Api Client Open Source Projects

Open-Source API Development Ecosystem • https://hoppscotch.io • Offline, On-Prem & Cloud • Web, Desktop & CLI • Open-Source Alternative to Postman, Insomnia

Opensource IDE For Exploring and Testing API's (lightweight 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.

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

Build product integrations with AI.

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.

Prometheus instrumentation library for Go applications

Official Notion JavaScript Client

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

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

Add an AngularJS admin GUI to any RESTful API

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

Input OpenAPI. Output SDKs and Docs.

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

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

Collaborative forensic timeline analysis

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

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

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.

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.

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

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

Use Hugging Face with JavaScript

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

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

Mock, Test & Track HTTP Requests and Response for Microservices

Messaging APIs for multi-platform

A very simple Salesforce.com REST API client for Python

Automated API Testing and Quality Assurance

NodeJS/Browser MTProto API Telegram client library,

DigitalOcean Go API client

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

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

🦋 Full-native go implementation of Telegram API

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

微信支付 APIv3 的官方 Go Library

A REST client inside your Laravel app

Tool to browse data exposed by Ubiquiti's UniFi Controller API

Ruby interface to GitHub API

A Declarative HTTP Client for Python

A Go client library for the Twitter 1.1 API

List of awesome API clients. Postman and Insomnia alternatives

Transform your postman collection to HTML/Markdown documentation

Simplified Kubernetes API client for Node.js.

Python wrapper for the Mastodon ( https://github.com/mastodon/mastodon/ ) API.

Twitter API for Laravel 5.5+, 6.x, 7.x & 8.x

GitLab API v4 client for PHP

A user-friendly Node.js / JavaScript client library for interacting with the Twitter API.

Node.js & JavaScript SDK for Binance REST APIs & WebSockets, with TypeScript & browser support, integration tests, beautification & more.

:tada:✨ Slack API client for Node and browsers.

Facepy makes it really easy to use Facebook's Graph API with Python

A Python wrapper around the OpenWeatherMap web API

Python samples, language bindings, and API reference documentation for vSphere, VMC, and NSX-T using the VMware REST API

RestFB is a simple and flexible Facebook Graph API client written in Java.

A Python library that interfaces with the MediaWiki API. This is a mirror from gerrit.wikimedia.org. Do not submit any patches here. See https://www.mediawiki.org/wiki/Developer_account for contributing.

Interact with Twitch's API, chat and subscribe to events via PubSub and EventSub.

DigitalOcean API v2 client for PHP

REST Exchange API for Kraken.com, Python 3