API Tools

Promise based HTTP client (works in the browser too)

open source Kubernetes-native API gateway for microservices built on the Envoy Proxy

Scalable, customizable WebRTC SFU and server SDK for building real-time audio, video, and data applications with ease.

All-in-one platform for API testing, documentation, and collaboration, simplifying the entire API development lifecycle.

Swiftly design and ship best-practice GraphQL backends atop existing data sources and APIs.

Automated data integration platform that connects APIs, databases, and event streams using semantic schemas. Deploy secure integrations in minutes with Git-based workflows.

API gateway for microservices and communications

Universal HTTP client based on Fetch

Ultra performant API Gateway with middlewares. A project hosted at The Linux Foundation

Scalar is an open-source tool for building, customizing, and hosting interactive API documentation with OpenAPI support.

Embedded OpenAPI/Swagger documentation ui for Go using [ReDoc](https://redocly.com/)

An easy-to-use unofficial SDK for [Feishu](https://open.feishu.cn/) and [Lark](https://open.larksuite.com/) Open Platform