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Top 10 Online Postman-Like Tools for API Testing and Development

n 2024, API testing tools like Apidog and SoapUI are enhancing development workflows. Apidog streamlines the API lifecycle with collaborative design, testing, and documentation. Explore these top tools to boost your API testing efficiency and improve application reliability.

Emmanuel Mumba

Emmanuel Mumba

Updated on November 29, 2024

API development is a central part of modern software architecture, with tools like Postman leading the charge in simplifying API testing and collaboration. However, as the field matures, developers seek alternative tools that meet diverse needs, including cloud-based platforms, team collaboration, and multi-protocol support. In this guide, we’ll explore 10 Postman alternatives for 2024, each catering to specific workflows and providing distinct features to optimize the API development and testing process.

Whether you’re developing RESTful services, working with GraphQL, or need comprehensive WebSocket support, these tools offer unique ways to test, debug, and document your APIs in real-time. With enhanced performance and user-friendly interfaces, they serve developers working individually or within teams on complex projects. We’ll review the strengths, standout features, and sample code requests for each, helping you choose the right fit for your needs.

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1. Apidog: The All-in-One API Workflow Automation Tool

Apidog is a robust, browser-based API development platform tailored for streamlined workflows, from design to deployment. With Apidog, teams can seamlessly manage API design, testing, debugging, and documentation—all in one collaborative environment. Its advanced features, especially in multi-environment management and test automation, make it a top choice for API management.

Apidog: The All-in-One API Workflow Automation Tool
The All-in-One API Workflow Automation Tool

Key Features:

Environment Management: Apidog provides a powerful Environment Setup feature to allow users to easily manage and switch between testing environments like development, staging, and production.

  • Base URL Management: Automatically appends base URLs to API paths, simplifying the request structure.
  • Quick Environment Switching: Effortlessly switch environments through the dropdown in the upper right corner, ideal for multi-stage testing without manual reconfiguration.
  • Additional Parameters: Set additional parameters for all APIs in a given environment, referencing environment or global variables for efficient customization.

Test Scenario Creation: Apidog's test scenario feature allows users to create automated tests directly within the platform, making it easy to manage API testing.

  • Creating a New Test Scenario: To create a test scenario, open Apidog, select Test from the left menu, and click the + icon next to the search bar. Here, you can name the scenario, assign it to the relevant directory, and set its priority level.
  • Priority Settings: Scenarios can be prioritized to ensure critical tests are highlighted and run first, enabling teams to maintain a structured testing approach for robust QA practices.

Automated Documentation and Code Generation: Apidog automatically generates interactive API documentation to keep API specs up-to-date and easily shareable with stakeholders. The platform also includes code generation in multiple languages, saving development time by allowing quick integration of tested endpoints.

Define API Endpoints

Once inside your project, define the API endpoints you'll be working with. Apidog provides an intuitive interface for adding GET, POST, PUT, DELETE, and other types of API requests. Simply click "New Endpoint" and start filling in the details such as:

  • Method (GET, POST, etc.)
  • Endpoint URL
  • Headers (e.g., authorization tokens)
  • Body (for POST/PUT requests)

Apidog excels with its cohesive approach to environment management, automated test scenarios, and interactive documentation, making it highly effective for real-time API workflows. Its support for multiple environments allows developers to switch seamlessly across various stages of development, from testing to production. This flexibility and efficiency make Apidog an excellent alternative to traditional tools like Postman, especially for teams needing a dynamic and streamlined API management experience.

2. Hoppscotch: The Lightweight, Speed-Focused API Tester

Hoppscotch is an open-source, fast, and efficient API development tool that runs directly in your browser. It is ideal for developers who want quick, distraction-free API testing without extensive setup, supporting REST, GraphQL, and WebSocket protocols.

The Lightweight, Speed-Focused API Tester

Key Features

  • Supports REST, GraphQL, and WebSocket: Provides versatile protocol support for various API types.
  • Lightweight and Fast: Designed to be responsive, making it great for rapid testing cycles.
  • Customizable Collections: Users can organize API requests into collections and save them for future use.

Example API Request

// Hoppscotch example for POST request
fetch('https://api.example.com/resource', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({ name: 'New Resource' })
})
.then(response => response.json())
.then(data => console.log(data))
.catch(error => console.error('Error:', error));

Why Choose Hoppscotch?
Hoppscotch’s speed-focused design is perfect for developers working on small to medium projects who need to quickly test APIs across various protocols.

