Browse free open source API Clients and projects for Windows below. Use the toggles on the left to filter open source API Clients by OS, license, language, programming language, and project status.
Development toolkit for Web Services and XML data bindings for C & C++
HTML, JavaScript, and CSS assets that generate Swagger documentation
The open-source, cross-platform API client for GraphQL
Opensource IDE For Exploring and Testing Api's
Thunder Client is a lightweight Rest API Client Extension for VS Code
OpenAPI based HTTP Client code generator
Simple REST and HTTP API Client for .NET
A PHP client library for accessing Google APIs
Open source API development ecosystem
A light-weight REST API development framework for ASP.Net 6
OpenAI Api Client in Java
PHP SDK for integrating with WeChat’s APIs
OpenSource Postman Alternative. The developer-first API devtool
Human-friendly and powerful HTTP request library for Node.js
NetSuite PHP API Client with namespaces and autoloading
OpenAI PHP is a supercharged community-maintained PHP API client
OpenAPI Generator allows generation of API client libraries
Examples, server integrations for generating Swagger API Specification
Java Docker API Client
Simple and Easy-to-Use REST API client for server developers.
High-level API design language for web APIs
API Dash is a beautiful AI-powered open-source cross-platform
The power of curl, the ease of use of httpie