Flutter Gems
Flutter Gems is a curated list of 7100+ useful Dart & Flutter packages that are categorized based on functionality.
Top Flutter OpenAPI and Swagger packages
Last updated: March 18, 2026
OpenAPI, formerly known as Swagger, is a specification for building, documenting, and consuming APIs. It provides a standardized way to define RESTful APIs that enhances collaboration, simplifies development, and contributes to the creation of robust and user-friendly APIs.
The complete list of Dart and Flutter packages provided below provide openAPI & Swagger utilities for API client code generation for sending HTTP requests, building API client libraries that you can add in your Flutter app.
swagger_dart_code_generator
👍 327 ⬇️ 61K
Dart 3 compatibleMaintenance Status: Good
Have you been turned into a problem with writing code for Http requests? This package can help. It has all of the Http and model codegen functionality you have been looking for.
swagger_parser
👍 118 ⬇️ 23.9K
Dart 3 compatibleMaintenance Status: Good
Package that generates REST clients and data classes from OpenApi definition file
openapi_generator
👍 120 ⬇️ 9.8K
Dart 3 compatibleMaintenance Status: Average
Generator for openapi client sdk inspired by the npm implementation of openapi-generator-cli.
shelf_swagger_ui
👍 85 ⬇️ 1.3K
Dart 3 compatibleMaintenance Status: Average
Present clean and professional documentation with Swagger + shelf.
openapi_generator_annotations
👍 21 ⬇️ 31.9K
Dart 3 compatibleMaintenance Status: Average
Annotation package for openapi_generator https://pub.dev/packages/openapi_generator.
openapi_generator_cli
👍 20 ⬇️ 16.4K
Dart 3 compatibleMaintenance Status: Average
A dart wrapper around openapi-generator inspired by the node implementation.
nenuphar_cli
👍 29 ⬇️ 174
Dart 3 compatibleMaintenance Status: Poor
An openapi generation CLI for Dart Frog created by Very Good CLI.
openapi_freezed_dio_builder
👍 28 ⬇️ 96
Dart 3 compatibleMaintenance Status: Average
Generate models and API classes based on an OpenAPI document using Freezed and Dio.
annotated_shelf
👍 23 ⬇️ 115
Dart 3 compatibleMaintenance Status: Poor
powerful Dart library for generating REST APIs using annotations. With a simple and intuitive interface, you can easily build APIs that are fast, efficient, and easy to use.
api_bloc
👍 10 ⬇️ 120
Dart 3 compatibleMaintenance Status: Average
Flutter widgets that simplify the BLoC pattern implementation for REST APIs within an MVC architecture, significantly reducing boilerplate code.
flutter_easy_swagger_generator
👍 2 ⬇️ 98
Dart 3 compatibleMaintenance Status: Good
A Flutter package for generating Dart models and API clients from Swagger/OpenAPI specifications.