Open source. Open possibilities.

Hoppscotch is an open-source API development ecosystem providing a lightweight alternative to Postman and Insomnia for testing and designing APIs.

JSON Server is a Node.js CLI tool that turns a JSON or JSON5 file into a full fake REST API in seconds, supporting CRUD, filtering, sorting, pagination, embedding, and static file serving for prototyping and testing.

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.

htmx is a small, dependency-free JavaScript library that lets you issue AJAX requests, use CSS transitions, WebSockets and Server Sent Events directly from HTML attributes, enabling hypertext-driven interfaces without heavy frontend frameworks.

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.

A comprehensive Node.js best practices guide covering project architecture, code style, testing, production, security, and more.

Strapi is a leading open-source headless CMS built in JavaScript/TypeScript, offering visual content modeling, auto-generated REST/GraphQL APIs, roles, media library, i18n, and plugin ecosystem.

React-admin is an open-source frontend framework by marmelab for building browser-based single-page admin applications on REST or GraphQL APIs, using TypeScript, React and Material Design. It ships hooks and components for authentication, routing, forms, validation, datagrids, search, i18n and theming.

HTTPie CLI is a modern, user-friendly command-line HTTP client designed for testing, debugging, and interacting with APIs and HTTP servers.

TanStack Query is an async state management library for the web that simplifies fetching, caching, synchronizing and updating server state, with adapters for React, Solid, Svelte and Vue.

A starter library designed to facilitate the integration and usage of Feign clients within Java applications.

Open-source documentation website for Harper, a fullstack serverful Node.js application platform. Built with Docusaurus and hosted at docs.harper.fast. Community contributions welcome via issues and pull requests.

PostgREST serves a fully RESTful API from any existing PostgreSQL database. It handles JWT authentication, delegates authorization to database roles, supports schema-based versioning, generates OpenAPI docs, and pushes data validation and JSON serialization into SQL.

Posting is a terminal-based HTTP client in the spirit of Postman and Insomnia. It stores requests as plain YAML files, works over SSH, and supports environments, autocompletion, tree-sitter highlighting, Vim keys, custom themes, Python hooks and cURL/Postman/OpenAPI import.