Software Alternatives, Accelerators & Startups

Top 5 API Clients in Testing

The best API Clients within the Testing category - based on our collection of reviews & verified products.

Postman Requestly Bruno Mockphine

Summary

The top products on this list are Postman, Requestly, and Bruno. All products here are categorized as: API Clients. Software and platforms for testing various aspects of software and systems. One of the criteria for ordering this list is the number of mentions that products have on reliable external sources. You can suggest additional sources through the form here.
  1. The Collaboration Platform for API Development
    Pricing:
    • Open Source
    • User-Friendly Interface - Postman features an intuitive and user-friendly interface that simplifies the process of constructing API requests and visualizing responses. This makes it accessible for both beginners and advanced users.
    • Collaboration - Postman offers robust collaboration features, such as shared workspaces, collections, and real-time editing, enabling teams to work together more efficiently on API development.
    • Comprehensive Testing Tools - Postman provides a suite of testing tools to create, automate, and manage test cases. It supports automated testing through its scripting environments, which ensure APIs perform as expected.
    • Extensive API Documentation - Postman can automatically generate comprehensive API documentation, making it easier to maintain and share API specifications with stakeholders and other developers.
    • Mock Servers - Postman allows users to create mock servers to simulate API responses. This is particularly useful for testing and development purposes when the actual API is not yet available.

    #API Tools #Developer Tools #APIs 30 social mentions

  2. Create production-ready applications with zero code
    Pricing:
    • Freemium
    • Free Trial
    • $9 / Monthly
    • Full-Stack JavaScript Framework - Modelence provides an integrated full-stack JavaScript framework that combines frontend and backend development into a unified platform, reducing the need to stitch together multiple libraries and tools.
    • Built-in Backend Services - The platform comes with built-in services like database, authentication, file storage, and scheduled tasks out of the box, allowing developers to focus on building features rather than setting up infrastructure.
    • Simplified Deployment - Modelence offers streamlined deployment capabilities, making it easy to go from development to production without complex DevOps configurations or managing separate hosting for frontend and backend.
    • Rapid Prototyping and Development - By providing pre-built components and services in a cohesive framework, Modelence enables developers to build and ship applications significantly faster compared to assembling a custom tech stack.
    • React-Based Frontend - The framework leverages React for the frontend, meaning developers can use a familiar and widely-adopted UI library while benefiting from the integrated backend services Modelence provides.

    #Developer Tools #Application Builder #AI Application Builder Featured

  3. A Powerful API Mocking and Testing Tool
    Pricing:
    • Open Source
    • Freemium
    • Free Trial
    • Redirect URL
    • Block Network Requests
    • Modify Request & Response Header
    • Modify Response
    • Supercharge Selenium

    #Open Source #Testing #Developer Tools 35 social mentions

  4. 3
    Bruno is a Git-integrated, fully offline, and open-source API client
    Pricing:
    • Open Source
    • User-Friendly Interface - Bruno offers a clean and intuitive interface, making it easy for users to navigate and utilize the platform's features effectively.
    • Comprehensive Feature Set - The platform provides a wide array of features that cater to different needs, ensuring that users have the tools necessary to achieve their objectives.
    • Regular Updates - Bruno is consistently updated with new features and improvements, keeping the platform relevant and responsive to user feedback.
    • Strong Customer Support - Users have access to reliable and friendly customer support, helping to resolve any issues or questions promptly.

    #API Tools #APIs #Developer APIs 1 social mentions

  5. Mock blocked APIs, passthrough ready routes, see live source
    • Quick Mock API Creation - Mockphine allows developers to rapidly create mock APIs without needing a backend, enabling frontend teams to start development immediately without waiting for backend services to be ready.
    • No Coding Required - The platform provides a user-friendly interface that lets users set up mock endpoints without writing complex code, making it accessible to developers of all skill levels and even non-technical team members.
    • Collaboration Friendly - Mockphine supports team collaboration by allowing multiple team members to share and work on mock APIs together, streamlining the development workflow across frontend and backend teams.
    • Customizable Responses - Users can define custom response bodies, status codes, and headers for their mock endpoints, giving them fine-grained control over the simulated API behavior for various testing scenarios.
    • Speeds Up Development Workflow - By decoupling frontend and backend development, Mockphine helps teams work in parallel, significantly reducing development time and eliminating bottlenecks caused by API dependencies.

    #API Tools #Developer Tools #APIs

  6. Free browser extension to modify HTTP request and response headers. No sign-up. Works on Chrome, Firefox, and Edge.
    • Easy HTTP Header Modification - ModHeader allows users to easily add, modify, or remove HTTP request and response headers directly from the browser without needing to write code or set up a proxy server.
    • User-Friendly Interface - The extension provides a simple, intuitive UI where users can create profiles, toggle headers on/off, and manage multiple header configurations with minimal technical knowledge.
    • Profile Management - Users can save multiple header profiles for different testing scenarios (e.g., different environments, authentication tokens, or user agents) and switch between them quickly.
    • Cross-Browser Support - ModHeader is available for major browsers including Chrome, Firefox, and Edge, making it versatile for developers who work across different browser environments.
    • Useful for Development and Testing - It's particularly helpful for developers and QA testers who need to simulate different API keys, test CORS configurations, spoof user agents, or debug header-related issues without modifying server code.

    #Security #Debugging #Developer Tools

  7. Shared cloud environments for AI coding agents. Run Claude Code, Cursor CLI, Codex, and Gemini CLI from any device, API, or automation tool.
    Pricing:
    • Open Source
    • Paid
    • Free Trial
    • €7 / Monthly
    • Git Integration - Manage branches, view commit history, and browse files with syntax highlighting directly from the browser or mobile app.
    • Cross-Device Sync - Start planning a feature on your phone, pick up the same session in VS Code at your desk, or kick off from a Linear ticket and continue in your IDE.
    • Plugin Ecosystem - Extend your workflow with plugins and MCP integrations. Customize how your agents work to fit your team's process.
    • Multi-Agent Support - Run Claude Code, Cursor CLI, OpenAI Codex, and Gemini CLI side by side. Bring your own API keys. No vendor lock-in.
    • Persistent Cloud Sessions - agents keep running 24/7. Close your laptop, switch devices, or walk away entirely and your session survives with full context intact

    #Cloud Computing #AI #Code Editor Featured

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