code. Our out-of-the box CRUD operations, Marketplace extensions and templates will accelerate your time to market. Your API is "ready-to use" so you can connect to any frontend immediately and concentrate on your business logic. Swagger automatically documents everything so that you can connect to any frontend easily. Xano uses PostgreSQL, which offers the flexibility of a relational and the Big data needs that a NoSQL solution. You can add features to your backend with just a few clicks. Or, you can use pre-made templates and extensions to jumpstart the project.

Alithya GoTest is a collaborative test hub that is easy and quick to master and integrate, ensuring the quality of any professional digital solutions for companies requiring reliability without compromises. Through the GUI, our solution allows you to collaborate, execute and fix your tests and communicate at all levels to ensure test plans and test results are provided with the right level of details. Alithya GoTest is platform-agnostic and will allow you to seamlessly test desktop, web and mobile applications. You will not have to spend months building, maintaining and integrating your test platform into your development workflow, which allows your development team to focus on delivering value and quality. Compared to more traditional solutions, Alithya GoTest is the only tool on the market that allows you to completely test your software from end-to-end using continuous testing in a DevOps process. Contact our top-notch bilingual support team or use our consulting, coaching or online training resources to get up to speed in no time. Benefit from our growing list of pre-made test suites for professional ERP platforms like Oracle Fusion Cloud to ensure updates are not breaking your software solution.

Collaboration platform for API development. You can simplify each step of building an app and streamline collaboration to create better APIs faster. Postman is an API development platform that allows you to collaborate with other users. Postman's features make it easier to build an API. They also streamline collaboration, so you can create better APIs faster. Postman allows you to quickly and easily send SOAP, REST, and GraphQL queries directly from Postman. Automate manual testing and integrate them into your CD/CI pipeline to ensure that no code changes will cause API problems in production. Simulating endpoints and the responses of APIs without needing to set up a backend server allows you to communicate the expected behavior. To make your API easier to use, generate and publish beautiful, machine-readable documentation. Keep track of the health of your API's performance and response times at regular intervals to keep you informed. Collaborate in real-time by creating a shared environment for API building and consumption.

Tuskr is a powerful and easy-to-use test management tool. You can manage test cases, conduct test runs, and even optimize your testing workload. You can also integrate with your current bug and time tracking software. Tuskr offers a free 30-day trial with sample data during the evaluation. It also offers a generous free plan.

Cerberus Testing automates continuous testing at scale with low-code software. The solution will eliminate the need to implement an internal testing framework for years. The product allows you to iterate quickly through your testing lifecycle: from test repository, execution, and reporting. The solution allows teams to collaborate from the use-cases creation to the execution of test cases on a variety of browsers and devices. To execute your test at scale, you can use your own or external robots infrastructure. This allows you to concentrate on your business value. It supports many integrations to speed up implementation, such as Bitbucket and Slack. It is open-source and maintained by many digital and retail players, including La Redoute and Decathlon, Adeo and Norauto.

Apidog is an integrated set of tools for the entire API Lifecycle. It helps R&D teams to implement best practices in API Design-first Development. Visually design and debug APIs. JSON Schema Support makes it easy to describe and debug APIs. Apidog's automated API lifecycle includes test generation based on API specs, visual assertions, built-in validation of responses, and CI/CD. Create visually appealing API documentation. Publish to a custom domain, or securely share with collaborative team. Local and cloud mock engines generate reasonable mock data based on field names and specifications, without writing scripts. Quality tools can unite your team and ensure that no task is repeated. Easily describe your API while you test it and generate JSON/XML Schemas with a single click. Create test cases using APIs, add assertions and create scenarios with branches and iterations.

Create and test HTTP web service calls. Use any spreadsheet to run data-based test cases, and then review the results. Include attachments, with or without MTOM. Test your tests and review the results at any time. Datat ransfer is a way to move data between test cases, test steps, folders, and test repositories. Format variables of all types, including strings, integers, time and date information, and even relative dates, with formatting options.

HttpMaster is a HTTP debugging and testing tool specialized in testing web API applications and REST web services. Core features: - HttpMaster project to store complete definition of request items. - Broad set of HTTP properties (HTTP headers, URL encoding, etc.). - Dynamic parameters to simulate variations of input data or create global API values. - Response data validation with logical expressions. - Request chaining to use data from previous request with the next request. - Extensive data upload support, including 'multipart/form-data'. - Request data builder for creating request body with an optional parameters. - Request item execution with detailed progress monitoring. - Execution groups to create batches of requests. - Comprehensive execution data review and management. - Basic request tool for ad-hoc execution. - Command line interface. - Support for PDF reports. - Support for cURL commands.

