API testing is a crucial aspect of modern software development, ensuring that applications communicate correctly and efficiently. For Mac users, finding the right API testing tool can significantly enhance the development workflow. In 2025, there are numerous robust tools designed to meet various testing needs, from simple API checks to comprehensive testing frameworks. Here's a detailed look at the top 20 API testing tools for Mac users this year, including their key features, pricing, and advantages.
1. Apidog
Apidog offers an intuitive interface and extensive testing capabilities, focusing on simplifying API development and testing. It's designed to streamline the entire API lifecycle, from creation to deployment.
Key Features:
- Automated testing (can be scheduled)
- Cloud & local mock server without the need for configuration
- Testing environment management
- Visualized UI for test orchestrations
- API design and documentation
- API debugging
- Team collaboration
Pricing: Free plan available; Paid plan starts at $9/user/month.
Advantages: Apidog is designed for ease of use, making it a great choice for developers looking to streamline their API testing process. Its mock server and documentation features are particularly beneficial for ensuring comprehensive testing and clear communication within teams.
Website: https://apidog.com/
2. Postman
Postman is a comprehensive API development environment used by millions of developers worldwide. It simplifies the process of building, testing, and monitoring APIs, offering an all-in-one solution that caters to every stage of the API lifecycle.
Key Features:
- Automated testing
- API monitoring
- Collaboration tools
- Mock servers
Pricing: Free plan available; Pro plan starts at $14/user/month.
Advantages: Postman's user-friendly interface and extensive feature set make it ideal for both individual developers and large teams. It supports a wide range of testing needs and integrates well with other development tools, making it a versatile choice for any development workflow.
Website: https://www.postman.com/
3. Paw
Paw is a full-featured HTTP client specifically designed for macOS, offering advanced scripting capabilities and a user-friendly interface. It is tailored for developers who need powerful tools to design and test APIs efficiently.
Key Features:
- Scripting with JavaScript
- Dynamic values and environments
- SSL client certificate support
- Customizable interface
Pricing: Free plan available; Paid plan starts at $10/user/month.
Advantages: Paw’s native macOS design ensures a seamless user experience, while its powerful features cater to advanced users needing detailed control over their API testing. Its one-time purchase model is also cost-effective in the long run.
Website: https://paw.cloud
4. Insomnia
Insomnia provides a clean, organized interface and supports multiple protocols, making it a versatile API testing tool. It is particularly popular for its simplicity and robust functionality.
Key Features:
- REST, GraphQL, and gRPC support
- Environment management
- Automated testing
- Plugin support
Pricing: Free plan available; Paid plan starts at $5/user/month.
Advantages: Insomnia’s simplicity and flexibility make it a favorite among developers. Its support for various protocols and extensive plugin ecosystem enhances its functionality, allowing developers to tailor it to their specific needs.
Website: https://insomnia.rest
5. SoapUI
SoapUI is a comprehensive tool for testing SOAP and REST APIs, offering advanced features for thorough testing. It is designed for developers who need to conduct detailed functional and non-functional testing.
Key Features:
- Functional testing
- Security testing
- Load testing
- Data-driven testing
Pricing: Open-source version available; Paid version starts at $985/year.
Advantages: SoapUI’s extensive feature set makes it suitable for enterprise-level testing needs, providing robust tools for ensuring API quality and security. Its support for both SOAP and REST protocols makes it highly versatile.
Website: https://www.soapui.org
6. Katalon Studio
Katalon Studio is a powerful automation tool supporting API, web, and mobile testing with an intuitive interface. It is designed to offer a complete testing solution without the need for extensive programming knowledge.
Key Features:
- Scriptless automation
- Comprehensive testing solutions
- Integration with CI/CD tools
- Detailed reporting
Pricing: Free plan available; Paid plan starts at $175/user/month.
Advantages: Katalon Studio’s versatility and ease of use make it accessible to both beginners and experienced testers. Its integration capabilities enhance its utility in diverse environments, allowing seamless CI/CD integration.
Website: https://www.katalon.com
7. JMeter
Apache JMeter is an open-source tool designed for performance and load testing of web applications, including API testing. It is a powerful tool for developers needing to test the performance and scalability of their applications.
