Open Source API Tools
Discover 179 open source API repositories from GitHub, each with an analysis of what it does, key features, use cases and alternatives. API projects here are most often combined with Self Hosted, Python and TypeScript. Last updated October 4, 2026.
179 repositories · updated October 4, 2026
wttr.in: Check Weather from the Terminal or Web
wttr.in is a weather forecast service designed for quick use from a terminal, browser, or script. It returns location-based forecasts in formats including ANSI, plain text, HTML, PNG, JSON, and Prometheus metrics.
react-admin: Build API-Backed Admin Applications
react-admin is a TypeScript and React framework for building browser-based administration apps on REST or GraphQL APIs. It provides reusable CRUD interfaces and customizable components, making it useful for teams that need an admin UI without building its foundations from scratch.
auth-sdk: Add Authentication to Saleor Storefronts
Saleor Auth SDK provides token-based authentication and authorization for storefronts using the Saleor API. It connects auth flows with React and GraphQL clients, with helpers for Next.js server-side cookie storage and OpenID Connect.
ARIES: Automate Infrastructure Operations with AI
ARIES is a Python-based operations platform that combines LLM agents, infrastructure monitoring, and automated remediation. It targets teams managing servers, networks, and MQTT devices, with REST API access and webhook alerts.
Douyin_TikTok_Download_API: Collect Data and Download Videos
A self-hosted API and console for collecting Douyin and TikTok posts, profiles, comments, and playlists, with no-watermark media downloads. It offers REST, MCP, and CLI access, and stores collected data in PostgreSQL.
deepface: Analyze and Recognize Faces in Python
DeepFace is a Python library that combines face recognition models and detection tools behind a simple API. Use it to verify identities, search face collections, generate embeddings, or estimate facial attributes.
swagger-editor: Edit and Preview API Specifications
Swagger Editor is a browser-based editor and embeddable JavaScript package for creating and reviewing API specifications. It supports OpenAPI and AsyncAPI formats, with plugins for editing, validation-oriented workflows, and previews.
cobalt: Download Public Media from Links
cobalt is a web app and API for downloading publicly accessible media from supported social and video platforms. It suits people who want a straightforward way to save media, and teams that want to run their own instance.
llama-cpp-python: Run llama.cpp Models from Python
Python bindings for llama.cpp let developers run GGUF language models locally through a high-level API, low-level C bindings, or an OpenAI-compatible server. Useful when you want local inference and control over hardware backends.
forwardemail.net: Operate a Privacy-Focused Email Service
Forward Email is an email service codebase for domain-based forwarding and hosted mail, with web, SMTP, IMAP, POP3, CalDAV, and CardDAV services. It suits teams seeking to run or develop a privacy-focused email platform.
bhvr: Start Full-Stack TypeScript Monorepo Projects
bhvr is a starter template for full-stack TypeScript apps, combining a Hono API and React client in a Bun-managed monorepo. It suits developers who want shared types and a flexible starting point without tying deployment to one platform.
instructor: Extract Validated Structured Data from LLMs
Instructor turns LLM responses into validated, typed Python objects using Pydantic models. It is useful for applications that need dependable extraction across providers, with retries and streaming handled through a consistent API.