Open-source api-framework software
2097 open-source libraries, tools and applications tagged api-framework, ranked by how closely api-framework is their primary purpose, then by adoption and maintenance health. Each entry links to a page with sources, use cases and when to choose or avoid it.
2097 products, primary matches first, then adoption-weighted; health v2 shown.
| Product | Health v2 | Stars | Maturity |
|---|---|---|---|
| swagger-api/swagger-editor Swagger Editor is a browser-based and embeddable editor for authoring OpenAPI and Swagger API specifications in YAML/JSON. It is available … | 93 | 9466 | active |
| usekaneo/kaneo Kaneo is an open-source, self-hosted project management application with kanban boards, list views, labels, priorities, and GitHub/Gitea is… | 84 | 9404 | active |
| vitalik/django-ninja Django Ninja is a web framework for building REST APIs with Django using Python type hints, powered by Pydantic for validation and serializ… | 97 | 9204 | stable |
| mark3labs/mcp-go A Go SDK implementing the Model Context Protocol (MCP), letting developers build MCP servers that expose tools, resources, and prompts to L… | 82 | 9132 | active |
| teamhanko/hanko Hanko is an open-source authentication and user management platform built in Go, offering passwords, passkeys (WebAuthn/FIDO2), MFA, OAuth … | 95 | 9041 | active |
| gorush Gorush is a push notification micro server written in Go using the Gin framework. It exposes a REST API and CLI for sending notifications t… | 85 | 8779 | active |
| OwO-Network/DLX DLX (formerly DeepLX) is a self-hosted translation API server written in Go that exposes a simple HTTP API on port 1188 for machine transla… | 91 | 8714 | active |
| oapi-codegen/oapi-codegen oapi-codegen is a command-line tool and Go library that generates Go server boilerplate, API clients, and HTTP models from OpenAPI 3.0/3.1 … | 89 | 8592 | active |
| Sylius/Sylius Sylius is an open-source headless eCommerce platform and framework built on top of PHP/Symfony and API Platform. It provides a powerful RES… | 93 | 8545 | active |
| litestar-org/litestar Litestar is a production-ready, highly performant, extensible ASGI API framework for Python, formerly known as Starlite. It provides REST A… | 96 | 8523 | active |
| vendurehq/vendure Vendure is an open-source, plugin-first headless commerce platform built with TypeScript, NestJS, GraphQL, and a React admin dashboard. It … | 96 | 8492 | active |
| Graphene Graphene is a code-first Python library for building GraphQL schemas and APIs, with built-in Relay support and integrations for Django, SQL… | 48 | 8237 | stable |
| fonoster/fonoster Fonoster is an open-source programmable telecommunications stack (a Twilio alternative) for building voice and messaging applications, with… | 98 | 8142 | active |
| OSRM OSRM is a high-performance C++ routing engine built on OpenStreetMap data, exposing services via HTTP API, C++ library, and Node.js wrapper… | 95 | 8105 | active |
| TypeGraphQL TypeGraphQL is a TypeScript framework for building GraphQL APIs using classes and decorators instead of SDL files, generating the schema fr… | 81 | 8091 | active |
| R2R R2R is a production-ready AI retrieval system implementing agentic Retrieval-Augmented Generation (RAG) with a RESTful API. It provides sta… | 47 | 8010 | active |
| hotheadhacker/no-as-a-service No-as-a-Service is a lightweight Express.js REST API that returns a random, witty rejection reason as JSON. It is hosted publicly and can a… | 53 | 7997 | stable |
| Traccar Traccar is an open-source GPS tracking server written in Java that supports 200+ GPS protocols and 2000+ tracking device models. It provide… | 99 | 7874 | stable |
| BTCPay Server BTCPay Server is a free, open-source, self-hosted Bitcoin payment processor written in C#. It lets merchants accept direct, non-custodial B… | 99 | 7814 | stable |
| midwayjs/midway Midway is a progressive, TypeScript-first Node.js framework from Alibaba's Taobao frontend architecture team, built around a custom depende… | 100 | 7754 | active |
| EricLBuehler/mistral.rs mistral.rs is a fast and flexible LLM inference engine written in Rust, supporting many model families with quantization (ISQ/UQFF, GGUF), … | 92 | 7741 | active |
| InvenTree InvenTree is an open-source inventory management system built with Python and Django, providing a web interface and REST API for tracking p… | 96 | 7725 | active |
| jianchang512/ChatTTS-ui A local web interface for the ChatTTS text-to-speech model that synthesizes speech from mixed Chinese/English text, numbers, and symbols. I… | 65 | 7664 | active |