3. Paw : The Cross-Platform API Powerhouse

Initially exclusive to macOS, Paw now offers a web version that brings its powerful testing capabilities and user-friendly design to cross-platform teams. Known for its detailed request history and cloud sync features, Paw is a favorite for multi-device work environments.

The Cross-Platform API Powerhouse

Key Features

  • Supports REST and GraphQL: Allows you to build complex queries and test different API endpoints.
  • Secure Cloud Sync: Syncs API projects across devices securely.
  • Detailed Request History: Enables easy tracking and re-use of past requests.

Example API Request

# Paw example for Python using requests library
import requests

response = requests.get("https://api.example.com/resource", headers={"Authorization": "Bearer <token>"})
print(response.json())

Why Choose Paw?
Paw’s secure, intuitive interface and cross-platform accessibility make it a go-to option for teams requiring detailed request histories and multiple authentication methods.

4. Swagger Inspector: The Documentation-Ready API Tester

Swagger Inspector is a browser-based tool from the Swagger ecosystem, specializing in API testing and documentation. It’s perfect for developers who need to create OpenAPI-compliant specifications and auto-generate API documentation as they test endpoints.

The Documentation-Ready API Tester

Key Features

  • Supports RESTful API Testing: Test endpoints and verify API behavior without leaving your browser.
  • Auto-Generated OpenAPI Documentation: Converts API tests into structured, documented specifications.
  • Easy Sharing and Collaboration: Share API test results and documentation easily with teammates.

Example API Request

// Swagger Inspector example for GET request with query parameters
fetch('https://api.example.com/data?limit=10&sort=desc', {
  method: 'GET',
  headers: {
    'Accept': 'application/json'
  }
})
.then(response => response.json())
.then(data => console.log(data))
.catch(error => console.error('Error:', error));

Swagger Inspector is an outstanding tool for developers handling REST APIs, particularly for those who want to streamline the creation of OpenAPI documentation straight from their testing process. Its ability to generate documentation automatically enhances productivity, making it an ideal choice for developers focused on both testing and documentation in one workflow.

5. Insomnia Designer: The GraphQL-Friendly Team Collaboration Tool

Insomnia Designer offers powerful collaborative features for API development, supporting REST, GraphQL, and even gRPC requests. It’s known for its intuitive design and powerful testing tools that make it easy for teams to build and test APIs in real-time.

Key Features

  • Team Collaboration: Real-time collaboration support for multiple team members.
  • Automate API testing: Fully automate the API lifecycle. Build tests and linting to improve reliability with Kong Insomnia's native CLI and CI/CD integrations.
  • Multi-Environment Support: Easily switch between development, staging, and production environments.
  • GraphQL Focused: Built-in support for GraphQL APIs with query and mutation testing capabilities.

Example GraphQL Query

// Insomnia Designer example for a GraphQL query
fetch('https://api.example.com/graphql', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    query: `
      query {
        user(id: "1") {
          name
          email
        }
      }
    `
  })
})
.then(response => response.json())
.then(data => console.log(data))
.catch(error => console.error('Error:', error));

Why Choose Insomnia Designer?
Insomnia Designer is built for teams that need powerful, flexible API testing and documentation, especially for GraphQL-based applications.

6. Restlet Client (formerly DHC): Monitoring and Debugging Specialist

Restlet Client, previously known as DHC, is a flexible, browser-based tool that enables developers to design, test, and share APIs seamlessly within a single environment. This tool is widely adopted for its cloud-based approach, making it ideal for developers who require accessible and efficient API testing solutions. Restlet Client streamlines the entire API lifecycle—from design and testing to collaboration—offering a comprehensive solution for teams working in distributed or remote setups.

Monitoring and Debugging Specialist

Key Features

  • Extensive Testing Options: Supports HTTP requests and custom headers.
  • Monitoring and Alerts: Built-in monitoring capabilities for live APIs.
  • Debugger Tool: Troubleshoot API errors and log detailed request responses.

Example API Request

// Restlet Client example for DELETE request
fetch('https://api.example.com/resource/1', {
  method: 'DELETE',
  headers: {
    'Authorization': 'Bearer <token>'
  }
})
.then(response => console.log('Deleted:', response.ok))
.catch(error => console.error('Error:', error));

Restlet Client Advantages

Restlet Client is particularly suited for teams overseeing live API deployments, thanks to its advanced monitoring, debugging, and logging capabilities. These features enable precise oversight and continuous assessment of API performance, which is essential for maintaining reliability in production environments. By centralizing these tools, Restlet Client supports streamlined troubleshooting and enhances operational efficiency for teams working with intricate API architectures, making it a solid choice for developers and organizations seeking a comprehensive API management platform.

