API Clients Page 3 of 4

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  1.  1 like

    Native app for macOS, Windows, Linux combining REST and GraphQL client, database manager, SSH/SFTP, docs, boards, encrypted vault, team chat, and offline use.

    Cost / License

    • Freemium
    • Proprietary

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • AT flagAustria
    • European Union flagEU
    Apiboo screenshot 1
    Apiboo screenshot 1
    Apiboo screenshot 2
    +13
    Apiboo screenshot 3
    18 alternatives
  2. Free, privacy-first API client built natively into VS Code. Test REST, GraphQL & WebSocket APIs locally — no login, no cloud sync, no telemetry.

    Cost / License

    • Free
    • Proprietary

    Application type

    Platforms

    • Visual Studio Code
    • US flagUnited States
    Postmate Client request builder in VS Code with dynamic environment variables
    Postmate Client collection runner in VS Code with tag-based data filtering
    Postmate Client API response compare with side-by-side diff highlighting
    +1
    Postmate Client HTML test report with pass/fail results
    8 alternatives
  3. TestMace icon
     7 likes

    Powerful IDE to work with API. Harness the power of scenarios, autocompletion and syntax highlight for API development. Write tests, share code without leaving the comfortable development environment.

    Cost / License

    • Freemium
    • Proprietary

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • US flagUnited States
    TestMace screenshot 1
    TestMace screenshot 1
    TestMace screenshot 2
    +1
    TestMace screenshot 3
    53 alternatives
  4. RequesterX icon
     2 likes

    RequesterX is a free desktop HTTP client for API testing and development. Organize requests into nested collections, use environment variables for easy context switching, generate code snippets in 13 languages, and keep everything stored locally — no account required.

    Cost / License

    • Free
    • Proprietary

    Application type

    Platforms

    • Mac
    • Windows
    • KR flagSouth Korea
    windows screenshot
    52 alternatives
  5. Loadmill icon
     5 likes

    Loadmill helps developers easily create the tests required for continuous delivery by analyzing user behavior. Loadmill automates backend regression testing by replaying real user behavior. Through the use of smart recordings, the platform can create and replay thousands of...

    Cost / License

    • Paid
    • Open Source

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Software as a Service (SaaS)
    • US flagUnited States
    Code, record, debug and run tests with a complete development environment in your browser
    Record complex user flows and replay them as API tests— Loadmill will automatically extract tokens, credentials, and entity Ids into parameters. Our advanced algorithmic approach enables the unique ability to "understand" and automatically convert backend/API recordings to code that mirrors the full cycle of a real customer journey.
    Loadmill will scan your application and analyze user flows to create API tests for you automatically. Our algorithm will automatically map the relationship between back-end services and user behavior, exposing previously unknown user flows and service dependencies.
    13 alternatives
  6. BridgeLab icon
     1 like

    BridgeLab is an open-source desktop workbench to edit, validate and test HL7 v2 and FHIR messages — MLLP, HTTP, PHI masking, FHIRPath — offline.

    Cost / License

    • Freemium
    • Open Source (MIT)

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • IT flagItaly
    • European Union flagEU
    HL7 v2 message open with validation errors highlighted (an ADT^A01 with a deliberate error)
    FHIR bundle
    FHIR bundle visualizer with a Bundle
    +5
    MLLP listener history
    5 alternatives
  7. Resonance is a local-first, zero-account API client application designed to provide an excellent user experience for testing and interacting with APIs. Built with Tauri, it offers a modern and intuitive interface for developers.

    Cost / License

    • Free
    • Open Source (MIT)

    Application type

    Platforms

    • Linux
    • Flathub
    • Flatpak
    • Mac
    • Windows
    • Snapcraft
    Resonance API Client screenshot 1
    52 alternatives
  8. GetIt icon
     Like

    Send HTTP requests to API endpoints. GetIt's main focus is to make your life a lot easier when you have to test APIs or use somebody else's API.

    Cost / License

    • Free
    • Open Source (MIT)

    Application type

    Platforms

    • Linux
    • Flathub
    • Flatpak
    Overview
    GetIt screenshot 1
    GetIt screenshot 2
    +1
    GetIt screenshot 3
    60 alternatives
  9. Main goal of this VSCode extension is storing all HTTP request & response data automatically as files in a VSCode workspace.

