Open source API development ecosystem - https://hoppscotch.io (open-source alternative to Postman, Insomnia)
The open-source, cross-platform API client for GraphQL, REST, WebSockets, SSE and gRPC. With Cloud, Local and Git storage.
🥧 HTTPie CLI — modern, user-friendly command-line HTTP client for the API era. JSON support, colors, sessions, downloads, plugins & more.
Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)
OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec (v2, v3)
Scalar is an open-source API platform: 🌐 Modern Rest API Client 📖 Beautiful API References ✨ 1st-Class OpenAPI/Swagger Support
A single API for all your integrations.
Official Notion JavaScript Client
📚 A collection of useful resources for building RESTful HTTP+JSON APIs.
Local-first Developer Tool to Build, Test, Intercept & Mock API Requests. Requestly is a combination of REST API Client and HTTP Interceptor. It is simple, beautiful and powerful alternative to Postman, Insomnia, Bruno and Charles Proxy.
🚀 HTTPie Desktop — cross-platform API testing client for humans. Painlessly test REST, GraphQL, and HTTP APIs.
Insomnium is a fast local API testing tool that is privacy-focused and 100% local. For testing GraphQL, REST, WebSockets and gRPC. This is a fork of Kong/insomnia
The power of curl, the ease of use of httpie.
PHP Curl Class makes it easy to send HTTP requests and integrate with web APIs
An API Client package to access the APIs for NBA.com
Given a web API, Generate client libraries in node, php, python, ruby
Developer-first OpenSource API DevTool, Postman/Insomnia alternative.