| devlikeapro/waha WAHA is a self-hosted WhatsApp HTTP API that wraps multiple community engines (WEBJS, NOWEB, GOWS) behind a unified REST API and webhook in… | 94 | 7580 | active |
| 42wim/matterbridge Matterbridge is a self-hosted chat bridge written in Go that relays messages between many chat platforms such as Slack, Discord, Telegram, … | 23 | 7577 | active |
| swagger-api/swagger-core Swagger Core is a Java library that implements the OpenAPI Specification, generating OpenAPI 3.x definitions from JAX-RS (javax and jakarta… | 96 | 7529 | stable |
| Agent-Native Agent-Native is an open-source TypeScript framework for building applications that serve both human users and AI agents from a single codeb… | 79 | 7463 | active |
| RicoSuter/NSwag NSwag is a Swagger/OpenAPI 2.0 and 3.0 toolchain for .NET, ASP.NET Core, and TypeScript, written in C#. It generates OpenAPI specifications… | 83 | 7366 | active |
| modelcontextprotocol/registry A community-driven registry service for Model Context Protocol (MCP) servers, acting like an app store where MCP clients can discover serve… | 83 | 7268 | active |
| mher/flower Flower is an open-source web application for monitoring and managing Celery clusters in real time. It provides a dashboard for task and wor… | 83 | 7238 | active |
| KubeVirt KubeVirt is a virtual machine management add-on for Kubernetes that extends the Kubernetes API with virtualization resource types (like the… | 100 | 7131 | stable |
| hydro-dev/Hydro Hydro is a high-performance, self-hostable online judge platform for competitive programming and informatics education, built in TypeScript… | 68 | 7116 | active |
| goproxy/goproxy.cn Goproxy.cn is a free, non-profit Go module proxy service hosted in China and backed by Qiniu Cloud's global CDN. It fully implements the GO… | 45 | 7081 | stable |
| flexprice/flexprice Flexprice is an open-source usage-based pricing and billing platform for developers, offering real-time usage metering, credits and wallets… | 85 | 6894 | active |
| gotson/komga Komga is a self-hosted media server for comics, mangas, BDs, magazines and eBooks (CBZ/CBR, EPUB, PDF). It provides a responsive web UI, we… | 100 | 6768 | active |
| kubernetes-sigs/metrics-server Metrics Server is a scalable, efficient source of container CPU and memory resource metrics for Kubernetes built-in autoscaling pipelines. … | 93 | 6761 | stable |
| requestly/requestly Requestly API Client is a lightweight, Git-native desktop API client for designing, building, and testing REST, GraphQL, SOAP, and gRPC API… | 87 | 6759 | active |
| internetarchive/openlibrary Open Library is an open, editable library catalog from the Internet Archive aiming to create one web page for every book ever published, wi… | 95 | 6752 | active |
| x402-foundation/x402 x402 is an open standard and SDK suite for internet-native payments built on the HTTP 402 status code, letting servers charge for API or co… | 64 | 6674 | active |
| PHP OAuth2 Server A standards-compliant OAuth 2.0 authorization server library for PHP, supporting all major grants (authorization code, client credentials, … | 88 | 6668 | stable |
| django-oscar Django-Oscar is a domain-driven e-commerce framework for Django that lets every part of the core be customized or overridden. It supports a… | 87 | 6624 | active |
| MISP MISP is an open source threat intelligence platform for collecting, storing, correlating, and sharing cyber security indicators, malware an… | 96 | 6546 | stable |
| basketikun/chatgpt2api A self-hosted reverse-engineered implementation of ChatGPT's official web interfaces, exposing OpenAI-compatible API endpoints for text gen… | 71 | 6544 | active |
| OnlineJudge A self-hosted online judge system for hosting programming contests and problem sets, built with Django (backend), Vue (frontend), and a Doc… | 23 | 6542 | stable |
| crestalnetwork/intentkit IntentKit is an open-source, self-hosted cloud-native agent cluster that runs and manages a collaborative team of AI agents as containerize… | 76 | 6516 | active |
| Jeepay Jeepay is an open-source aggregated payment system for internet businesses, supporting normal merchant mode, multi-channel service-provider… | 87 | 6438 | active |
| dmunozv04/iSponsorBlockTV A self-hosted Python application that connects to YouTube TV apps on smart TVs and streaming devices and automatically skips sponsor segmen… | 96 | 6419 | active |
| filipedeschamps/tabnews.com.br TabNews is the open-source codebase of a Brazilian community website for programming and technology discussions, where users publish posts … | 76 | 6381 | active |
| pheralb/svgl SVGL is a curated library of 600+ optimized SVG logos for brands and technologies, served through a searchable web app and a free REST API.… | 66 | 6339 | active |