    Cost / License

    • Free
    • Open Source (MIT)

    Application type

    Alerts

    • Discontinued

    Platforms

    • Mac
    • Windows
    • Linux
    POST request with its http header results
    12 alternatives
  10. Api Quest icon
     1 like

    Api Quest is a desktop application designed for executing HTTP requests, storing them on the local file system, and providing portability. Whether you're a developer, QA or system engineer, this tool offers solution for handling HTTP requests effectively.

    Cost / License

    • Free
    • Proprietary

    Application type

    Platforms

    • Windows
    • Linux
    Api Quest UI
    14 alternatives
  11. A secure, local-first browser extension that packs essential developer utilities, JSON formatters, and JWT decoders directly into your toolbar.

    Cost / License

    • Free
    • Proprietary

    Platforms

    • Online
    • Google Chrome
    • IN flagIndia
    ZeroWebTools screenshot 1
    5 alternatives
  12. ProtoPeek icon
     Like

    ProtoPeek is a local-first, open-source workbench for inspecting gRPC and HTTP services. It runs a local Go process with a browser-based console and command-line entry points.

    Cost / License

    • Free
    • Open Source (MIT)

    Application type

    Platforms

    • Windows
    • Linux
    • Mac
    ProtoPeek v0.5.0 Downloader with local fixture transfers and checksum verification.
    1 alternatives
  13. Conektto icon
     1 like

    Conektto's API lifecycle fabric is the world's first SAAS based visual designer for API that generates spec, mocks, visualization, code, test and test data automatically.

    Cost / License

    • Freemium
    • Proprietary

    Application type

    Platforms

    • Software as a Service (SaaS)
    • US flagUnited States
    Conektto screenshot 1
    Conektto screenshot 1
    Conektto screenshot 2
    +5
    Conektto screenshot 3
    24 alternatives
  14. Lightweight, free and open-source offline REST and GraphQL API client for Visual Studio Code. A privacy-focused client for testing APIs, HTTP requests and web services.

    Cost / License

    • Free
    • Open Source (MIT)

    Application type

    Platforms

    • Cursor
    • Windsurf
    • Visual Studio Code
    • IN flagIndia
    Telegraph REST API Client screenshot 1
    Telegraph REST API Client screenshot 1
    Telegraph REST API Client screenshot 2
    +12
    Telegraph REST API Client screenshot 3
    52 alternatives
  15. ApiClient icon
     Like

    Helps you to test the Rest API with your phone including features like import, edit and export postman collections.With this, you don't need to look for your laptop or PC whenever you need to test and modify your REST APIs. You can work on them anytime, on the go.

    Cost / License

    • Freemium
    • Proprietary

    Application type

    Platforms

    • Android
    ApiClient screenshot 1
    ApiClient screenshot 2
    ApiClient screenshot 3
    48 alternatives
  16. APIBuilderHQ is a zero-friction alternative to heavy API clients like Postman. Built entirely for the browser — no desktop app, no mandatory accounts, no cloud sync. Your collections and request data stay in localStorage on your device.

    Cost / License

    • Freemium
    • Proprietary

    Application type

    Platforms

    • Online
    • US flagUnited States
    AI generates a complete API request from plain English in under 3 seconds
    Send the request and see the full response with status code — no login required
    6 alternatives
  17. Humlix icon
     1 like

    Humlix shows you an easy way of generating tests for your web APIs. All you need to do is create a test request using the test request builder within Humlix and give an example of how your endpoints look and what type of data they want.

    Cost / License

    • Free
    • Proprietary

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    Humlix screenshot 1
    33 alternatives
  18. GetAPI icon
     Like

    GetAPI is a native macOS app that simplifies REST API testing by allowing users to import from Postman, make HTTP requests, and view responses in a streamlined interface.

    Cost / License

    • Paid
    • Proprietary

    Application type

    Platforms

    • Mac
    • US flagUnited States
    GetAPI screenshot 1
    GetAPI screenshot 1
    GetAPI screenshot 2
    +2
    GetAPI screenshot 3
    28 alternatives