Api Open Source Projects

A collective list of free APIs

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

🚀 Strapi is the leading open-source headless CMS. It’s 100% JavaScript/TypeScript, fully customizable, and developer-first.

LocalAI is the open-source AI engine. Run any model - LLMs, vision, voice, image, video - on any hardware. No GPU required.

A cryptocurrency trading API with more than 100 crypto and prediction exchanges in JavaScript / TypeScript / Python / C# / PHP / Go / Java

Enhanced ChatGPT Clone: Features Agents, MCP, Skills, DeepSeek, Anthropic, AWS, OpenAI, Responses API, Azure, Groq, o1, GPT-5, Mistral, OpenRouter, Vertex AI, Gemini, Artifacts, AI model switching, message search, Code Interpreter, langchain, DALL-E-3, OpenAPI Actions, Functions, Secure Multi-User Auth, Presets, open-source for self-hosting. Active

🧙‍♀️ Move Fast and Break Nothing. End-to-end typesafe APIs made easy.

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.

The flexible backend for all your projects 🐰 Turn your DB into a headless CMS, admin panels, or apps with a custom UI, instant APIs, auth & more.

Beautiful static documentation for your API

LLM API 管理 & 分发系统，支持 OpenAI、Azure、Anthropic Claude、Google Gemini、DeepSeek、字节豆包、ChatGLM、文心一言、讯飞星火、通义千问、360 智脑、腾讯混元等主流模型，统一 API 适配，可用于 key 管理与二次分发。单可执行文件，提供 Docker 镜像，一键部署，开箱即用。LLM API management & key redistribution system, unifying multiple providers under a single API. Single binary, Docker-ready, with an English UI.

Blazing fast, instant realtime GraphQL APIs on all your data with fine grained access control, also trigger webhooks on database events.

The official Python library for the OpenAI API

Python资源大全中文版，包括：Web框架、网络爬虫、模板引擎、数据库、数据可视化、图片处理等，由「开源前哨」和「Python开发者」微信公号团队维护更新。

网易云音乐 Node.js API service

Web APIs for Django. 🎸

REST API for any Postgres database

短信转发器——监控Android手机短信、来电、APP通知，并根据指定规则转发到其他手机：钉钉群自定义机器人、钉钉企业内机器人、企业微信群机器人、飞书机器人、企业微信应用消息、邮箱、bark、webhook、Telegram机器人、Server酱、PushPlus、手机短信等。包括主动控制服务端与客户端，让你轻松远程发短信、查短信、查通话、查话簿、查电量等。（V3.0 新增）PS.这个APK主要是学习与自用，如有BUG请提ISSUE，同时欢迎大家提PR指正

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

A complete and graceful API for Wechat. 微信个人号接口、微信机器人及命令行微信，三十行即可自定义个人号机器人。

Open Source alternative to Algolia + Pinecone and an Easier-to-Use alternative to ElasticSearch ⚡ 🔍 ✨ Fast, typo tolerant, in-memory fuzzy Search Engine for building delightful search experiences

API, CLI, and Web App for analyzing and finding a person's profile in 1000 social media \ websites

Python ProxyPool for web spider

Microsoft REST API Guidelines

Checklist of the most important security countermeasures when designing, testing, and releasing your API

lightweight, idiomatic and composable router for building Go HTTP services

A WhatsApp client library for NodeJS that connects through the WhatsApp Web browser app

A collection of awesome .NET libraries, tools, frameworks and software

:honeybee: A collection of awesome .NET core libraries, tools, frameworks and software

Security Guide for Developers

Normalizes nested JSON according to a schema

Collection of comprehensive TypeScript libraries for Interaction with the Ethereum JSON RPC API and utility functions.

SpiderFoot automates OSINT for threat intelligence and mapping your attack surface.

Bitwarden infrastructure/backend (API, database, Docker, etc).

🚀「Douyin_TikTok_Download_API」是一个开箱即用的高性能异步抖音、快手、TikTok、Bilibili数据爬取工具，支持API调用，在线批量解析及下载。

Open-source platform for creating safe, isolated production sandboxes for API, integration, and E2E testing.

Industry standard API mocking for JavaScript.

Chrome Extensions Samples

Cross-platform, graphics API agnostic, "Bring Your Own Engine/Framework" style rendering library.

The Cloud-Native API Gateway and AI Gateway

E-mails, subdomains and names Harvester - OSINT

收集免费的接口服务,做一个api的搬运工

An API wrapper for Discord written in Python.

Amplication brings order to the chaos of large-scale software development by creating Golden Paths for developers - streamlined workflows that drive consistency, enable high-quality code practices, simplify onboarding, and accelerate standardized delivery across teams.

API Support for your favorite torrent trackers

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

Free and Open Source Machine Translation API. Self-hosted, offline capable and easy to setup.

An API documentation generator for JavaScript.

🚀🎉📚 APITable, an API-oriented low-code platform for building collaborative apps and better than all other Airtable open-source alternatives.

A simple server for sending and receiving messages in real-time per WebSocket. (Includes a sleek web-ui)

A next generation HTTP client for Python. 🦋

TikTok 发布/喜欢/合辑/直播/视频/图集/音乐；抖音发布/喜欢/收藏/收藏夹/视频/图集/实况/直播/音乐/合集/评论/账号/搜索/热榜数据采集工具/下载工具

🤖 GPU accelerated Neural networks in JavaScript for Browsers and Node.js

Python version of the Playwright testing and automation library.

高效率 QQ 机器人支持库

Proxy server to bypass Cloudflare protection

提高 Android UI 开发效率的 UI 库

微信机器人 / 可能是最优雅的微信个人号 API ✨✨