| Open-Meteo Open-Meteo is an open-source weather API service that aggregates numerical weather prediction models from 15+ national weather services int… | 85 | 6244 | active |
| GraphQL Java GraphQL Java is the standard JVM implementation of the GraphQL specification, providing schema parsing, schema generation, and query execut… | 97 | 6220 | stable |
| Passbolt Passbolt Community Edition API is the JSON backend for the open source, security-first password manager for teams, built in PHP on CakePHP.… | 96 | 6136 | stable |
| KServe KServe is a CNCF incubating, Kubernetes-native platform for serving both generative and predictive AI models at scale. It provides a standa… | 94 | 6133 | stable |
| Goa Goa is a design-first framework for building APIs and microservices in Go. You define your API in a Go-based DSL and it generates server co… | 99 | 6110 | active |
| Weblate Weblate is a libre, web-based continuous localization platform with tight version control (Git, Mercurial) integration, built in Python/Dja… | 99 | 6109 | stable |
| h2non/imaginary Imaginary is a fast HTTP microservice written in Go for high-level image processing, backed by bimg and libvips. It exposes image operation… | 42 | 6084 | stable |
| postmanlabs/postman-app-support Postman is a widely used API platform for building, testing, designing, and collaborating on APIs, offered as a desktop app and web service… | 75 | 6020 | active |
| FastEndpoints/FastEndpoints FastEndpoints is a lightweight REST API development framework for ASP.NET 8 and newer that serves as a developer-friendly alternative to Mi… | 92 | 6017 | active |
| GraphQL for .NET (GraphQL.NET) A .NET implementation of the GraphQL query language, providing a lexer/parser, schema definition, and execution engine for building GraphQL… | 96 | 5986 | active |
| Michael-A-Kuykendall/shimmy Shimmy is a single-binary, OpenAI-compatible LLM inference server written in pure Rust, running GGUF models on a WebGPU-based engine (Airfr… | 86 | 5983 | active |
| YMFE/yapi YApi is a self-hostable, visual API management platform for defining, documenting, mocking, and testing HTTP interfaces across developers, … | 23 | 27716 | maintenance |
| Zammad Zammad is a web-based, open-source helpdesk and customer support/ticketing platform that unifies customer communication across channels lik… | 76 | 5974 | stable |
| graphql-rust/juniper Juniper is a GraphQL server library for Rust that enables building type-safe, fast GraphQL servers. It provides schema declaration and reso… | 85 | 5968 | active |
| sooperset/mcp-atlassian A Model Context Protocol (MCP) server that connects AI assistants like Claude Desktop and Cursor to Atlassian Jira and Confluence, supporti… | 80 | 5949 | active |
| capcom6/android-sms-gateway An Android application that turns a smartphone into an SMS and MMS gateway, exposing a REST API for sending messages programmatically and w… | 95 | 5905 | active |
| Guardian DotCom (theguardian.com) The backend Scala application powering theguardian.com, built as a set of Play Framework 2 services. It fetches content from the Guardian's… | 77 | 5899 | active |
| microsoft/typespec TypeSpec is a Microsoft-built, extensible DSL and toolchain for defining cloud service APIs and data shapes as a single source of truth. It… | 95 | 5891 | active |
| aiogram/aiogram aiogram is a modern, fully asynchronous Python framework for the Telegram Bot API, built on asyncio and aiohttp. It provides routers, middl… | 96 | 5888 | active |
| WebAssembly/WASI WASI (WebAssembly System Interface) is a set of standardized APIs that let WebAssembly modules access system resources like files, clocks, … | 91 | 5818 | active |
| Vikunja Vikunja is an open-source, self-hostable to-do and task management application with list, Kanban, Gantt, and table views, built with a Go b… | 100 | 5806 | active |
| Kill Bill Kill Bill is an open-source subscription billing and payments platform that manages subscriptions, invoicing, payment processing, and dunni… | 94 | 5801 | stable |
| ChilliCream GraphQL Platform ChilliCream GraphQL Platform is a suite of open-source .NET tools for building GraphQL APIs, including the Hot Chocolate GraphQL server, th… | 96 | 5760 | active |
| TencentBlueKing/bk-cmdb BlueKing CMDB is an enterprise-grade configuration management database (CMDB) platform for managing IT assets, applications, and business t… | 77 | 5755 | active |
| FxEmbed FxEmbed is a Cloudflare Worker service that powers FxTwitter, FixupX, and FxBluesky, rewriting X/Twitter and Bluesky links into rich embeds… | 77 | 5751 | active |
| middleapi/orpc oRPC is a TypeScript framework for building end-to-end typesafe APIs without code generation, combining RPC-style typed clients with first-… | 86 | 5702 | active |
