Open source. Open possibilities.

Automatically convert mitmproxy captures or HAR files into OpenAPI 3.0 specs, enabling reverse-engineering of REST APIs by observing traffic without manual analysis.

Open-source AI-native call center: voice AI answers first over OpenAI Realtime or Qwen, hands off to human agents on FreeSWITCH queues with a browser softphone. One Go binary with REST API, SSE, embedded React UI, and PostgreSQL.

@querry-kit/nest provides a suite of NestJS helpers for building Query Kit APIs. It includes features like field projection, Prisma-style query services, CASL authorization policies, OpenAPI decorators, pagination DTOs, and object utilities to streamline backend development.

A full-stack project template combining FastAPI, SQLModel, PostgreSQL, React, Vite, Tailwind CSS and shadcn/ui, with JWT auth, Docker Compose deployment, Traefik HTTPS, email recovery and CI/CD.

Open WebUI is a self-hosted, extensible AI platform that provides a user-friendly interface for local and cloud-based models, supporting Ollama and OpenAI-compatible APIs.

A self-hosted data API for Douyin and TikTok. It fetches posts, profiles, comments, and playlists, and downloads videos and image albums without watermarks. Features a self-healing identity pool, PostgreSQL archiving, REST API, MCP server, CLI, and a web console.

API Platform is a next-generation web framework installer that scaffolds API-first projects with REST/GraphQL APIs, auto-generated documentation, admin interfaces, and Jamstack client apps built on Symfony and React.

A Kiota-generated .NET client for the Docker Hub API, distributed via NuGet. It supports bearer-token authentication, builder-style request paths under client.V2, explicit pagination, generated response and error models, and a companion package for dependency injection and cached client construction.

ParkCore is a parking operations system for independent parking lot owners: manage facilities and visibility, check vehicles in and out, track active and past sessions, and serve a read-only public catalog. It is deliberately not a reservation marketplace or payment platform.

FastAPI is a modern Python web framework for building APIs with standard type hints, featuring automatic OpenAPI documentation, data validation via Pydantic, high performance via Starlette, and interactive Swagger UI and ReDoc interfaces.

truss is a Rust image toolkit providing CLI, HTTP, and WASM interfaces for format conversion, resizing, optimization, and SVG sanitization with signed URLs and SSRF protection.

Stealth is an open-source, self-hostable developer cloud platform for deploying apps, functions, sites, databases, storage, and AI agents. Built with a Go control plane and Next.js console, it offers Docker-based infrastructure management.

High-performance AI gateway unifying 23+ providers via OpenAI-compatible API. Features semantic caching, auto-failover, load balancing, and enterprise controls. Deployable via Docker or NPX with zero config.

Ultralytics OpenAPI generates interactive API docs and typed Python SDKs from OpenAPI 3.0-3.2 specs, with configurable branding, auth, and CLI support.

Plasm is a typed capability graph (CGS), wire mappings (CML), and path-expression language for agents interacting with real APIs. It includes 42 curated API catalogs, validation before transport, HTTP and MCP hosts, and a remote terminal. Built in Rust with optional Elixir support.

A .NET utility that supplies a thread-safe, lazily created singleton Kiota client for the Copper CRM API, with DI registration helpers and configuration for API key, token-owner email, application and base URL.

Bruno is an open-source API client for exploring and testing APIs, designed as a lightweight, offline-only alternative to tools like Postman and Insomnia.

An open-source, multi-provider LLM chat platform featuring organization management, model routing, RAG integration, sandboxed code execution, and OpenAI-compatible APIs.

Apache APISIX is a dynamic, real-time, high-performance cloud-native API and AI gateway built on NGINX and etcd, offering dynamic routing, plugin hot-loading, multi-protocol support, and AI proxying for LLM workloads.

fastapi-faults is an MIT-licensed Python package for FastAPI that defines typed RFC 9457 Problem Details from domain exceptions, reuses one immutable Fault definition for runtime responses and OpenAPI documentation, and supports feature-local registries, typed extension fields, and built-in framework error normalization.