Flutter Gems
Flutter Gems is a curated list of 6700+ useful Dart & Flutter packages that are categorized based on functionality.
Top Flutter OpenAPI and Swagger packages
Last updated: June 22, 2025
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
👍 312 ⬇️ 49.3K
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.
openapi_generator
👍 113 ⬇️ 13.2K
Dart 3 compatibleMaintenance Status: Good
Generator for openapi client sdk inspired by the npm implementation of openapi-generator-cli.
swagger_parser
👍 95 ⬇️ 8.8K
Dart 3 compatibleMaintenance Status: Good
Package that generates REST clients and data classes from OpenApi definition file
shelf_swagger_ui
👍 81 ⬇️ 762
Dart 3 compatibleMaintenance Status: Good
Present clean and professional documentation with Swagger + shelf.
openapi_generator_annotations
👍 21 ⬇️ 22.8K
Dart 3 compatibleMaintenance Status: Good
Annotation package for openapi_generator https://pub.dev/packages/openapi_generator.
openapi_generator_cli
👍 20 ⬇️ 19K
Dart 3 compatibleMaintenance Status: Good
A dart wrapper around openapi-generator inspired by the node implementation.
openapi_freezed_dio_builder
👍 27 ⬇️ 562
Dart 3 compatibleMaintenance Status: Average
Generate models and API classes based on an OpenAPI document using Freezed and Dio.
nenuphar_cli
👍 27 ⬇️ 124
Dart 3 compatibleMaintenance Status: Average
An openapi generation CLI for Dart Frog created by Very Good CLI.
annotated_shelf
👍 23 ⬇️ 32
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 ⬇️ 76
Dart 3 compatibleMaintenance Status: Average
Flutter widgets that simplify the BLoC pattern implementation for REST APIs within an MVC architecture, significantly reducing boilerplate code.