#openapi

kubb-labs/kubb

TypeScript

89

health

🧡 The meta framework for code generation. Automate OpenAPI to type-safe TypeScript, Zod, and TanStack Query with a modular, plugin-based engine.

Tony133/fastify-api-boilerplate-jwt

TypeScript

89

health

An API Boilerplate to create a ready-to-use REST API in seconds with Fastify + Kysely and JWT Authentication

scalar/scalar

TypeScript

89

health

Scalar is an open-source API platform:　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　🌐 Modern REST API Client　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　📖 Beautiful API References　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　✨ 1st-Class OpenAPI/Swagger Support

schemathesis/schemathesis

Python

89

health

Catch API bugs before your users do

microcks/microcks

Java

89

health

The open source, cloud native tool for API Mocking and Testing. Microcks is a Cloud Native Computing Foundation incubating project 🚀

christianhelle/refitter

C#

89

health

A tool for generating Refit interfaces and contracts from OpenAPI (Swagger) specifications

microsoft/kiota

C#

87

health

OpenAPI based HTTP Client code generator

OpenAPITools/openapi-generator

Java

86

health

OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec (v2, v3)

motis-project/motis

C++

86

health

multimodal routing, geocoding, and map tiles

speakeasy-api/openapi

Go

86

health

A set of packages and tools for working with OpenAPI, Swagger, Arazzo and Overlay Specification documents.

specmatic/specmatic

Kotlin

85

health

Eliminate API integration headaches with Specmatic's no-code AI-powered API development suite. Teams ship APIs 10x faster by transforming specifications into executable contracts instantly—no coding required, no integration surprises.

kptdev/kpt

Go

84

health

Automate Kubernetes Configuration Editing

microsoft/OpenAPI.NET

C#

83

health

The OpenAPI.NET SDK contains a useful object model for OpenAPI documents in .NET along with common serializers to extract raw OpenAPI JSON and YAML documents from the model.

reshaprio/reshapr

Java

82

health

The open source, no-code MCP Server for AI-Native API Access

speakeasy-api/gram

Go

76

health

Securely scale AI usage across your organization. A single stack to Connect, Secure, Observe and Distribute agents, MCPs, and Skills within your company.

DataDog/datadog-api-client-ruby

Ruby

75

health

Ruby client for the Datadog API

nopara73/LongevityWorldCup

C#

69

health

Open-source longevity sport platform with biological-age calculators, athlete profiles, and public leaderboards.

microsoft/kiota-dart

Dart

65

health

Dart packages for generated Kiota client libraries