| Notion JavaScript SDK The official JavaScript/TypeScript client library for the Notion REST API, published as @notionhq/client. It provides typed methods for que… | 100 | 5678 | stable |
| trailbaseio/trailbase TrailBase is an open-source, single-executable Firebase alternative built on Rust, SQLite (with experimental Postgres support), and Wasmtim… | 84 | 5638 | active |
| lm-sys/RouteLLM RouteLLM is a Python framework for serving and evaluating LLM routers that route queries between strong and weak models to cut costs. It pr… | 25 | 5626 | active |
| remsky/Kokoro-FastAPI A Dockerized FastAPI wrapper around the Kokoro-82M text-to-speech model exposing an OpenAI-compatible speech endpoint with CPU, NVIDIA, AMD… | 87 | 5543 | active |
| yournextstore/yournextstore Your Next Store is an open-source, AI-native Next.js e-commerce template powered by Stripe, with a typesafe Commerce Kit SDK. It is designe… | 65 | 5521 | active |
| PokeAPI/pokeapi PokeAPI is a free, open-source RESTful (and beta GraphQL) API serving comprehensive Pokémon game data such as species, moves, abilities, ty… | 68 | 5414 | active |
| ory/keto Ory Keto is an open-source authorization server implementing Google's Zanzibar model for scalable, low-latency permission checks. It suppor… | 74 | 5402 | active |
| agentejo/cockpit Cockpit is a self-hosted, API-first headless CMS written in PHP that adds content management to any site via REST/JSON APIs. It offers flex… | 32 | 5394 | active |
| novicezk/midjourney-proxy A Java-based proxy service that wraps MidJourney's Discord channel into a REST API, enabling programmatic AI image generation. It supports … | 43 | 5361 | active |
| winfunc/deepreasoning DeepReasoning is a high-performance Rust-based LLM inference API and chat UI that combines DeepSeek R1's chain-of-thought reasoning traces … | 28 | 5361 | active |
| Solidus Solidus is a free, open-source eCommerce platform built as a Ruby on Rails framework, providing a full storefront, admin dashboard, and com… | 100 | 5344 | active |
| dotnet-architecture/eShopOnContainers eShopOnContainers is a reference .NET application that demonstrates a microservices‑based e‑commerce system using Docker containers and Kub… | 10 | 24296 | maintenance |
| zircote/swagger-php A PHP library that generates OpenAPI (Swagger) documentation for RESTful APIs using PHP 8 attributes or legacy doctrine annotations embedde… | 95 | 5309 | active |
| Exrick/xpay XPay is a free, self-hosted personal payment collection system written in Java (Spring Boot) that lets individuals accept payments via Alip… | 32 | 5309 | active |
| Shlink Shlink is a self-hosted, PHP-based URL shortener that serves shortened URLs under your own domains. It provides a REST API, a CLI interface… | 97 | 5307 | stable |
| Mall4j Mall4j is an open-source Java e-commerce mall system built on Spring Boot 4, Vue3, Sa-Token, MyBatis-Plus, and Redis, providing product, or… | 77 | 5283 | active |
| su-kaka/gcli2api A self-hosted Python service that converts GeminiCLI and Antigravity into OpenAI-, Gemini-, and Claude-compatible API endpoints. It can be … | 63 | 5243 | active |
| typicode/jsonplaceholder JSONPlaceholder is a free online fake REST API for testing and prototyping, serving common resources like posts, comments, and users. It is… | 32 | 5239 | stable |
| pollinations/pollinations Pollinations is an open-source generative AI platform offering free APIs for text, image, and vision model inference without requiring API … | 77 | 5226 | active |
| linuxhsj/openclaw-zero-token OpenClaw Zero Token is a fork of OpenClaw that provides a unified gateway to major LLM providers (ChatGPT, Claude, Gemini, DeepSeek, Qwen, … | 71 | 5206 | active |
| AgnesAI-Labs/AgnesAI-Models Official gateway and model catalog for Agnes AI, providing OpenAI-compatible API access to multimodal foundation models covering text, imag… | 55 | 5192 | active |
| NdoleStudio/httpsms httpSMS is a service that turns an Android phone into an SMS gateway, letting you send and receive SMS messages programmatically via a simp… | 91 | 5160 | active |
| CKAN CKAN is an open-source data management system (DMS) for powering data hubs and open data portals, providing dataset cataloging, storage, ri… | 97 | 5141 | stable |
| go-restful A Go package for building REST-style web services with explicit HTTP method routing and path parameter support. It provides configurable ro… | 67 | 5113 | stable |
| LoopBack LoopBack 4 is a highly extensible Node.js and TypeScript framework for building REST APIs and microservices, driven by OpenAPI specificatio… | 77 | 5101 | active |