Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)
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gRPC to JSON proxy generator following the gRPC HTTP spec
Scalar is an open-source API platform: 🌐 Modern REST API Client 📖 Beautiful API References ✨ 1st-Class OpenAPI/Swagger Support
Design-first Go framework that generates API code, documentation, and clients. Define once in an elegant DSL, deploy as HTTP and gRPC services with zero drift between code and docs.
Turn any OpenAPI2/3 and Postman Collection file into an API server with mocking, transformations and validations.
Huma REST/HTTP API Framework for Golang with OpenAPI 3.1
A REST API library with better functionality, performance, and scalability than refit
The Standard Webhooks specification
Golang Fuego - Web framework generating OpenAPI 3 spec from source code - Pluggable to existing Gin & Echo APIs
🦎 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.
Sweet web apis with Compojure & Swagger
Pode is a Cross-Platform PowerShell web framework for creating REST APIs, Web Sites, and TCP/SMTP servers
adidas group API design guidelines
REST framework for Delphi: JAX-RS style resources and routes, servers and clients, JWT, OpenAPI 3, FireDAC and Devart UniDAC/MyDAC/IBDAC, SSE, MCP servers for AI agents. Windows, Linux, Docker.
Lightweight embeddable web server written in pure C# with few dependencies to 3rd-party libraries.
A secure, efficient TCP/UDP tunneling solution that delivers fast, reliable access across network restrictions using pre-established TCP/QUIC/WebSocket or HTTP/2 connections.
go-redoc is an embedded OpenAPI/Swagger documentation ui for Go using ReDoc
Common LISP Kubernetes Client
Declarative API testing
Next-generation HTTP router for Go 1.27+ with type-safe handlers, RFC 9457 errors, and built-in OpenAPI generation. Minimal dependencies, blazing performance.