👨‍🚀 Turn API specifications into production-ready SDKs, validators, mocks, and more. 20+ plugins. Millions of weekly npm downloads. Used by Vercel, OpenCode, PayPal, AWS, Autodesk, and many more.

python typescript sdk swagger openapi api-client developer-tools code-generation codegen sdk-generator

• Updated Nov 8, 2026
• TypeScript

Input OpenAPI. Output SDKs and Docs.

api openapi docs-generator sdk-generator docs-as-code

• Updated Nov 12, 2026
• TypeScript

Cortex - Generates interactive API documentation, typed SDKs, and MCP servers from OpenAPI, AsyncAPI, GraphQL, gRPC, OpenRPC, and Markdown.

graphql markdown docs protobuf mcp swagger grpc api-documentation openapi api-client code-generation sdk-generator documentation-generator asyncapi api-reference openapi-generator openrpc mcp-server mode-context-protocol

• Updated Oct 6, 2026
• TypeScript

Generates a PHP SDK based on a WSDL, simple and powerful, WSDL to PHP

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• Updated Jun 30, 2026
• PHP

Generating SDKs for multiple programming languages and platforms ⚙️

nodejs javascript ruby kotlin python dart swift php web js multiple-languages flutter hacktoberfest sdk-generator

• Updated Nov 12, 2026
• Twig

OpenAPI 3.x code generator for deterministic, type-safe SDKs and API tooling across languages and runtimes.

cli openapi type-safe code-generation codegen sdk-generator openapi3 api-tools

• Updated Nov 12, 2026
• Rust

The open-source Stainless — point your existing stainless.yml at it and get the same idiomatic Python SDK. Zero migration. No SaaS.

python openapi api-client developer-tools codegen sdk-generator stainless openapi-codegen pydantic httpx oss-alternative

• Updated May 22, 2026
• Python

easytemplate is Go's text/template with 🦸 JS super powers 🦸

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• Updated Jun 6, 2026
• Go

Best-in-class SDKs generated from OpenAPI, in your favorite languages

sdk swagger openapi openapi-specification sdk-generator openapi3

• Updated Jun 22, 2026

Generate interactive API documentation and typed Python SDKs from any OpenAPI specification

python typescript nextjs api-documentation openapi api-client developer-tools code-generation python-sdk sdk-generator documentation-generator bun api-reference openapi-generator ultralytics

• Updated Oct 30, 2026
• TypeScript

Generate typed Python API clients from OpenAPI 3.0/3.1 specs, built on unihttp. adaptix/pydantic/msgspec models, sync & async clients, mypy --strict-clean output

python code-generator async rest-api swagger http-client openapi api-client type-safe codegen sdk-generator openapi3 client-generator openapi-generator pydantic msgspec adaptix unihttp

• Updated Aug 17, 2026
• Python

Open-source SDK generator for OpenAPI 3: idiomatic Rust, TypeScript, Python, Go and Java clients as pull requests. GitHub-native, no cloud, no subscription. Self-hosted alternative to Fern, Speakeasy and Stainless.

python java rust cli golang typescript sdk csharp openapi api-client self-hosted developer-tools code-generation codegen sdk-generator client-generator openapi-generator github-actions fern-alternative speakeasy-alternative

• Updated Nov 12, 2026
• Rust

JS-SDKGen is a Javascript SDK Code generator for your API. It uses apidoc definitions from swagger or apidocjs and generates the Javascript SDK automatically. Along with SDK, it also generates SDK usage documentation, thus saving hours of work for you in writing SDK & usage documentation

code-generator code-generation javascript-sdk sdk-generator sdk-generation

• Updated Jan 4, 2023
• JavaScript

Android Unreal Engine 外部分析与 SDK 生成工具，支持 AutoFix、依赖排序、字段修补与 ProcessEvent Wrapper。

android vulkan reverse-engineering imgui unreal-engine ue4 sdk-generator ue5

• Updated Jul 21, 2026
• C++

One spec, every SDK. Self-hosted, air-gapped OpenAPI SDK generator: idiomatic SDKs in 6 languages (TS/Python/Go/Java/Ruby/C#) + an MCP server, zero runtime deps, verified on every build.

python api golang typescript sdk mcp openapi self-hosted developer-tools code-generation codegen sdk-generator openapi-generator model-context-protocol

• Updated Jul 13, 2026
• TypeScript

Reflection extraction and analysis for Unreal Engine, Unity IL2CPP and Unity Mono. No engine-version table: every offset is derived at runtime, and Unity metadata is solved by constraint rather than parsed with a per-version struct table.

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• Updated Nov 7, 2026
• C++

Windows x64 Unity IL2CPP metadata workbench for static dumping, package inspection, cross-version migration, and deterministic C++20 SDK generation with UniResolver.

windows metadata unity reverse-engineering unity3d il2cpp sdk-generator dumper cpp20 il2cpp-modding il2cpp-dumper uniresolver

• Updated Sep 5, 2026
• C++

Protoc plugin that generates a fully type-safe Vue 3 SDK from your Protobuf schemas — ConnectRPC client, TanStack Query (vue-query) hooks, query-key factory, and message initializers. The Vue-native alternative to connect-query.

typescript vue grpc protoc codegen sdk-generator grpc-web protoc-plugin vue3 buf vue-query tanstack-query connectrpc connect-rpc

• Updated Oct 20, 2026
• Mustache

Redwood generates TypeScript, Go, Python and Ruby SDKs, a Go CLI and API docs from one OpenAPI 3.0 or 3.1 document, with one Rust binary.

ruby python rust cli golang typescript sdk code-generator openapi codegen sdk-generator openapi-generator

• Updated Oct 17, 2026
• Rust

A GitHub Action that installs the Fern CLI into a workflow using npm.

api openapi docs-generator sdk-generator docs-as-code

• Updated Nov 4, 2026