Key Features:
- Load and performance testing
- Extensive plugin support
- Multiple protocol support
- Test result analysis
Pricing: Free and open-source.
Advantages: JMeter’s robust performance testing capabilities and open-source nature make it a valuable tool for developers needing comprehensive testing solutions without a cost. Its extensive plugin support allows for great customization.
Website: https://jmeter.apache.org
8. Newman
Newman is a command-line collection runner for Postman, enabling automation of Postman collections directly from the terminal. It extends Postman’s capabilities into automated testing environments.
Key Features:
- CLI-based testing
- Integration with CI/CD pipelines
- Detailed reporting
- Environment support
Pricing: Free and open-source.
Advantages: Newman extends Postman’s capabilities to automated testing environments, making it an essential tool for integrating API tests into continuous integration workflows. It’s a must-have for teams already using Postman.
Website: https://github.com/postmanlabs/newman
9. Restlet Client
Restlet Client, formerly known as DHC (Dev HTTP Client), is a simple and efficient tool for API testing and development. It focuses on providing a straightforward interface for efficient API testing.
Key Features:
- Automated testing
- API monitoring
- Environment management
- Team collaboration
Pricing: Free plan available; Pro plan starts at $9/user/month.
Advantages: Restlet Client’s straightforward interface and comprehensive feature set make it a practical choice for developers needing efficient API testing and monitoring solutions. It is particularly useful for teams working on collaborative projects.
Website: https://apitesting.jamesmessinger.com/restlet/
10. TestMace
TestMace provides a powerful API testing solution with a focus on automation and ease of use. It is designed to streamline the testing process and enhance productivity.
Key Features:
- Automated testing
- Test data management
- CI/CD integration
- Custom scripting
Pricing: Free plan available; Pro plan starts at $4/user/month.
Advantages: TestMace’s emphasis on automation and its user-friendly interface make it a valuable tool for developers looking to streamline their API testing processes. Its support for CI/CD integration ensures smooth deployment workflows.
Website: https://testmace.com
11. Assertible
Assertible focuses on automated API testing and monitoring, ensuring continuous reliability of APIs. It is designed to maintain high-quality APIs through robust testing and monitoring.
Key Features:
- Automated testing
- API monitoring
- Environment support
- CI/CD integration
Pricing: Free plan available; Pro plan starts at $25/user/month.
Advantages: Assertible’s strong focus on automation and monitoring makes it ideal for maintaining high-quality APIs in dynamic environments. Its integration capabilities enhance its utility in continuous integration workflows.
Website: https://assertible.com
12. Airborne
Airborne is an open-source API testing framework specifically designed for Ruby developers. It provides a simple syntax for writing API tests within the Ruby ecosystem.
Key Features:
- Simple syntax
- Ruby-based testing
- Integration with RSpec
- Customizable test cases
Pricing: Free and open-source.
Advantages: Airborne’s Ruby-centric design makes it an excellent choice for developers working within the Ruby ecosystem, offering seamless integration with other Ruby-based tools. Its simplicity ensures quick and efficient test creation.
Website: https://github.com/brooklynDev/airborne
13. Swagger Inspector
Swagger Inspector allows developers to easily test and validate their APIs, integrating well with the Swagger ecosystem. It is designed for quick validation and testing of API endpoints.
Key Features:
- Manual and automated testing
- API validation
- Swagger documentation integration
- Environment management
Pricing: Contact for pricing.
Advantages: Swagger Inspector’s seamless integration with the Swagger ecosystem and its focus on API validation make it a practical tool for ensuring API compliance and functionality. It’s particularly useful for developers already using Swagger for documentation.
Website: https://swagger.io/tools/swagger-inspector
14. Citrus
Citrus is a powerful framework for testing messaging interfaces and APIs, supporting various protocols. It is designed for comprehensive testing of API interactions and messaging protocols.
Key Features:
- Multiple protocol support
- Automated testing
- Integration with CI/CD tools
- Detailed reporting
Pricing: Free and open-source.
Advantages: Citrus’s extensive protocol support and automation capabilities make it suitable for comprehensive API and messaging interface testing in diverse environments. Its open-source nature ensures flexibility and cost-effectiveness.
