Categories
API Development & Testing
API Development & Testing open-source alternatives curated by the directory.
API Development & Testing
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19 of 19 tools
Trieve
MIT
Trieve offers an all-in-one solution for search, recommendations, and RAG with automatic continuous improvement based on user feedback.
Firecamp
AGPL-3.0
All-in-one platform for API testing, documentation, and collaboration, simplifying the entire API development lifecycle.
Scalar
MIT
Scalar is an open-source tool for building, customizing, and hosting interactive API documentation with OpenAPI support.
LiveKit
Apache-2.0
Scalable, customizable WebRTC SFU and server SDK for building real-time audio, video, and data applications with ease.
Mockoon
MIT
Create, run, and share mock REST APIs without coding. Boost productivity with an intuitive interface and powerful features.
Tailcall
Apache-2.0
Swiftly design and ship best-practice GraphQL backends atop existing data sources and APIs.
WunderGraph
Apache-2.0
A powerful backend framework that simplifies API integration, enhances security, and boosts developer productivity for modern web applications.
Bruno
MIT
A modern, user-friendly API client that simplifies API testing and development with a clean interface and powerful features.
Gravitee
Apache-2.0
Full-lifecycle API management platform that unifies synchronous and asynchronous ecosystems. Manage APIs, event streams, and AI agents with enterprise security and 4x faster gateway performance.
Hive
MIT
A fully open-source schema registry, analytics, and gateway for GraphQL federation and APIs
Hoppscotch
MIT
Lightweight, fast, and feature-rich API client for developers. Test, debug, and document APIs with ease in a clean, modern interface.
HTTPie
BSD-3-Clause
Intuitive, user-friendly CLI tool for making HTTP requests, debugging APIs, and testing web services with ease and efficiency.
Insomnia
Apache-2.0
Intuitive API client for REST, GraphQL, and gRPC. Debug, test, and collaborate on APIs with ease across platforms.
Krakend
Apache-2.0
High-performance, stateless API gateway built for microservices. Handle 80K+ requests/second with transparent pricing and enterprise-grade reliability.
Requestly
Unknown
A powerful browser extension and desktop app for developers to manipulate network requests, debug APIs, and improve web app testing
Tyk
Unknown
Fast, scalable API management platform with open source gateway, analytics, dev portal and dashboard. Deploy anywhere with AI-ready governance and security.
UnKey
AGPL-3.0
Streamline API authentication with UnKey's powerful, developer-friendly platform for creating, revoking, and monitoring API keys.
Voiden
Apache-2.0
Offline-first API workspace that unifies specs, docs, tests, and mocks in programmable Markdown blocks. Version control everything in plain text files.
Yaak
MIT
A modern API client offering local-only data storage, Git integration, plugin extensibility, and multi-protocol support for developers.