Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)
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Swagger UI is a collection of HTML, JavaScript, and CSS assets that dynamically generate beautiful documentation from a Swagger-compliant API.
OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec (v2, v3)
OpenAPI (f.k.a Swagger) Specification code generator. Supports C#, PowerShell, Go, Java, Node.js, TypeScript, Python
Library for OpenAPI 3 with spring-boot
A fast, lightweight and more productive microservices framework
Shuffle: A general purpose security automation platform. Our focus is on collaboration and resource sharing.
Self-Hosted API Management for Builders
The open source, cloud native tool for API Mocking and Testing. Microcks is a Cloud Native Computing Foundation incubating project 🚀
The Standard Webhooks specification
🦎 A lightweight, streaming-native, multi-protocol gateway for AI, APIs, and real-time data. Route LLM requests across providers, govern MCP tools, and connect Kafka, MQTT, and HTTP through one high-performance engine with shared security and observability.
GUI / visual editor for creating and editing OpenAPI / Swagger definitions
Parse, Resolve, and Dereference JSON Schema $ref pointers in Node and browsers
Utility for comparing two OpenAPI specifications.
API Gateway bridging modern and legacy APIs with WSDL-to-OpenAPI, SOAP-to-REST, XML, OAuth2, and GraphQL.
A framework for building integrations and APIs
The Arazzo Specification - A Tapestry for Deterministic API Workflows
A customizable style validator to make sure your OpenAPI spec follows your organization's standards.
WhimApp TSP (Transport Service Provider) Open API