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Open Source API Clients using npm

A curated collection of the best open source client applications for interacting with and testing APIs. using npm.

Lightweight, fast, and open-source API client for developers
  • Stars

    47,766
  • Last commit

    2 days ago
  • License

    MIT
A modern, user-friendly API client that simplifies API testing and development with a clean interface and powerful features.

Open Source Alternative to:

Powerful API development and testing made effortless
  • Stars

    40,069
  • Last commit

    6 hours ago
  • License

    Apache-2.0
Intuitive API client for REST, GraphQL, and gRPC. Debug, test, and collaborate on APIs with ease across platforms.

Open Source Alternative to:

Fast, secure, offline API client with Git integration
  • Stars

    19,338
  • Last commit

    2 days ago
  • License

    MIT
A modern API client offering local-only data storage, Git integration, plugin extensibility, and multi-protocol support for developers.

Open Source Alternative to:

Intercept, modify, and debug HTTP(S) requests effortlessly
  • Stars

    6,753
  • Last commit

    2 days ago
  • License

    AGPL-3.0
A powerful browser extension and desktop app for developers to manipulate network requests, debug APIs, and improve web app testing

Open Source Alternative to: