Browse Open Source "API" projects

Open source API development ecosystem - https://hoppscotch.io (open-source alternative to Postman, Insomnia)

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

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

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

Lunalytics is an open-source, self-hosted monitoring tool built with Node.js and React that supports HTTP(S), TCP, ping, Docker, and more. It offers customizable dashboards, status pages, incident management, multi-user access control, and integrations with popular notification services, making it a modern, developer-friendly solution for monitoring uptime and system health.

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

Open-source customer engagement. Automate transactional and marketing messages across email, SMS, mobile push, WhatsApp, Slack, and more 📨

The most intuitive desktop API client. Organize and execute REST, GraphQL, WebSockets, Server Sent Events, and gRPC 🦬

Database diagrams editor that allows you to visualize and design your DB with a single query.

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