Top NAPI GitHub Repositories & Tools (2026)

A RESTful framework built on top of light-4j with both Swagger 2.0 and OpenAPI 3.0 supports

Generates OpenAPI / Swagger Documentation for Micronaut projects

Transforms a Hydra API doc in an intermediate representation that can be used for various tasks such as creating smart API clients, scaffolding code or building administration interfaces.

A Burp Suite extension that exposes the full Montoya API as a local REST API, with Swagger UI

Extensions for Microsoft.AspNetCore.OpenApi

Super-fast/easy runtime validators and serializers via transformation

Detect breaking changes between OpenAPI 3.0/3.1 specs. Explainable Web UI, CLI and CI gate; local-first and deterministic, with optional AI summaries.

C++23 client for Kalshi's Predictions API. Created from Kalshi's OpenAPI and AsyncAPI specs, it covers every REST operation and WebSocket channel. The WebSocket client reconnects and resubscribes. Optional transports add retries and rate limiting.

🗹 TypeScript HTTP Framework focusing on e2e type-safety, easy setup, performance & great developer experience

Generate Swift client and server code from an OpenAPI document.

gRPC to JSON proxy generator following the gRPC HTTP spec