Go · PyPI · npm99Exceptionalhealth index

go-gitea/giteaGit with a cup of tea! Painless self-hosted all-in-one software development service, including Git hosting, code review, team collaboration, package registry and CI/CD
Go★ 57.2KAug 4, 2026
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Python★ 8,423↓ 2.1M/moAug 27, 2026
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scalar/scalarScalar is an open-source API platform: 🌐 Modern REST API Client 📖 Beautiful API References ✨ 1st-Class OpenAPI/Swagger Support
TypeScript · Vue★ 15.8K↓ 6.1M/moAug 5, 2026
Packagist98Exceptionalhealth index
api-platform/coreThe server component of API Platform: hypermedia and GraphQL APIs in minutes
PHP★ 2,567↓ 943.1K/moJul 20, 2026
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fastapi/fastapiFastAPI framework, high performance, easy to learn, fast to code, ready for production
Python★ 101.3K↓ 550M/moAug 4, 2026
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JavaScript · TypeScript★ 9,461↓ 49.5K/moAug 28, 2026
npm · Packagist98Exceptionalhealth index

swagger-api/swagger-uiSwagger UI is a collection of HTML, JavaScript, and CSS assets that dynamically generate beautiful documentation from a Swagger-compliant API.
JavaScript★ 29K↓ 50.3M/moAug 5, 2026
Packagist97Exceptionalhealth index
PHP★ 2,566Jul 16, 2026
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orval-labs/orvalorval is able to generate client with appropriate type-signatures (TypeScript) from any valid OpenAPI v3 or Swagger v2 specification, either in yaml or json formats. 🍺
TypeScript★ 6,401↓ 61.5M/moAug 28, 2026
PyPI97Exceptionalhealth index
Python★ 3,501Aug 3, 2026
NuGet96Exceptionalhealth index
C#★ 5,496Aug 28, 2026
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JavaScript★ 1,092↓ 9.7M/moAug 27, 2026
Go · RubyGems96Exceptionalhealth index
Go★ 20KAug 5, 2026
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stoplightio/prismTurn any OpenAPI2/3 and Postman Collection file into an API server with mocking, transformations and validations.
TypeScript★ 5,017↓ 3.3M/moAug 27, 2026
npm96Exceptionalhealth index
JavaScript★ 2,694Aug 27, 2026
npm96Exceptionalhealth index
zuplo/zudokuFramework for building high quality, interactive API documentation.
TypeScript★ 561↓ 3,737/moJul 20, 2026
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asyncapi/modelinaA library for generating typed models based on inputs such as AsyncAPI, OpenAPI, and JSON Schema documents with high customization
TypeScript★ 442↓ 648.8K/moJul 20, 2026
PyPI95Exceptionalhealth index

koxudaxi/datamodel-code-generatorGenerate Pydantic v2 models, dataclasses, TypedDict, and msgspec.Struct from OpenAPI, JSON Schema, GraphQL, Avro, Protobuf, and raw JSON/YAML/CSV.
Python★ 4,007↓ 18.7M/moAug 28, 2026
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marshmallow-code/apispecA pluggable API specification generator. Currently supports the OpenAPI Specification (f.k.a. the Swagger specification)..
Python★ 1,218Jul 28, 2026
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TypeScript · Vue★ 64.4K↓ 46.3K/moAug 4, 2026
npm94Exceptionalhealth index
Azure/oavTools for validating OpenAPI (Swagger) files.
TypeScript★ 105↓ 45.7K/moJul 21, 2026
Go94Exceptionalhealth index
Go · Go Template★ 8,542Aug 28, 2026
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stoplightio/spectralA flexible JSON/YAML linter for creating automated style guides, with baked in support for OpenAPI (v3.1, v3.0, and v2.0), Arazzo v1.0, as well as AsyncAPI v2.x.
TypeScript★ 3,172↓ 78M/moAug 4, 2026
npm93Exceptionalhealth index

Azure/autorestOpenAPI (f.k.a Swagger) Specification code generator. Supports C#, PowerShell, Go, Java, Node.js, TypeScript, Python
TypeSpec · TypeScript★ 4,798Aug 28, 2026
Maven · npm93Exceptionalhealth index
Java · Vue★ 13.5KAug 27, 2026
Packagist · npm93Exceptionalhealth index
PHP★ 2,354↓ 1.2M/moJul 17, 2026
npm · Go93Exceptionalhealth index
Go★ 322↓ 2.5M/moAug 27, 2026
C#★ 240Jul 18, 2026
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hey-api/hey-api👨🚀 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.
TypeScript★ 5,321↓ 39.4M/moAug 28, 2026
npm92Excellenthealth index
readmeio/rdmeReadMe's official command-line interface (CLI) and GitHub Action 🌊
JavaScript · TypeScript★ 145↓ 452.6K/moJul 23, 2026