Awesome GitHub RepositoriesAPI Client SDK Generators

This project is a command-line tool and template-based scaffolding engine that transforms API interface specifications into functional client libraries and server stubs. By automating the creation of type-safe SDKs and boilerplate code, it bridges the gap between service definitions and implementation, allowing developers to maintain synchronized codebases across many programming languages. The tool distinguishes itself through a portable execution model that utilizes containerized build isolation to ensure identical output regardless of the host environment. It features a modular, plugin-bas

Swagger Codegen is a template-driven engine and multi-language toolkit used to generate API client SDKs, server stubs, and human-readable documentation from OpenAPI specifications. It translates these specifications into functional libraries and boilerplate routing code across various target programming languages. The tool utilizes a pluggable generator module system and an integrated template engine, allowing for the customization of generated source code and the creation of new language-specific generators. It supports flexible specification sourcing via local files, remote HTTP endpoints,

Scalar is a platform for building and managing API specifications, focusing on OpenAPI and AsyncAPI standards. It provides tools to generate interactive API references with embedded testing interfaces, create mock servers for pre-implementation testing, and build offline-first API clients that sync with backend frameworks. The platform also supports version upgrades of specifications to maintain compatibility and includes command-line utilities for local development and document management. The project distinguishes itself through automated release workflows that generate changelogs and publi

LoopBack is a Node.js API framework used to build RESTful services and backend applications. It functions as a model-driven API generator that automatically maps predefined data models to network endpoints to create standardized web interfaces. The project features a database abstraction layer that unifies access across diverse SQL databases, NoSQL stores, and remote data sources. It includes a backend application scaffolder using command-line generators to automate the creation of project structures and data connectors. Additionally, it provides an API authentication system to manage applica

This project is a comprehensive geographic location dataset and reference library providing standardized data for countries, states, and cities. It serves as a source of truth for regional hierarchies, ISO codes, coordinates, and timezone information, available as both a relational SQL database and a document-based JSON library. The project includes a custom dataset export tool that functions as a filtering engine. This allows for the generation of tailored geographic files in JSON, CSV, and GeoJSON formats by selecting only the specific regions or fields required. The dataset covers global

The AWS SDK for Go is a software development kit and cloud infrastructure library used to programmatically interact with AWS cloud services. It provides a programmatic interface for authenticating requests, executing operations against regional endpoints, and automating the creation and management of cloud resources. The toolkit utilizes model-driven code generation to create service clients and employs a session-based configuration system to share credentials and global settings across those clients. It implements signature-based request authentication to verify identity and integrity throug

Airweave is a unified AI knowledge base platform that syncs data from external APIs into a searchable layer for retrieval-augmented generation. It provides a pre-built data connector library and a framework for building custom connectors, enabling the extraction, transformation, and synchronization of structured and unstructured data from SaaS applications. The platform includes a hybrid vector retrieval system that combines semantic, neural, and keyword search strategies to deliver grounded context for AI agents. The platform distinguishes itself through an agentic search engine that iterati

Typia is a compile-time code generator that transforms TypeScript type annotations into runtime validation, serialization, and schema functions without requiring decorators or separate schema files. It generates optimized validation and serialization code during TypeScript compilation, producing dedicated functions for each type that eliminate runtime schema objects for faster execution. The project extends this core capability into several integrated areas. It generates fully typed client SDKs from NestJS controller source code, keeping server and client types synchronized automatically. It

AliSQL is a fork of MySQL by Alibaba that extends the relational database management system with enhancements for high performance, scalability, and enterprise-grade availability. It retains the core MySQL identity as a SQL-based database for storing, organizing, and retrieving structured data, while adding optimizations for large-scale transactional and analytical workloads. The project differentiates itself through a set of Alibaba-specific improvements, including a columnar engine for accelerating analytical queries directly on MySQL tables, and a distributed, shared-nothing NDB Cluster en

ServiceStack es un framework web de alto rendimiento para .NET diseñado para construir APIs con seguridad de tipos utilizando objetos de solicitud y respuesta fuertemente tipados. Funciona como un motor de API basado en mensajes que desacopla la lógica de negocio de la capa de transporte, permitiendo que los servicios se expongan a través de múltiples protocolos, incluyendo HTTP, gRPC y varios proveedores de colas de mensajes. El framework se distingue por su generador de API con seguridad de tipos, que produce SDKs de cliente nativos y objetos de transferencia de datos (DTOs) a partir de metadatos de servicio en múltiples lenguajes. También incluye un gateway de servicios distribuidos para la orquestación de microservicios, un ORM code-first para traducir objetos C# directamente a registros de base de datos y un sistema centralizado de gestión de identidad y acceso para un acceso seguro basado en tokens. Su superficie de capacidades más amplia cubre la mensajería asíncrona y el streaming de eventos en tiempo real mediante Pub-Sub y Server-Sent Events. Proporciona un soporte integral de serialización de datos para formatos como JSON, XML, ProtoBuf y MessagePack, junto con flujos de autenticación integrados que incluyen JWT, claves API y autenticación de paso a paso. Herramientas adicionales incluyen la generación automatizada de API CRUD, ejecución de trabajos en segundo plano y plantillas de dashboard administrativo.

