api-client

Kong/insomnia

The open-source, cross-platform API client for GraphQL, REST, WebSockets, SSE and gRPC. With Cloud, Local and Git storage.

usebruno/bruno

Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)

httpie/cli

🥧 HTTPie CLI — modern, user-friendly command-line HTTP client for the API era. JSON support, colors, sessions, downloads, plugins & more.

OpenAPITools/openapi-generator

OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec (v2, v3)

scalar/scalar

Scalar is an open-source API platform:　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　🌐 Modern Rest API Client　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　📖 Beautiful API References　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　✨ 1st-Class OpenAPI/Swagger Support

josStorer/RWKV-Runner

A RWKV management and startup tool, full automation, only 8MB. And provides an interface compatible with the OpenAI API. RWKV is a large language model that is fully open source and available for commercial use.

NangoHQ/nango

A single API for all your integrations.

makenotion/notion-sdk-js

Official Notion JavaScript Client

requestly/requestly

Free and open-source API Client & Interceptor.

yosriady/awesome-api-devtools

:books: A collection of useful resources for building RESTful HTTP+JSON APIs.

httpie/desktop

🚀 HTTPie Desktop — cross-platform API testing client for humans. Painlessly test REST, GraphQL, and HTTP APIs.

ArchGPT/insomnium

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

rs/curlie

The power of curl, the ease of use of httpie.

php-curl-class/php-curl-class

PHP Curl Class makes it easy to send HTTP requests and integrate with web APIs

alexrudall/ruby-openai

OpenAI API + Ruby! 🤖❤️ GPT-5 & Realtime WebRTC compatible!

swar/nba_api

An API Client package to access the APIs for NBA.com

Julien-cpsn/ATAC

A simple API client (postman like) in your terminal

firecamp-dev/firecamp

Developer-first OpenSource API DevTool, Postman/Insomnia alternative.

flawiddsouza/Restfox

Offline-First Minimalistic HTTP & Socket Testing Client for the Web & Desktop

Ovi/DummyJSON

DummyJSON.com provides different types of REST Endpoints filled with JSON data which you can use in developing the frontend with your favorite framework and library without worrying about writing a backend.

pksunkara/alpaca

Given a web API, Generate client libraries in node, php, python, ruby

foss42/apidash

API Dash is a beautiful AI-powered open-source cross-platform (Desktop & Mobile) API Client built using Flutter which can help you easily create & customize your HTTP & GraphQL API requests, visually inspect responses and generate API integration code. A lightweight alternative to postman/insomnia.

huggingface/huggingface.js

Use Hugging Face with JavaScript

ramnes/notion-sdk-py

Notion API client SDK, rewritten in Python! (sync + async)

Kong/insomnia-mockbin

Insomnia Mockbin is the underlying backend for the API mocks capability of Insomnia. It is built and used by Kong, the author of the open-source Kong Gateway.

bottenderjs/messaging-apis

Messaging APIs for multi-platform

simple-salesforce/simple-salesforce

A very simple Salesforce.com REST API client for Python

stepci/stepci

Automated API Testing and Quality Assurance

gram-js/gramjs

NodeJS/Browser MTProto API Telegram client library,

quandl/quandl-python

algolia/algoliasearch-client-javascript

⚡️ A fully-featured and blazing-fast JavaScript API client to interact with Algolia.

xelaj/mtproto

🦋 Full-native go implementation of Telegram API

davidhsianturi/laravel-compass

A REST client inside your Laravel app

Art-of-WiFi/UniFi-API-client

A PHP API client class to interact with Ubiquiti's UniFi Controller API

brainboxdotcc/DPP

C++ Discord API Bot Library - D++ is Lightweight and scalable for small and huge bots!