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

testing api graphql http vuejs spa tools pwa rest vue rest-api websocket http-client api-client developer-tools api-rest testing-tools api-testing

• Updated Nov 5, 2026
• TypeScript

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

javascript git testing graphql-client automation opensource rest-api http-client openapi api-client developer-tools testing-tools api-testing openapi3

• Updated Nov 12, 2026
• JavaScript

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

api graphql curl rest-api websockets grpc http-client api-client electron-app api-design

• Updated Nov 12, 2026
• TypeScript

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

python api debugging cli http client devops json development terminal web rest curl rest-api http-client api-client developer-tools usability api-testing httpie

• Updated Dec 17, 2024
• Python

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

api sdk rest generator rest-api openapi api-client api-server restful-api hacktoberfest rest-client openapi3 openapi-generator

• Updated Nov 11, 2026
• Java

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

api docs vue reference rest-api swagger http-client openapi api-client openapi3

• Updated Nov 12, 2026
• TypeScript

Connect your agents & product to 1,000 APIs.

api oauth integrations oauth2 api-client oauth1 unified-api access-token refresh-token api-integration product-integration api-integrations

• Updated Nov 12, 2026
• TypeScript

A free, open-source developer workspace. Snippets, notes, HTTP requests, calculations, and dev tools in one local-first app.

electron windows macos linux markdown productivity snippets vue notes http-client api-client developer-tools note-taking snippets-manager knowledge-base code-snippets local-first

• Updated Nov 2, 2026
• TypeScript

Community hub for Requestly API Client — bugs, feature requests, and roadmap. The privacy-first Postman alternative.

graphql open-source rest-api websocket grpc api-client developer-tools api-testing git-sync privacy-first postman-alternative

• Updated Nov 12, 2026

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.

api tool api-client wails llm rwkv chatgpt

• Updated Nov 2, 2026
• TypeScript

Official Notion JavaScript Client

javascript api typescript js api-client notion

• Updated Nov 6, 2026
• TypeScript

👨‍🚀 Turn API specifications into production-ready SDKs, validators, mocks, and more. 20+ plugins. Millions of weekly npm downloads. Used by Vercel, OpenCode, PayPal, AWS, Autodesk, and many more.

python typescript sdk swagger openapi api-client developer-tools code-generation codegen sdk-generator

• Updated Nov 8, 2026
• TypeScript

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

api desktop api-client developer-tools api-testing httpie

• Updated Mar 19, 2025

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

api json-schema api-management swagger api-documentation api-client api-gateways

• Updated Dec 20, 2025

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

python nba analysis http-client api-client python3 stats jupyter-notebooks nba-stats nba-api sports-stats nba-stats-api basketball-stats endpoint-analysis

• Updated Nov 11, 2026
• Python

A simple API client (postman like) in your terminal

api rust api-client tui postman insomnia ratatui

• Updated Oct 19, 2026
• Rust

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

go cli terminal curl http-client api-client developer-tools httpie webdevelopment

• Updated Dec 7, 2025
• Go

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

api php http client json framework curl xml proxy restful class http-client http-proxy api-client web-scraper requests web-scraping php-curl web-service php-curl-library

• Updated Nov 10, 2026
• PHP

Cortex - Generates interactive API documentation, typed SDKs, and MCP servers from OpenAPI, AsyncAPI, GraphQL, gRPC, OpenRPC, and Markdown.

graphql markdown docs protobuf mcp swagger grpc api-documentation openapi api-client code-generation sdk-generator documentation-generator asyncapi api-reference openapi-generator openrpc mcp-server mode-context-protocol

• Updated Oct 6, 2026
• TypeScript

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

ruby rails ai api-client openai whisper o1 dall-e gpt-4 chatgpt gpt-4o

• Updated May 1, 2026
• Ruby