flask-smorest

June 3, 2026 ยท View on GitHub

============= flask-smorest

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.. |build-status| image:: https://github.com/marshmallow-code/flask-smorest/actions/workflows/build-release.yml/badge.svg :target: https://github.com/marshmallow-code/flask-smorest/actions/workflows/build-release.yml :alt: Build status

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.. |docs| image:: https://readthedocs.org/projects/flask-smorest/badge/ :target: https://flask-smorest.readthedocs.io/ :alt: Documentation

.. |coverage| image:: https://codecov.io/gh/marshmallow-code/flask-smorest/branch/main/graph/badge.svg?token=F676tOSaLF :target: https://codecov.io/gh/marshmallow-code/flask-smorest :alt: Code coverage

'cause everybody wants s'more

flask-smorest is a REST API framework built upon Flask <https://palletsprojects.com/p/flask/>_ and marshmallow <https://github.com/marshmallow-code/marshmallow>_.

Features

  • Serialization, deserialization and validation using marshmallow Schema
  • Explicit validation error messages returned in response
  • Database-agnostic
  • OpenAPI (Swagger) specification automatically generated and exposed with ReDoc <https://github.com/Rebilly/ReDoc>, Swagger UI <https://swagger.io/tools/swagger-ui/> or RapiDoc <https://mrin9.github.io/RapiDoc/>_
  • Pagination
  • ETag

Install

::

pip install flask-smorest

Documentation

Full documentation is available at http://flask-smorest.readthedocs.io/.

Contributing

Check out the Contributing Guidelines <https://github.com/marshmallow-code/.github/blob/main/CONTRIBUTING.md>_ to see how you can help.

Please also check out our Code of Conduct <https://github.com/marshmallow-code/.github/blob/main/CODE_OF_CONDUCT.md>_.

Support flask-smorest

If you'd like to support the future of the project, please consider contributing to marshmallow's Open Collective:

.. image:: https://opencollective.com/marshmallow/donate/button.png :target: https://opencollective.com/marshmallow :width: 200 :alt: Donate to our collective

License

MIT licensed. See the LICENSE <https://github.com/marshmallow-code/flask-smorest/blob/main/LICENSE>_ file for more details.