SyncTree strives to be a "Super Connecting Platform" that can easily connect any services you want. With SyncTree, which consists of SyncTree STUDIO, a solution for building backend business logic with block coding, and Block Store, a platform for buying and selling pre-made backend function blocks like App Store, you can organically utilize data and connect services to achieve unlimited service expansion.

Introducing Treblle: An agile Software Development Kit (SDK) crafted explicitly for expediting REST-based API development. This cutting-edge toolkit offers unparalleled insights into the intricate metadata of every API request, complemented by real-time monitoring of API traffic. Harness the potency of robust analytics and embrace comprehensive API governance functionalities. Unveil the realm of automated API documentation, empowering your venture with unparalleled efficiency. Treblle transcends the ordinary, introducing automated API security audits for every individual request. The art of streamlining workflows is now within your grasp, while bolstering your defenses through 18+ languages and frameworks, ensuring seamless integration for your enterprise. Elevate your teams' prowess in constructing, shipping, and upholding APIs, all accomplished with unprecedented swiftness.

This is the easiest way to monitor and test your web services. Assertible's automated QA tools will help you test and monitor your web service across different environments and deployments. This will give you confidence in your critical infrastructure. Assertible is your first line of defense against any web service failures. It provides simple and powerful assertions that allow you to monitor and test your APIs and websites. Reduce false positives in automated QA tests to ensure that your APIs are safe and healthy. Assertible makes it easy to keep your API tests current. As you add or update responses, parameters, headers and other information, updating your Assertible API test is as simple as clicking sync.

Stoplight is an API Design, Development, & Documentation platform. Stoplight Platform enables consistency, reuseability, quality, and ease in your API lifecycle. Here's what Stoplight Platform can do for you: Stoplight Studio's visual designer makes it easy to design APIs Stoplight Prism mocking allows you to automatically create mock API designs - Invite external and internal users to give feedback and collaborate on your designs - Create faster and more powerful APIs - Use Stoplight Spectral to test and enforce style guidelines To create a pleasant experience, document both internal and externe APIs automatically To quickly scale up API programs that are well-governed, standardized, and collaborative, you can use and integrate design-first workflows.

A single dashboard allows you to monitor the performance and status of your API endpoints and vital site transactions. Checkly is an active reliability platform which combines the best of active monitoring and end-to-end test to support modern, cross-functional DevOps teams. Checkly is easy-to-use and integrates seamlessly into your development workflow. It focuses on JavaScript-based Open Source tech stacks. Checkly is the API and E2E monitoring platform for modern stacks. It's programmable, flexible, and loves JavaScript. Validate and monitor critical site transactions. Take screenshots to get instant insight into what's working well and what's not. Coding browser click-flows used be difficult. It's not so difficult anymore. Automate your workflows with modern open-source frameworks such as Puppeteer and Playwright. You can run your checks in 20 locations around the world. Make sure your APIs respond quickly and correctly with the correct payload.

You can have a seamless experience with all types of tests. You can reuse the same test scripts regardless of whether you are testing a web application across thousands browser, OS and device combinations, validating APIs functionality, or running large load tests. Testable offers a cloud-based SaaS platform that is ready for enterprise use. You can run your tests on-prem or in the cloud using your favorite open-source software. We will handle the execution, real-time reporting and storage securely in our cloud. Our testing platform can be securely hosted on your infrastructure behind your firewall. Flexible, modern packaging options, including the Kubernetes Helm package, are available. You can run your functional test on multiple browsers, OS, and device combinations in one test run. A real-time report is available that includes videos and interactive sessions for each virtual user, screenshots and assertions, performance metrics, trend analysis and more.

Akto is an open source, instant API security platform that takes only 60 secs to get started. Akto is used by security teams to maintain a continuous inventory of APIs, test APIs for vulnerabilities and find runtime issues. Akto offers tests for all OWASP top 10 and HackerOne Top 10 categories including BOLA, authentication, SSRF, XSS, security configurations, etc. Akto's powerful testing engine runs variety of business logic tests by reading traffic data to understand API traffic pattern leading to reduced false positives. Akto can integrate with multiple traffic sources - Burpsuite, AWS, postman, GCP, gateways, etc.

Tigmat allows you to automate your tests without writing a single line. Tigmat supports Web applications, Android Web applications, and APIs. You can record both Web and Android applications. These tools allow you to change anything without having to worry about code. Test Execution is supported by more than 60 Real Android Devices as well as Windows, Linux, Firefox, Chrome and Edge to provide the best coverage. You can sign up for a free trial and use all the features to see if Tigmat is right for you. Each test is recorded in a video that you can view. Among the many features offered are CICD integration, user management and user management. Try Tigmat today and see how it can help you reach your goals.