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)

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

A fully open-source headless CMS with Git support, Markdown editing, and live visual preview for React-based sites.

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

Fast, typo-tolerant open-source search engine and a simpler, cheaper alternative to Algolia.

Open platform for governing execution authority at decision surfaces across agents, AI systems, and enterprise workflows.

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