Ory Keto is an open-source authorization server that implements Google Zanzibar’s relationship-based access control model. It stores every access relationship as a tuple in a SQL database and exposes a declarative TypeScript-like namespace language for defining object types, relations, and permissions. The service provides bidirectional permission resolution, configurable consistency levels for checks, and dual gRPC and REST APIs for broad integration. Keto extends the Zanzibar model with edge enforcement of access policies, structured compliance auditing of permission decisions, and infrastr

orpc is a contract-first API development framework for TypeScript that starts with a shared contract definition and generates type-safe clients and servers from that single source of truth. It guarantees end-to-end type safety, meaning inputs, outputs, errors, and streaming data are all checked at compile time across the client–server boundary. What distinguishes orpc from typical RPC frameworks is its ability to export contracts as OpenAPI specifications, to optimize server-side rendering by calling API handlers directly inside the server process, and to support real‑time bidirectional commu

AutoRest es un generador de SDK multilenguaje y generador de código OpenAPI diseñado para producir kits de desarrollo de software consistentes a partir de una única definición de API. Funciona como un generador de clientes REST API que transforma archivos de especificación Swagger y OpenAPI en librerías de cliente HTTP tipadas y funcionales. La herramienta automatiza el flujo de trabajo de desarrollo de SDK convirtiendo documentos de diseño en código fuente, asegurando que las implementaciones resultantes coincidan con el contrato de API definido en diferentes lenguajes de programación. El sistema emplea desarrollo basado en especificaciones utilizando una representación intermedia para normalizar los datos antes de aplicar la lógica de generación específica del lenguaje. Utiliza generación de código basada en plantillas y plantillas de cliente conectables para mapear especificaciones de API abstractas en diversos patrones de sintaxis para múltiples runtimes de destino.

firebase-tools es una interfaz de línea de comandos y un orquestador de recursos en la nube utilizado para gestionar, probar y desplegar proyectos de Firebase. Sirve como la herramienta principal para administrar recursos en la nube, configurar ajustes de proyecto y manejar la autenticación desde una terminal. El proyecto incluye un emulador de servicios en la nube local que permite a los desarrolladores ejecutar versiones locales de servicios en la nube para verificar el comportamiento antes del despliegue en producción. También implementa un servidor basado en el Protocolo de Contexto de Modelo (Model Context Protocol) para exponer datos de proyectos y controles de servicio a asistentes de IA. La herramienta cubre una amplia gama de capacidades operativas, incluyendo el despliegue y monitoreo de funciones serverless, operaciones de base de datos NoSQL para Firestore y Realtime Database, y la distribución de binarios de aplicaciones móviles a los evaluadores. Además, proporciona utilidades para la validación de reglas de seguridad, gestión de configuración remota y migración de datos de cuentas de usuario.

RAML is a declarative YAML-based specification language used for modeling RESTful interfaces and data structures. It functions as a contract-first API framework and modeling standard, establishing a formal agreement for service communication and a single source of truth before implementation begins. The specification enables the automation of functional mock servers and the generation of language-specific client SDKs directly from the definition files. It supports a modular approach to API design through the use of external libraries, overlays for extending contracts, and reusable traits and

bknd is a self-hosted backend-as-a-service platform and serverless backend framework that provides an integrated environment for managing databases, authentication, and file storage. It functions as a headless CMS and a portable API engine designed to run across various JavaScript runtimes, including Node.js, Bun, Cloudflare Workers, and AWS Lambda. The project distinguishes itself through a combination of schema-driven API generation and a built-in database management UI. It enables the definition of data structures either programmatically via a type-safe API or visually through an administr

Fern is a toolset for managing API specifications, generating type-safe client libraries, and producing hosted developer documentation. It provides a utility for validating, transforming, and exporting API definitions into standardized OpenAPI formats, serving as a system to maintain a consistent source of truth for API designs. The project differentiates itself through an automated SDK distribution pipeline that publishes generated libraries to package managers such as npm, PyPI, Maven, and NuGet. It also includes an AI-powered search assistant trained on API and SDK specifications to answer

OpenAPI Generator CLI es una utilidad de línea de comandos diseñada para automatizar la creación de artefactos API a partir de archivos de especificación. Funciona como una herramienta para generar librerías cliente, stubs de servidor y documentación, permitiendo a los desarrolladores producir código boilerplate consistente y materiales de referencia a través de varios lenguajes de programación. El proyecto proporciona un wrapper que gestiona el ciclo de vida de un motor de ejecución basado en Java, el cual realiza la síntesis de código real utilizando plantillas sin lógica. Para asegurar resultados reproducibles y evitar conflictos de dependencias en el sistema host, la herramienta soporta gestión de motores versionada y entornos de ejecución contenerizados. Los usuarios pueden definir reglas de generación específicas del proyecto a través de archivos de configuración persistentes, los cuales automatizan tareas repetitivas y mantienen la consistencia a través de diferentes entornos de desarrollo. El conjunto de herramientas cubre el alcance completo de la producción de artefactos API, desde la creación inicial del esqueleto del servidor hasta la generación de kits de desarrollo de software cliente integrados.