7. RapidAPI Studio: Comprehensive API Marketplace and Testing Platform

RapidAPI Studio is a full-fledged platform for API development and testing with a unique API marketplace, making it ideal for developers looking to build, test, and integrate APIs.

Comprehensive API Marketplace and Testing Platform

Key Features of RapidAPI Studio

Marketplace Integration: Effortlessly browse and integrate a vast range of public APIs directly within the platform. RapidAPI Studio centralizes API discovery, making it easy to find and connect the right services for your project.

Comprehensive Testing and Monitoring: Streamline your workflow by creating, testing, and monitoring API calls from a single platform. RapidAPI Studio provides built-in tools to ensure every API call performs optimally, improving reliability and functionality throughout development.

Auto-Generated Code Snippets: Save time with instant code snippets for multiple programming languages, enabling seamless integration of APIs into your application’s codebase. This feature allows developers to easily add API calls to their projects without manually writing integration code.

Ideal for Developers
RapidAPI Studio is designed to meet the needs of developers who regularly work with third-party APIs. Its robust set of tools and features allow for effective API management, from discovery and integration to testing and monitoring, all within a unified interface.

8. SoapUI Online: Enterprise-Grade API Tester for SOAP and REST

SoapUI is a powerful tool designed for SOAP and REST API testing, now available both as a desktop application and an online version. With its comprehensive suite of features, SoapUI is particularly valuable for enterprise teams overseeing complex API projects.

Key Features:

  • SOAP and REST Support: Allows testing of SOAP-based services alongside RESTful APIs, making it highly versatile.
  • Data-Driven Testing: Enables automated testing with various data sets for in-depth testing scenarios.
  • CI/CD Integration: Integrates with continuous integration and deployment pipelines to facilitate seamless, continuous testing processes.
  • Security Testing: Includes features for security testing, helping teams identify vulnerabilities and ensure that APIs are secure against attacks.

These capabilities make SoapUI ideal for teams requiring a reliable, scalable tool to manage large-scale API testing and automation.

SoapUI’s extensive features cater to the demands of enterprise environments, providing robust tools for maintaining API quality, reliability, and performance across large, complex applications.

9. Restfox: The Simplified Tool for Quick API Tests

Restfox is a straightforward API testing tool that focuses on essential functionality, offering a distraction-free environment for sending requests and viewing responses. Designed with simplicity in mind, it’s ideal for developers who need quick, efficient testing without a complex setup.

Key Features

  • Real-Time Logging: Instantly view request and response details, making it easy to troubleshoot and verify results.
  • Quick Setup and Use: Minimal setup makes it perfect for rapid tests and quick checks.
  • Collection Management: Organize requests into collections for easy access and reusability.

With its simplicity and user-friendly design, Restfox is a go-to for developers seeking an efficient tool for quick, straightforward API testing, free from unnecessary features and complexity.

10. Testfully: The Minimalistic, No-Fuss API Testing Tool

Testfully is designed for teams needing continuous, automated monitoring and testing to maintain API uptime and reliability. With robust multi-protocol support, it seamlessly handles REST, SOAP, and GraphQL APIs, making it adaptable to diverse workflows.

The Minimalistic, No-Fuss API Testing Tool

Key Features

  • Automated Testing: Schedule recurring tests to ensure consistent API performance, with real-time alerts for any detected issues.
  • Detailed Reporting: Offers comprehensive insights into API performance and potential issues, helping teams address bottlenecks quickly.
  • Multi-Protocol Support: Accommodates REST, SOAP, and GraphQL APIs, allowing flexibility across different projects and environments.

Testfully's emphasis on scheduled, automated testing makes it particularly valuable for teams responsible for managing production-level APIs, where reliability and prompt issue detection are essential.

Conclusion

In 2024, API testing has evolved to offer a versatile array of tools, from lightweight options like Hoppscotch and Restfox to enterprise solutions like Apidog and SoapUI. Each tool provides unique features, so whether you're an individual developer or part of a large team, there's a solution designed to fit your workflow. Choosing the right tool, especially one like Apidog with its all-in-one API management capabilities, can significantly boost productivity and enhance the reliability of your applications. By understanding each platform’s strengths, you can select the best fit for your needs and drive your API development process forward with confidence.

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