Ariadne is a Python library for implementing GraphQL servers.

It presents a simple, easy-to-learn and extend API, with a declaratory approach to type definition that uses a standard Schema Definition Language shared between GraphQL tools, production-ready WSGI middleware, simple dev server for local experiments and an awesome GraphQL Playground for exploring your APIs.


  • Simple, quick to learn and easy to memorize API.
  • Compatibility with GraphQL.js version 14.0.2.
  • Queries, mutations and input types.
  • Asynchronous resolvers and query execution.
  • Subscriptions.
  • Custom scalars and enums.
  • Unions and interfaces.
  • Defining schema using SDL strings.
  • Loading schema from .graphql files.
  • WSGI middleware for implementing GraphQL in existing sites.
  • Opt-in automatic resolvers mapping between camelCase and snake_case.
  • Build-in simple synchronous dev server for quick GraphQL experimentation and GraphQL Playground.
  • Support for Apollo GraphQL extension for Visual Studio Code.
  • GraphQL syntax validation via gql() helper function. Also provides colorization if Apollo GraphQL extension is installed.

Requirements and installation

Ariadne requires Python 3.6 or 3.7 and can be installed from Pypi:

pip install ariadne