Website: https://citrusframework.org
15. API Fortress
API Fortress is a continuous testing platform for APIs, focusing on automated testing, monitoring, and detailed reporting. It is designed to ensure API quality and performance through continuous testing.
Key Features:
- Continuous testing
- API monitoring
- CI/CD integration
- Detailed analytics
Pricing: Contact for pricing.
Advantages: API Fortress’s emphasis on continuous testing and detailed reporting makes it a powerful tool for maintaining API quality and performance over time. Its integration capabilities ensure smooth CI/CD workflows.
Website: https://saucelabs.com/products/api-testing
16. Pyresttest
Pyresttest is a simple yet powerful API testing tool for Python developers, supporting test automation and performance testing. It is designed for efficient API testing using Python.
Key Features:
- Automated testing
- Performance testing
- YAML-based test definitions
- Detailed reporting
Pricing: Free and open-source.
Advantages: Pyresttest’s simplicity and Python-centric design make it an excellent choice for Python developers looking for efficient and effective API testing solutions. Its YAML-based test definitions ensure readability and ease of use.
Website: https://github.com/svanoort/pyresttest
17. Karate DSL
Karate DSL is an open-source framework combining API testing, performance testing, and mocking into a single tool. It is designed for comprehensive API testing with a simple syntax.
Key Features:
- Simple syntax
- API and performance testing
- Mock server support
- CI/CD integration
Pricing: Free and open-source.
Advantages: Karate DSL’s comprehensive feature set and simple syntax make it accessible to developers looking for an all-in-one testing solution. Its support for mock servers and performance testing ensures thorough API validation.
Website: https://github.com/intuit/karate
18. HttpMaster
HttpMaster is a web development and testing tool focusing on web services and API applications. It is designed for detailed testing and validation of API endpoints.
Key Features:
- Automated testing
- Performance testing
- Detailed reporting
- Customizable test cases
Pricing: Free plan available; Pro plan starts at $99/year.
Advantages: HttpMaster’s focus on web services and API applications, along with its detailed reporting capabilities, make it a valuable tool for thorough API testing. Its customizable test cases ensure flexibility.
Website: https://www.httpmaster.net
19. HTTPie
HTTPie is an incredibly user-friendly command-line tool that aims to make HTTP requests easier and more human-friendly. It supports both macOS and other platforms.
Key Features:
- A simple, clean syntax that reduces the learning curve for making HTTP requests.
- Enhances readability with colorized terminal output.
- Supports various plugins and can be extended to fit your needs.
Pricing: Free plan available; Pro plan starts at $1o/month.
Advantages: HTTPie simplifies making HTTP requests with its user-friendly syntax and clear, color-coded responses. It enhances readability and debugging, supports JSON, and handles authentication, making it an efficient tool for interacting with APIs.
Website: https://httpie.io/
20. Mocha
Mocha is a JavaScript test framework that runs on Node.js and in the browser, used for creating powerful API tests. It is designed for flexible and extendable testing within the JavaScript ecosystem.
Key Features:
- Flexible and extendable
- Simple asynchronous testing
- Integration with other libraries
- Detailed reporting
Pricing: Free and open-source.
Advantages: Mocha’s flexibility and integration capabilities make it a popular choice for JavaScript developers needing comprehensive API testing solutions. Its support for asynchronous testing ensures efficient and effective test creation.
Website: https://mochajs.org
Final Word
API testing is essential for ensuring seamless and secure application functionality. For Mac users, the top 20 tools of 2025 offer a wide range of features to cater to various needs. Whether you're an individual developer or part of a large team, there's a tool for you.
Apidog and Postman provide user-friendly interfaces, while Paw offers advanced scripting for macOS users. JMeter is excellent for performance testing, and SoapUI and Katalon Studio offer comprehensive solutions. Open-source tools like Newman, Airborne, and Karate DSL are customizable and cost-effective. Monitoring tools like API Fortress and API Science ensure API reliability.
Selecting the right tool depends on your specific requirements, team size, and budget. This guide and comparison chart aims to help you choose the best tool for your development workflow. Investing in the right API testing tool will enhance your development process, improve application quality, and deliver a better user experience.
